| SCICLONE PHARMACEUTICALS INC      Item 1A Risk Factors        You should carefully consider the risks described below, in addition to the     other information in this report on Form 10-K, before making an investment     decision | 
    
    
      | Each of these risk factors could adversely affect our business,     financial condition, and operating results as well as adversely affect the     value of an investment in our common stock | 
    
    
      | Additional  clinical  trials  will  be  required  for  the  successful     commercialization of ZADAXIN and if the results of our clinical trials are     not favorable, we will be unable to obtain regulatory approval for the     intended indications we are evaluating | 
    
    
      | Our ability to achieve and sustain operating profitability depends in large     part on our ability to commence, execute and complete clinical programs and     obtain additional regulatory approvals for ZADAXIN and other drug                                           18     ______________________________________________________________________    [46]Table of Contents       candidates,  particularly in the United States and Europe | 
    
    
      | We are also     dependent  on our ability to increase ZADAXIN sales in China and other     markets | 
    
    
      | In particular, our ability to achieve and sustain profitability     will depend in large part on our ability to commercialize ZADAXIN for the     treatment of HCV or malignant melanoma in the United States and Europe | 
    
    
      | To obtain regulatory approvals, we must, among other requirements, complete     carefully controlled and well-designed clinical trials demonstrating that a     particular drug is safe and effective for the applicable disease | 
    
    
      | We cannot     depend on data from prior trial results to predict or demonstrate that our     potential drug products are safe and efficacious under regulatory guidelines     to qualify for commercial sale | 
    
    
      | We cannot assure you, nor can you rely on     our previous clinical trial results to predict, that our ongoing or future     clinical  trials will yield favorable results | 
    
    
      | Adverse or inconclusive     clinical results would prevent us from filing for regulatory approval of     ZADAXIN (thymosin alpha 1) for the indications that we are evaluating, and     our  current  programs in those areas would fail | 
    
    
      | In the past, Alpha 1     Biomedical, from which we acquired certain rights to thymosin alpha 1,     conducted a phase 3 clinical trial of thymosin alpha 1 as a therapy for HBV     that  did  not  produce  statistically significant results and Alpha 1     Biomedical did not submit an NDA to the FDA       In December 2005 we announced results from the first of our two US phase 3     HCV  clinical trials | 
    
    
      | This clinical trial did not demonstrate that the     combination  of  ZADAXIN  and  pegylated  interferon  alpha provides a     statistically significant clinical benefit when compared to the use of     pegylated interferon alpha alone in non-responder patients without cirrhosis     of  the liver, although a positive ZADAXIN treatment-related trend was     observed | 
    
    
      | Data from the second US phase 3 HCV clinical trial using ZADAXIN     in combination with pegylated interferon alpha to treat non-responder HCV     patients with early cirrhosis is expected to be reported in June 2006 | 
    
    
      | Given     the FDA general requirement of successful results from two phase 3 clinical     trials to support an approvable New Drug Application, it is unlikely that an     NDA based on these two clinical trials would be approved by the FDA The     current standard of care for HCV therapy is the combination of pegylated     interferon alpha with ribavirin | 
    
    
      | This combination is not approved by the FDA     or  the EMEA for the treatment of non-responders, however, in clinical     practice pegylated interferon alpha with ribavirin is widely used for the     treatment  of both treatment naïve and non-responder HCV patients | 
    
    
      | The     European HCV phase 3 clinical trial being conducted by Sigma-Tau has been     designed to compare the efficacy of the triple combination of ZADAXIN,     pegylated interferon alpha and ribavirin with the current standard of care | 
    
    
      | As with the FDA, the EMEA generally requires two confirmatory phase 3     clinical trials to support their equivalent of an NDA Therefore, results of     the  current  triple  therapy  combination trial, even if positive and     statistically significant, would by themselves be insufficient to support an     NDA to the EMEA, and results from a second confirmatory phase 3 clinical     trial would be needed | 
    
    
      | We cannot assure you that we or our European partner, Sigma-Tau, will     undertake  such  trial,  that any clinical trial of the triple therapy     combination will yield favorable results, that the second US phase 3 HCV     clinical trial will show statistical significance, that we will receive     approval for ZADAXIN for the treatment of HCV in Europe or the United States     or for the treatment of HCV in other countries, or that we will achieve     significant levels of sales | 
    
    
      | In December 2005, we and Sigma-Tau announced promising interim results from     a large phase 2 clinical trial in Europe evaluating ZADAXIN in combination     with dacarbazine (DTIC) chemotherapy with and without low-dose interferon     alpha to treat patients with stage IV, the most advanced and imminently     fatal form of, malignant melanoma | 
    
    
      | These preliminary data show a distinct     ZADAXIN dose-dependent response in combination with DTIC chemotherapy with     and without low-dose interferon alpha | 
    
    
      | The trial’s primary endpoint is     overall  tumor response | 
    
    
      | Preliminary survival information on the first     320-patient  cohort  is expected in mid-2006 | 
    
    
      | We and Sigma-Tau plan to     initiate phase 3 clinical trials in late 2006 to study the efficacy of     ZADAXIN in combination with chemotherapy for the treatment of malignant     melanoma | 
    
    
      | We  cannot assure you that the final results of the phase 2     clinical trial will be favorable or support the design and initiation of     phase 3 clinical trials, that we or Sigma-Tau will receive approval for the     indication or that we will achieve significant levels of sales | 
    
    
      | 19     ______________________________________________________________________    [47]Table of Contents       We may have difficulty in recruiting patients for our clinical trials | 
    
    
      | Higher than anticipated patient drop out rates in our clinical trials could     adversely  affect  trial  results and make it more difficult to obtain     regulatory approval | 
    
    
      | In December 2005 we announced results from the first of our two US phase 3     HCV  clinical trials | 
    
    
      | These results may make Sigma-Tau’s efforts to fully recruit     patients  for the currently ongoing ZADAXIN phase 3 HCV triple therapy     combination trial more difficult and take longer than planned | 
    
    
      | In addition,     HCV clinical trials are lengthy | 
    
    
      | The trials require patient treatment for 48     weeks and a follow-up observation period for an additional 24 weeks | 
    
    
      | Patient     dropouts are expected and each of our two phase 3 HCV clinical trials in the     United States enrolled more than the planned number of 500 patients, but     even then dropouts were higher than anticipated | 
    
    
      | A patient who drops out at     any  point  in  the  72 weeks of the trial is considered a “failure to     respond” in results of the clinical trial | 
    
    
      | In general, the fewer patients     who complete each trial, the higher the positive response rate for the group     of remaining ZADAXIN treated patients in such trial needs to be in order to     demonstrate statistical significance | 
    
    
      | Therefore, a higher than anticipated     dropout rate lowers the chances of proving statistical significance which     could adversely affect our clinical trial results | 
    
    
      | Dropouts did not prevent     us from completing our first US phase 3 HCV clinical trial and are not     expected to prevent completion of our second trial, however, the European     phase 3 HCV triple therapy combination trial is still enrolling patients and     dropouts may affect the ability to fully enroll the trial in a reasonable     period of time and the final results of the trial | 
    
    
      | We cannot predict the safety profile of the use of ZADAXIN when used in     combination with other drugs | 
    
    
      | Many of our trials involve the use of ZADAXIN in combination with other     drugs | 
    
    
      | Some  of these drugs, particularly pegylated interferon alpha,     ribavirin and dacarbazine are known to cause adverse patient reactions | 
    
    
      | Even     if ZADAXIN does not produce adverse side effects when used alone, we cannot     predict  how it will work with other drugs, including causing possible     adverse side effects not directly attributable to the other drugs that could     compromise the safety profile of ZADAXIN when used in certain combination     therapies | 
    
    
      | If  we  do not obtain regulatory approval for ZADAXIN for the intended     indications that we are evaluating, our revenues will be limited and we may     never become profitable | 
    
    
      | Our ability to execute on our business strategy has been largely dependent     on  our  ability to obtain regulatory approval for the use of ZADAXIN,     particularly  in the United States and Europe | 
    
    
      | The regulatory approval     processes  in the United States and Europe are demanding and typically     require 12 months or more in the United States and 18 months or more in     Europe from the date of submission of a New Drug Application (NDA) | 
    
    
      | We have     committed significant resources, including capital and time, to develop     ZADAXIN, and intend to continue to do so, including the initiation and     execution of additional clinical trials, with the goal of obtaining such     approvals | 
    
    
      | If we do not obtain these approvals, we will be unable to achieve     any substantial increase in our revenue from ZADAXIN and our ZADAXIN sales     in other jurisdictions could decline | 
    
    
      | All new drugs, including our products, which have been developed or are     under development, are subject to extensive and rigorous regulation by the     FDA and comparable agencies in state and local jurisdictions and in foreign     countries | 
    
    
      | These regulations govern, among other things, the development,     testing, manufacturing, labeling, storage, pre-market approval, importation,     advertising,  promotion,  sale and distribution of our products | 
    
    
      | These     regulations may change from time to time and new regulations may be adopted | 
    
    
      | Obtaining regulatory approval in developing countries also is time-consuming     and expensive | 
    
    
      | In some countries where we are contemplating marketing and     selling ZADAXIN, the regulatory approval process often relies on prior     approvals obtained in the United States or in Europe | 
    
    
      | Without such prior     approvals, our ability to                                           20     ______________________________________________________________________    [48]Table of Contents       obtain regulatory approvals for ZADAXIN in these countries may be delayed or     prevented | 
    
    
      | In addition, to secure these regulatory approvals, we will need,     among  other  things, to demonstrate favorable results from additional     clinical trials of ZADAXIN Even if we are able to complete the clinical     trials we have sponsored or are planning in a timely or cost-effective     manner, these trials may not fulfill the applicable regulatory approval     criteria, in which case we will not be able to obtain regulatory approval in     these countries, and we have experienced difficulties in preparing for     regulatory approval in Japan | 
    
    
      | We cannot assure you that we will ultimately     obtain  regulatory approvals in our targeted countries in a timely and     cost-effective  manner  or  at  all | 
    
    
      | If we fail to obtain the required     regulatory approvals to develop, market and sell ZADAXIN in countries where     we currently do not have such rights, our revenues will be limited, and our     future prospects will be dependent upon our ability to in-license or to     bring  earlier  stage  products  to  market, any of which will require     substantial financial expenditures | 
    
    
      | Satisfaction of government regulations may take several years and the time     needed to satisfy them varies substantially based on the type, complexity     and  novelty  of  the  pharmaceutical product | 
    
    
      | As a result, government     regulation may cause us to delay the introduction of, or prevent us from     marketing, our existing or potential products for a considerable period of     time and impose costly procedures upon our activities | 
    
    
      | Even if we obtain     regulatory approval for our products, such approval may impose limitations     on the indicated uses for which our products may be marketed | 
    
    
      | Unsatisfactory     data resulting from clinical trials may also adversely affect our ability to     market and sell ZADAXIN in markets where it is approved for sale | 
    
    
      | If we lose key personnel or are unable to attract and retain additional,     highly skilled personnel required for the expansion of our activities, our     business will suffer | 
    
    
      | We are highly dependent upon our ability to attract and retain qualified     personnel because of the specialized, scientific and worldwide nature of our     business | 
    
    
      | Following the departure of our Chief Executive Officer on July 14,     2004,  we established an Office of the President, and believe that the     Company continued to function effectively under the Office of the President | 
    
    
      | Our new President and Chief Executive Officer, Dr | 
    
    
      | Ira Lawrence, began his     service  to  the  Company on June 1, 2005 | 
    
    
      | However, we may be affected     adversely by any future changes in our key management personnel | 
    
    
      | There is     intense competition for qualified management, scientific and technical     personnel in the pharmaceutical industry, and we may not be able to attract     and retain the qualified personnel we need to grow and develop our business     globally | 
    
    
      | In addition, we assign numerous key responsibilities to a limited     number  of  individuals, and we would experience difficulty in finding     immediate replacements for any of them | 
    
    
      | If we were unable to attract and     retain qualified personnel as needed or promptly replace those employees who     are  critical  to  our  product development and commercialization, the     development  and  commercialization of our products would be adversely     affected | 
    
    
      | At this time, we do not maintain “key person” life insurance on     any of our personnel | 
    
    
      | Our  revenue is dependent on the sale of ZADAXIN in foreign countries,     particularly China, and if we experience difficulties in our foreign sales     efforts, our operating results and financial condition will be harmed | 
    
    
      | Our product revenue in the near term is highly dependent on the sale of     ZADAXIN in foreign countries | 
    
    
      | If we experience difficulties in our foreign     sales  efforts, our business will suffer and our operating results and     financial condition will be harmed | 
    
    
      | In the year ended December 31, 2005,     approximately 91prca of our ZADAXIN sales were to customers in China | 
    
    
      | For the     years ended December 31, 2004 and 2003, sales to our customers in China     accounted for approximately 91prca and 88prca, respectively, of product sales | 
    
    
      | Sales of ZADAXIN in China may be limited due to the low average personal     income, lack of patient cost reimbursement, poorly developed infrastructure     and  existing and potential competition from other products, including     generics | 
    
    
      | In China, ZADAXIN is approved only for the treatment of HBV and as     a  vaccine  adjuvant | 
    
    
      | We  face competition from certain large, global     pharmaceutical companies who are aggressively marketing competing products     for the treatment of HBV and other indications where ZADAXIN is used on an     off-label basis | 
    
    
      | In addition, several local companies have introduced lower     priced locally manufactured generic thymosin which is a competitive product | 
    
    
      | 21     ______________________________________________________________________    [49]Table of Contents       We expect such competition to continue and there could be a negative impact     on the price and the volume of ZADAXIN sold in China, which would harm our     business | 
    
    
      | Our efforts to in-license other pharmaceutical products for     marketing in China and other markets may be unsuccessful or may not have a     meaningful effect on our dependence on ZADAXIN sales in those markets | 
    
    
      | Our ZADAXIN sales and operations in other parts of Asia, as well as in Latin     America and the Middle East, are subject to a number of risks, including     difficulties  and  delays in obtaining registrations, permits, pricing     approvals and reimbursement, unexpected changes in regulatory requirements     and political instability | 
    
    
      | We are also subject to the laws and regulations     of other countries regarding the marketing, sale and distribution of our     products  in  those  countries  where approvals have been obtained | 
    
    
      | We     experience other issues with managing foreign sales operations including     long  payment  cycles,  potential  difficulties in accounts receivable     collection and, especially from significant customers, fluctuations in the     timing and amount of orders | 
    
    
      | Operations in foreign countries also expose us     to risks relating to difficulties in enforcing our proprietary rights,     currency fluctuations and adverse or deteriorating economic conditions | 
    
    
      | If     we  experience  problems  with obtaining registrations, complying with     reimbursement rules or compliance with other laws, or if we experience     difficulties  in  payments or intellectual property matters in foreign     jurisdictions, or if significant political, economic or regulatory changes     occur, our results could be adversely affected | 
    
    
      | We do not have product sales in the United States, Europe or Japan with     which to offset any decrease in our revenue from ZADAXIN sales in Asia,     Latin America and the Middle East, and sales outside of China have not been     substantial to date | 
    
    
      | In addition, some countries in these regions, including     China, regulate pharmaceutical prices and pharmaceutical importation | 
    
    
      | These     regulations may reduce prices for ZADAXIN to levels significantly below     those that would prevail in an unregulated market, limit the volume of     product which may be imported and sold or place high import duties on the     product, any of which may limit the growth of our revenues or cause them to     decline | 
    
    
      | In China, individual provinces and, in some cases, individual     hospitals can and have established pricing requirements for a product to be     included on formulary lists | 
    
    
      | These prices may be lower than our distributors     have been selling ZADAXIN in which case we have been removed from formulary     lists, which consequently has reduced sales to certain hospitals | 
    
    
      | Because of China’s tiered method of importing and distributing finished     pharmaceutical products, our quarterly results may vary substantially from     one period to the next | 
    
    
      | China uses a tiered method to import and distribute finished pharmaceutical     products | 
    
    
      | At each port of entry, and prior to moving the product forward to     the distributors, government-licensed importing agents must process and     evaluate each shipment to determine whether such shipment satisfies China’s     quality assurance requirements | 
    
    
      | In order to efficiently manage this process,     the importing agents typically place large, and therefore relatively few,     orders within any six month period | 
    
    
      | Therefore, our sales to an importing     agent can vary substantially from quarter to quarter depending on the size     and timing of the orders, which has in the past and may in the future cause     our quarterly results to fluctuate | 
    
    
      | We rely on four to six importers, in any     given quarter, to supply substantially all of our product in China | 
    
    
      | Because     we use a small number of importing agents in China, our receivables from any     one  importing  agent  are  material, and if we were unable to collect     receivables from any importer, our business and cash-flow would be adversely     affected | 
    
    
      | Our sales of ZADAXIN may fluctuate due to seasonality of product orders and     sales in any quarter may not be indicative of future sales | 
    
    
      | Our sales for the quarter ended June 30, 2003 were greatly affected by the     demand in China for ZADAXIN in connection with the treatment of SARS To     date, SARS has not re-emerged, like influenza, as a seasonal public health     problem | 
    
    
      | However, if SARS or a similar epidemic were to emerge, it is not     possible to predict what effect, if any, this would have on future sales of     ZADAXIN Although we do not market ZADAXIN for use in treating such epidemic     diseases, if ZADAXIN is purchased in connection with future outbreaks of     seasonal viral contagions, product sales could become more concentrated in     certain  quarters  of  the calendar year, quarterly sales levels could     fluctuate and sales in any quarter may not be indicative of sales in future     periods | 
    
    
      | 22     ______________________________________________________________________    [50]Table of Contents       If we fail to protect our products, technologies and trade secrets, we may     not be able to successfully use, manufacture, market or sell our products,     or we may fail to advance or maintain our competitive position, and we have     limited intellectual property protection in China | 
    
    
      | Our success depends significantly on our ability to obtain and maintain     meaningful  patent protection for our products and technologies and to     preserve our trade secrets | 
    
    
      | Our pending patent applications may not result     in the issuance of patents in the future | 
    
    
      | Our patents or patent applications     may not have priority over others’ applications | 
    
    
      | Our existing patents and     additional patents that may be issued, if any, may not provide a competitive     advantage to us or may be invalidated or circumvented by our competitors | 
    
    
      | Others may independently develop similar products or design around patents     issued or licensed to us | 
    
    
      | Patents issued to, or patent applications filed     by, other companies could harm our ability to use, manufacture, market or     sell our products or maintain our competitive position with respect to our     products | 
    
    
      | Although many of our patents relating to ZADAXIN have expired,     including composition of matter patents, we have rights to other patents and     patent applications relating to ZADAXIN and ZADAXIN analogues, including     method  of  use patents with respect to the use of ZADAXIN for certain     indications | 
    
    
      | We do not have a patent on the use of ZADAXIN as a therapy for     the treatment of melanoma | 
    
    
      | If other parties develop generic forms of ZADAXIN     for  other  indications, including conducting clinical trials for such     indications,  our  patents and other rights might not be sufficient to     prohibit them from marketing and selling such generic forms of ZADAXIN If     other parties develop analogues or derivatives of ZADAXIN, our patents and     other rights might not be sufficient to prohibit them from marketing these     analogues or derivatives | 
    
    
      | Pharmaceutical products are either not patentable or have only recently     become patentable in some of the countries in which we market or may market     ZADAXIN We do not have patent protection for ZADAXIN in China, our largest     market | 
    
    
      | Other companies market generic thymosin alpha 1 in China, sometimes     in violation of our trademark or other rights which we defend by informing     physicians and hospitals of the practice as well as through the limited     legal recourse | 
    
    
      | Past enforcement of intellectual property rights in many of     these  countries,  including  China in particular, has been limited or     non-existent | 
    
    
      | Future enforcement of patents and proprietary rights in many     other countries will likely be problematic or unpredictable | 
    
    
      | Moreover, the     issuance  of a patent in one country does not assure the issuance of a     similar patent in another country | 
    
    
      | Claim interpretation and infringement     laws vary by nation, so the extent of any patent protection is uncertain and     may vary in different jurisdictions | 
    
    
      | If we are involved in intellectual property claims and litigation, the     proceedings may divert our resources and subject us to significant liability     for damages, substantial litigation expense and the loss of our proprietary     rights | 
    
    
      | Our  commercial  success  depends  in part on us not infringing valid,     enforceable  patents  or  proprietary rights of third parties, and not     breaching any licenses that may relate to our technologies and products | 
    
    
      | We     are aware of a third-party patent that may relate to our products and may     cover a method of action used by ZADAXIN We cannot assure you that our     mechanism of action does not infringe on their claim | 
    
    
      | In addition, we may     not be aware of all patents or patent applications that may impact our     ability to make, use or sell any of our potential products | 
    
    
      | For example,     US patent applications may be kept confidential for 12 or more months     while pending in the Patent and Trademark Office, and patent applications     filed in foreign countries are often first published six months or more     after filing | 
    
    
      | It is possible that we may unintentionally infringe these     patents or other patents or proprietary rights of third parties | 
    
    
      | We may in     the future receive notices claiming infringement from third parties as well     as invitations to take licenses under third-party patents | 
    
    
      | Any legal action     against us or our collaborative partners claiming damages and seeking to     enjoin commercial activities relating to our products and processes affected     by third-party rights may require us or our collaborative partners to obtain     licenses in order to continue to manufacture or market the affected products     and processes | 
    
    
      | Our efforts to defend against any of these claims, regardless     of merit, would require us to devote resources and attention that could have     been directed to our operations and growth plans | 
    
    
      | In addition, these actions     may subject us to potential liability for damages | 
    
    
      | We or our collaborative     partners may not prevail in a patent action and any license required under a     patent may not be                                           23     ______________________________________________________________________    [51]Table of Contents       made available on commercially acceptable terms, or at all | 
    
    
      | Any conflicts     resulting from the patent rights of others could significantly reduce the     coverage of our patents and limit our ability to obtain meaningful patent     protection | 
    
    
      | If  other  companies obtain patents with conflicting claims, we may be     required  to  obtain  licenses  to  those patents or develop or obtain     alternative technology to manufacture or market the affected products and     processes | 
    
    
      | We may not be able to obtain any such licenses on acceptable     terms or at all | 
    
    
      | Any failure to obtain such licenses could delay or prevent     us from pursuing the development or commercialization of our potential     products | 
    
    
      | Our efforts to defend against any of these claims would require us     to devote resources and attention that could have been directed to our     operations and growth plans | 
    
    
      | We  may need to initiate litigation, which could be time-consuming and     expensive, to enforce our proprietary rights or to determine the scope and     validity of others’ rights | 
    
    
      | If litigation results, a court may find our     patents or those of our licensors invalid or may find that we have infringed     on  a competitor’s rights | 
    
    
      | If any of our competitors have filed patent     applications  in the United States which claim technology we also have     invented, the Patent and Trademark Office may require us to participate in     expensive interference proceedings to determine who has the right to a     patent  for  the technology | 
    
    
      | These actions may subject us to potential     liability for damages | 
    
    
      | We or our collaborative partners may not prevail in a     patent  action and any license required under a patent may not be made     available on commercially acceptable terms, or at all | 
    
    
      | We  rely  on third parties to supply our clinical trial and commercial     products | 
    
    
      | Deficiencies  in their work could delay or harm one or more     important areas of our business including our sales, clinical trials or the     regulatory approval process | 
    
    
      | We rely on third parties, who are subject to regulatory oversight, to supply     our  clinical  and commercial products | 
    
    
      | We have been in the process of     registering a new manufacturer of ZADAXIN and if we encounter problems with     this  process of validation, our sales or our clinical trials could be     adversely affected | 
    
    
      | If sales of ZADAXIN were to increase dramatically, our     third-party suppliers may not be able to supply ZADAXIN quickly enough,     which could limit our ability to satisfy increased demand or could adversely     affect the ability of these suppliers to provide products for our clinical     trials | 
    
    
      | If unanticipated deficiencies in these suppliers occur, we could     experience delays in our ability to fulfill regulatory requirements which     may  adversely  affect our sales or prospects for regulatory marketing     approvals | 
    
    
      | We have an exclusive supplier of pegylated interferon alpha for     our US phase 3 HCV and European phase 3 HCV clinical trials | 
    
    
      | Any recall of     the  manufacturing  lots of the pegylated interferon alpha used in our     clinical trials could detract from the integrity of the trial data and its     potential use in future regulatory filings | 
    
    
      | If  we  are  not able to establish and maintain adequate manufacturing     relationships, the development and sale of our products could be impaired | 
    
    
      | To  be  successful,  our  products  must be manufactured in commercial     quantities, in compliance with stringent regulatory requirements and at an     acceptable cost | 
    
    
      | Typically we have at any time only one supplier for each     phase  of manufacturing of our product | 
    
    
      | Manufacturing interruptions or     failure to comply with regulatory requirements could significantly delay     clinical  development  of potential products and reduce third-party or     clinical  researcher  interest  and  support of proposed trials | 
    
    
      | These     interruptions  or  failures could also impede commercialization of our     products, including sales of ZADAXIN in approved markets, and impair our     competitive position | 
    
    
      | Any of these developments would harm our business | 
    
    
      | We  are  in the process of registering a new supplier for ZADAXIN with     regulatory agencies in markets where ZADAXIN is approved for sale | 
    
    
      | We have     received such registration in China | 
    
    
      | This process, quality assurance and     other steps could cause delays or interruptions of supply in certain other     markets | 
    
    
      | In some countries, a manufacturing change may require additional     regulatory approvals which may delay ZADAXIN marketing approvals in new     markets | 
    
    
      | In addition, manufacturing, supply and quality control problems may     arise                                           24     ______________________________________________________________________    [52]Table of Contents       as  we,  either  alone or with subcontractors, attempt to scale-up our     manufacturing procedures | 
    
    
      | We may not be able to scale-up in a timely manner     or at a commercially reasonable cost, either of which could cause delays or     pose a threat to the ultimate commercialization of our products and harm our     business | 
    
    
      | We may not be able to successfully develop or commercialize our products | 
    
    
      | We     may consider strategic alliances with other companies in efforts to broaden     our product development pipeline | 
    
    
      | While we have limited sales of ZADAXIN in certain markets, we do not yet     have regulatory approval for ZADAXIN for the key markets of the United     States,  Europe and Japan and, in this respect, ZADAXIN is still being     developed | 
    
    
      | Our only other potential product presently is SCV-07 and it is in     an earlier stage of development than ZADAXIN We may consider and undertake     various strategies to expand our portfolio of potential products, including     acquiring product candidate rights through licenses or other relationships,     or through other strategic relationships including acquisitions of other     companies that may have proprietary rights to other development candidates     or the capability to discover new drug candidates | 
    
    
      | Such transactions could     require a substantial amount of our financial resources, or, if equity is     involved,  may result in substantial dilution to current stockholders | 
    
    
      | Strategic transactions also require substantial management time and effort     and are subject to various risks that could adversely affect us or our     financial results | 
    
    
      | To fully develop our products, we will need to commit substantial resources     to extensive research, development, pre-clinical testing, clinical trials,     manufacturing  scale-up and regulatory approval prior to the potential     products  being ready for sale | 
    
    
      | We cannot assure that our efforts will     produce commercially viable products | 
    
    
      | We face significant technological     risks inherent in developing these products | 
    
    
      | We may also abandon some or all     of our proposed products before they become commercially viable | 
    
    
      | If any of     our  products,  even if developed and approved, cannot be successfully     commercialized in a timely manner, our business will be harmed and the price     of our stock may decline | 
    
    
      | We have not yet sold any product other than ZADAXIN and our sales have been     primarily in a single country, China | 
    
    
      | Our future revenue growth depends to     great extent on increased market acceptance and commercialization of ZADAXIN     in additional countries, particularly in the United States, Europe and     Japan | 
    
    
      | If  we  fail  to  successfully market ZADAXIN, or if we cannot     commercialize this drug in the United States and other additional markets,     our revenue and operating results will be limited | 
    
    
      | Our     future revenue will also depend in part on our ability to develop other     commercially viable and accepted products | 
    
    
      | Market acceptance of our products     will depend on many factors, including our ability to convince prospective     customers to use our products as an alternative to other treatments and     therapies and to convince prospective strategic partners to market our     products  effectively  and  to  manufacture our products in sufficient     quantities with acceptable quality and at an acceptable cost | 
    
    
      | In addition,     doctors must opt to use treatments involving our products | 
    
    
      | If doctors elect     to use a different course of treatment, demand for our drug products would     be reduced | 
    
    
      | Failure to do any of the above will lead to an unfavorable     outcome on the results of our operations | 
    
    
      | We rely on third-party clinical investigators to conduct our clinical trials     and, as a result, we may encounter delays outside our control | 
    
    
      | We have limited experience in conducting and managing clinical trials and we     rely,  in  part,  on  third  parties,  particularly  clinical research     organizations and our development partners, to assist us in managing and     monitoring clinical trials | 
    
    
      | Our reliance on these third parties may result     in delays in completing, or failure to complete, these clinical trials if     third parties fail to fulfill their obligations to us | 
    
    
      | We may need to obtain additional capital to support our long-term product     development and commercialization programs | 
    
    
      | We believe our existing resources will be sufficient to fund our operations,     including anticipated clinical trials, into late 2008 | 
    
    
      | However, we cannot     assure that such funds will be sufficient, or that we will attain                                           25     ______________________________________________________________________    [53]Table of Contents       profitable operations in that period if ever | 
    
    
      | In addition to development     plans for ZADAXIN, we intend to develop other products and we may need     additional funds in the future to support such development and to support     future growth and achieve profitability | 
    
    
      | If we need to raise additional     funds in the future and such funds are not available on reasonable terms, if     at all, our commercialization efforts may be impeded, our revenues may be     limited and our operating results may suffer | 
    
    
      | We have a history of operating losses and an accumulated deficit | 
    
    
      | We expect     to  continue  to  incur  losses in the near term and may never achieve     profitability | 
    
    
      | We have experienced significant operating losses since our inception, and as     of December 31, 2005, we had an accumulated deficit of approximately dlra159     million | 
    
    
      | We expect our operating expenses to increase over the next several     years as we plan to dedicate substantially all of our resources to expanding     our development, testing and marketing capabilities, and these losses may     increase if we cannot increase or sustain revenue | 
    
    
      | As a result, we may never     achieve profitability | 
    
    
      | We have limited sales, marketing and distribution capabilities outside of     China, which may adversely affect our ability to successfully commercialize     our products | 
    
    
      | Outside of our current principal market of China, we have limited sales,     marketing and distribution capabilities, and we anticipate that we may be     relying on third-party collaborators to sell, market and distribute our     products for the foreseeable future particularly in the major pharmaceutical     markets of the United States, Europe and Japan should we receive regulatory     approval to market our products in those territories | 
    
    
      | If our arrangements     with these third parties are not successful, or if we are unable to enter     into additional third-party arrangements, we may need to substantially     expand our sales, marketing and distribution force | 
    
    
      | Our efforts to expand     may not succeed, or we may lack sufficient resources to expand in a timely     manner, either of which will harm our future operating results | 
    
    
      | Moreover, if     we  are  able  to further expand our sales, marketing and distribution     capabilities,  we  will begin competing with other companies that have     experienced and well-funded operations | 
    
    
      | If we cannot successfully compete     with these larger companies, our revenues may not grow and our business may     suffer | 
    
    
      | Commercialization of some of our products depends on collaborations with     others | 
    
    
      | If our collaborators are not successful, or if we are unable to find     future  collaborators,  we  may  not  be  able to properly develop and     commercialize our products | 
    
    
      | We depend in part on our distributors and business partners to develop or     promote our drugs, and if they are not successful in their efforts or fail     to do so, our business will suffer | 
    
    
      | For example, Sigma-Tau is responsible     for the development and marketing of ZADAXIN in most of Europe | 
    
    
      | We generally     do  not  have control over the amount and timing of resources that our     business partners devote to ZADAXIN, and they have not always performed as     or when expected | 
    
    
      | If they do not perform their obligations as we expect,     particularly obligations regarding clinical trials, our development expenses     would increase and the development or sale of our products could be limited     or delayed, which could hurt our business and cause our stock price to     decline | 
    
    
      | In addition, our relationships with these companies may not be     successful | 
    
    
      | Disputes may arise with our collaborators, including disputes     over ownership rights to intellectual property, know-how or technologies     developed with our collaborators | 
    
    
      | We may not be able to negotiate similar     additional arrangements in the future to develop and commercialize ZADAXIN     or other products | 
    
    
      | We may lose market share or otherwise fail to compete effectively in the     intensely competitive biopharmaceutical industry | 
    
    
      | Competition in the biopharmaceutical industry is intense, and we expect that     competition will increase | 
    
    
      | Our success depends on our ability to compete in     this industry, but we cannot assure you that we will be able to successfully     compete with our competitors | 
    
    
      | Increased competitive pressure could lead to     intensified price-based competition resulting in lower prices and margins,     which would hurt our operating results | 
    
    
      | 26     ______________________________________________________________________    [54]Table of Contents       We are focused on developing ZADAXIN as a treatment for HCV and HBV and     certain cancers | 
    
    
      | Several large biopharmaceutical companies have substantial     commitments to interferon alpha, an approved drug for treating HBV and HCV,     and to lamivudine and adefovir, approved drugs to treat HBV We cannot     assure you that we will compete successfully against our competitors or that     our competitors, or potential competitors, will not develop drugs or other     treatments for HCV, HBV, cancer and other diseases that will be superior to     ours | 
    
    
      | If third-party reimbursement is not available or patients cannot otherwise     pay for ZADAXIN, we may not be able to successfully market ZADAXIN        Significant  uncertainty  exists as to the reimbursement status of new     therapeutic products, such as ZADAXIN We cannot assure you that third-party     insurance coverage and reimbursement will be available for therapeutic     products we might develop | 
    
    
      | We cannot assure you that we will be able to     maintain or increase third-party payments for ZADAXIN in China | 
    
    
      | The failure     to obtain or maintain third-party reimbursement for our products would harm     our business | 
    
    
      | Further, we cannot assure you that additional limitations will     not be imposed in the future in the United States or elsewhere on drug     coverage and reimbursement due to proposed health care reforms | 
    
    
      | In many     emerging  markets where we have marketing rights to ZADAXIN, but where     government resources and per capita income may be so low that our products     will be prohibitively expensive, we may not be able to market our products     on economically favorable terms, if at all | 
    
    
      | Efforts by governmental and third-party payers to contain or reduce health     care  costs or the announcement of legislative proposals or reforms to     implement government controls could cause us to reduce the prices at which     we market our drugs, which would reduce our gross margins and may harm our     business | 
    
    
      | Settlements regarding our claims relating to the Japanese clinical trials     may not be favorable | 
    
    
      | Based on recent information received from Schering Plough KK (SPKK) and in     conjunction with our own investigative efforts, we have determined that we     cannot  submit  a Japanese new drug application (JNDA), or apply for a     pre-JNDA  preliminary  review, for ZADAXIN as a therapy for HBV to the     Ministry of Health in Japan | 
    
    
      | This conclusion is based on SPKK’s failure to     conduct certain audits and generate certain reports during the pre-2001     studies that it managed and our conclusion that such documentation cannot be     created  at this time | 
    
    
      | This conclusion is not based on the substantive     results  of the Japan trials, which showed ZADAXIN to have competitive     efficacy  and  safety in the treatment of HBV We and SPKK continue to     investigate and discuss the issues involved, and how this matter should be     fairly resolved | 
    
    
      | We and SPKK are in the process of mediation which we expect     to  conclude by the end of our first fiscal quarter of 2006 | 
    
    
      | We cannot     provide any assurance as to the outcome of the mediation | 
    
    
      | If mediation     concludes without satisfactory results, we intend to pursue arbitration | 
    
    
      | Arbitration can be expensive and protracted and there can be no assurance     that this dispute will be concluded in the near future or resolved favorably     to us | 
    
    
      | SciClone is now determining the appropriate development strategy for ZADAXIN     in Japan, however, it is unlikely that SciClone will be able to submit a     JNDA for ZADAXIN in Japan for some years, if at all | 
    
    
      | If this process is     restarted, it could be lengthy and could incur significant management time     and expense | 
    
    
      | We may be subject to product liability lawsuits, and our insurance may be     inadequate to cover damages | 
    
    
      | Clinical trials or marketing of any of our current and potential products     may  expose  us to liability claims from the use of these products | 
    
    
      | We     currently carry product liability insurance | 
    
    
      | However, we cannot be certain     that we will be able to maintain insurance on acceptable terms, if at all,     for  clinical and commercial activities or that the insurance would be     sufficient to cover any potential product liability claim or recall | 
    
    
      | If we     fail to have sufficient coverage, our business, results of operations and     cash flows could be adversely affected | 
    
    
      | We depend on international sales, and global conditions could negatively     affect our operating results | 
    
    
      | Heightened tensions resulting     from the current geopolitical conditions in the Middle East, North Korea and     elsewhere could worsen, causing disruptions in foreign trade,                                           27     ______________________________________________________________________    [55]Table of Contents       which  would  harm our sales | 
    
    
      | In particular, our commercial product is     manufactured in Europe and distributed by us from our operations in Hong     Kong | 
    
    
      | Any disruption of our supply and distribution activities due to     geopolitical conditions could decrease our sales and harm our operating     results | 
    
    
      | If  we  are  unable  to  comply  with environmental and other laws and     regulations, our business may be harmed | 
    
    
      | We are subject to various federal, state and local laws, regulations and     recommendations relating to the use, manufacture, storage, handling and     disposal of hazardous materials and waste products (including radioactive     compounds  and  infectious  disease  agents),  as well as safe working     conditions, laboratory and manufacturing practices and the experimental use     of animals | 
    
    
      | The extent of government regulation that might result from     future  legislation  or administrative action in these areas cannot be     accurately predicted | 
    
    
      | We do not currently maintain hazardous materials at our facilities | 
    
    
      | While we     outsource our research and development programs involving the controlled use     of  biohazardous materials, if in the future we conduct these programs     ourselves, we might be required to incur significant cost to comply with     environmental laws and regulations | 
    
    
      | Further, in the event of an accident, we     would be liable for any damages that result, and the liability could exceed     our resources | 
    
    
      | Our stock price may be volatile, and an investment in our stock could suffer     a decline in value | 
    
    
      | The market price of our common stock has experienced, and may continue to     experience, substantial volatility due to many factors, some of which we     have no control over, including:           •   progress and results of clinical trials involving ZADAXIN;           •   progress of ZADAXIN through the regulatory process, especially     regulatory actions and the adequacy of clinical data and documentation for     regulatory purposes in the United States, Europe and Japan;           •   timing and achievement of milestones;           •   announcements of technological innovations or new products by us or     our competitors;           •   announcement and completion of corporate acquisition, merger,     licensing or marketing arrangements, or sales of assets;           •   government regulatory action affecting our drug products or our     competitors’ drug products in both the United States and foreign countries;           •   developments or disputes concerning patent or proprietary rights;           •   changes in the composition of our management team or board of     directors;           •   changes in company assessments or financial estimates by securities     analysts;           •   actual or anticipated fluctuations in our quarterly operating results;           •   changes in assessments of our internal controls over financial     reporting;           •   general stock market conditions and fluctuations for the emerging     growth and biopharmaceutical market sectors;           •   economic conditions in the United States or abroad; and           •   broad financial market fluctuations in the United States, Europe or     Asia | 
    
    
      | In the past, following periods of large price declines in the public market     price of a company’s securities, securities class action litigation has     often been initiated against that company | 
    
    
      | Litigation of this type could     result in substantial costs and diversion of our attention and resources,     which would hurt our business | 
    
    
      | Any adverse determination in litigation could     also subject us to significant liabilities | 
    
    
      | 28     ______________________________________________________________________    [56]Table of Contents       Substantial sales of our stock or the exercise or conversion of options or     convertible securities may impact the market price of our common stock | 
    
    
      | Our collaborative partner Sigma Tau and affiliates hold a substantial amount     of our stock | 
    
    
      | The stock is freely tradeable and Sigma Tau is not under any     obligation to SciClone which would prevent it from selling some or all of     the stock it holds | 
    
    
      | Future sales of substantial amounts of our common stock could adversely     affect  the  market  price of our common stock | 
    
    
      | Similarly, if we raise     additional  funds  through  the issuance of common stock or securities     convertible into or exercisable for common stock, the percentage ownership     of our present stockholders will be reduced and the price of our common     stock may fall | 
    
    
      | Sales of our common stock by officers and directors could affect our stock     price | 
    
    
      | Our board of directors has approved an amendment to our trading policy that     permits officers and directors to enter into trading plans that comply with     the requirements of Rule 10b5-1 of the Securities Exchange Act of 1934, as     amended | 
    
    
      | Rule 10b5-1 allows corporate officers and directors to adopt     written, pre-arranged stock trading plans when they do not have material,     non-public  information | 
    
    
      | Using these plans, officers and directors can     gradually diversify their investment portfolios, can spread stock trades out     over an extended period of time to reduce any market impact and can avoid     concerns about initiating stock transactions at a time when they might be in     possession of material, non-public information | 
    
    
      | As of February 13, 2006, one     director has adopted such a plan, and other directors or officers may do so     in the future | 
    
    
      | We expect future sales by officers and directors either under     10b5-1 plans or otherwise as a result of their personal financial planning | 
    
    
      | We do not believe the volume of such sales would affect our trading price;     however, the market could react negatively to sales by our officers and     directors, which could affect the trading price of our stock | 
    
    
      | Anti-takeover provisions in our charter documents and under Delaware law may     make an acquisition of us, which may be beneficial to our stockholders, more     difficult | 
    
    
      | Certain anti-takeover provisions of Delaware law and our charter documents     as currently in effect may make a change in control of our company more     difficult,  even  if  a  change  in control would be beneficial to our     stockholders | 
    
    
      | Our  charter  documents  contain  certain anti-takeover     provisions,  including  provisions in our certificate of incorporation     providing that stockholders may not cumulate votes, stockholders’ meetings     may be called by stockholders only if they hold 25prca or more of our common     stock and provisions in our bylaws providing that the stockholders may not     take action by written consent | 
    
    
      | Additionally, our board of directors has the     authority to issue 10 million shares of preferred stock and to determine the     terms  of  those  shares  of  stock  without any further action by the     stockholders | 
    
    
      | The rights of holders of our common stock are subject to the     rights  of  the holders of any preferred stock that may be issued | 
    
    
      | The     issuance of preferred stock could make it more difficult for a third-party     to acquire a majority of our outstanding voting stock | 
    
    
      | Delaware law also     prohibits corporations from engaging in a business combination with any     holders of 15prca or more of their capital stock until the holder has held the     stock  for three years unless, among other possibilities, the board of     directors approves the transaction | 
    
    
      | Our board of directors may use these     provisions to prevent changes in the management and control of our company | 
    
    
      | Also,  under applicable Delaware law, our board of directors may adopt     additional anti-takeover measures in the future | 
    
    
      | If we fail to maintain an effective system of internal controls, we may not     be able to accurately report our financial results | 
    
    
      | As a result, current and     potential stockholders could lose confidence in our financial reporting,     which would harm our business and the trading price of our stock | 
    
    
      | Effective  internal  controls are necessary for us to provide reliable     financial reports | 
    
    
      | If we cannot provide reliable financial reports, our     business  and  operating  results could be harmed | 
    
    
      | We have in the past     discovered, and may in the future discover, areas of our internal controls     that need improvement | 
    
    
      | For example, in the quarter                                           29     ______________________________________________________________________    [57]Table of Contents       ended June 30, 2005, we identified a material weakness in our internal     controls over financial reporting as defined in Public Company Accounting     Oversight Board (PCAOB) Standard Nodtta 2 | 
    
    
      | This material weakness related to     our failure, due to our lack of familiarity with certain technical stock     option accounting matters, to evaluate the correct accounting effect of a     stock price performance based option granted to our Chief Executive Officer     on June 1, 2005, the date he commenced his employment | 
    
    
      | Due to the terms of     this option, Accounting Principles Board Opinion Nodtta 25 (APB 25) requires     the  application  of variable accounting and specifically requires the     recognition of non-cash expense in the period that portions of the option     vest or are deemed probable of vesting at the end of the reporting period | 
    
    
      | The vesting of this option is directly determined by the price level of     trading activity in our stock, and the conditions required to recognize a     related non-cash expense did not occur in the interim period ended June 30,     2005 | 
    
    
      | However, had the conditions required the recognition of a non-cash     expense related to this option under APB 25, our accounting procedures at     June 30,  2005 would not have correctly applied APB 25 | 
    
    
      | Because of the     material weakness described above, management concluded that the Company did     not maintain effective internal control over financial reporting as of     June 30, 2005 | 
    
    
      | The Company’s management identified the steps necessary to     address the material weakness described above, and executed remediation     plans,  as  discussed  in  “Item  4 | 
    
    
      | Controls  and Procedures” of our     September 30, 2005 quarterly report on Form 10-Q incorporated by reference | 
    
    
      | Any failure to implement and maintain the improvements in the controls over     our financial reporting, or difficulties encountered in the implementation     of these improvements in our controls, could cause us to fail to meet our     reporting obligations | 
    
    
      | Any failure to improve our internal controls to     address these identified weaknesses could also cause investors to lose     confidence  in  our reported financial information, which could have a     negative impact on the trading price of our stock | 
    
    
      | New accounting pronouncements may impact our financial position or results     of operations | 
    
    
      | Future  changes  in  financial accounting standards may cause adverse,     unexpected fluctuations in the timing of the recognition of revenues or     expenses and may affect our financial position or results of operations | 
    
    
      | New     pronouncements and varying interpretations of pronouncements have occurred     with frequency and may occur in the future and this may lead to changes in     our accounting policies in the future | 
    
    
      | One such new pronouncement issued in     December 2004 by the Financial Accounting Standards Board (FASB) is FASB     Statement Nodtta 123 (revised 2004), “Share-Based Payment” (SFAS 123R) | 
    
    
      | SFAS     123R requires share-based payments to employees and directors, including     grants of stock options, to be recognized in the statement of operations     based on their fair values | 
    
    
      | The     Company  currently  accounts for share-based payments to employees and     directors using Accounting Principles Board Opinion 25’s intrinsic value     method and, as such, generally recognizes no compensation cost for employee     and director stock options and employee stock purchase plans | 
    
    
      | Accordingly,     the adoption of SFAS 123R’s fair value method will have a significant impact     on our results of operations, although it will have no impact on our cash or     overall financial position | 
    
    
      | New legislation may impact our financial position or results of operations | 
    
    
      | Compliance with changing regulations concerning corporate governance and     public disclosure has resulted in and may continue to result in additional     expenses | 
    
    
      | Changing laws, regulations and standards relating to corporate     governance and public disclosure, including the Sarbanes-Oxley Act of 2002,     new  SEC  regulations  and  NASDAQ National Market rules, are creating     uncertainty for companies such as ours and costs are increasing as a result     of this uncertainty and other factors | 
    
    
      | We are committed to maintaining high     standards of corporate governance and public disclosure | 
    
    
      | As a result, we     intend to invest all reasonably necessary resources to comply with evolving     standards, and this investment has and may continue to result in increased     general and administrative expenses and a diversion of management time and     attention from revenue-generating activities to compliance activities | 
    
    
      | We  may be subject to currency exchange rate fluctuations, which could     adversely affect our financial performance | 
    
    
      | Substantially all of our product sales are denominated in US dollars | 
    
    
      | Fluctuation in the US dollar exchange rate with local currency directly     affects the customer’s cost for our product | 
    
    
      | In particular, a stronger                                           30     ______________________________________________________________________    [58]Table of Contents       US dollar vis-à-vis the local currency would tend to have an adverse     effect  on sales and potentially on collection of accounts receivable | 
    
    
      | Through the periods ended December 31, 2005, this exposure to currency     exchange rate fluctuations had been minimal because the Chinese currency had     been pegged to the US dollar | 
    
    
      | However, the Chinese currency is no longer     pegged to the US dollar and consequently, our foreign operations may     expose us to greater risk of decreased sales due to currency exchange rate     fluctuations in the future | 
    
    
      | In addition, we are subject to currency exchange     rate  fluctuations  as  a  result  of expenses incurred by our foreign     operations | 
    
    
      | In particular, one of our supply arrangements under which we     purchase  finished  products  is denominated in euros and costs of our     marketing efforts in China are paid in local currency | 
    
    
      | Consequently, changes     in exchange rates could unpredictably and adversely affect our operating     results and could result in exchange losses | 
    
    
      | To date, we have not hedged     against  the risks associated with fluctuations in exchange rates and,     therefore, exchange rate fluctuations could have a material adverse impact     on our future operating results and stock price |