SAN MATEO, CA — April 27, 2007 — SciClone Pharmaceuticals, Inc. (NASDAQ: SCLN) today announced that the following abstracts have been accepted for the Annual Meeting of the American Society of Clinical Oncology in Chicago, Illinois on June 1-5, 2007:

ZADAXIN® (thymalfasin, thymosin alpha 1) Poster Presentation
A large first-line, randomized, dose-finding, phase II study on Thymosin alpha 1 (T?1) plus Dacarbazine (DTIC) with or without Interferon alpha (IFN?) vs DTIC plus IFN? in stage IV melanoma. Tumor response and survival results
(ASCO abstract number: 31541)

SCV-07 Abstract Proceedings
Effect of the Immune Modulating Peptide, SCV-07, in the Murine B16 Melanoma Model
(ASCO abstract number: 35151)

For further information about this conference, please visit www.asco.org.

About SciClone
SciClone Pharmaceuticals is a biopharmaceutical company engaged in the development of therapeutics to treat life-threatening diseases. SciClone's lead product ZADAXIN® is currently being evaluated in late-stage clinical trials for the treatment of malignant melanoma and hepatitis C. ZADAXIN is approved for sale in select markets internationally, most notably in China where SciClone has an established sales and marketing operation. A key part of SciClone's strategy is to leverage its advantage in the rapidly growing Chinese market by in-licensing or acquiring the marketing rights to other products, such as DC BeadTM, currently pending Chinese regulatory approval for the treatment of liver cancer. For the U.S. market, SciClone's clinical-stage drug development candidates are SCV-07 for the treatment of viral infectious diseases and RP101 for the treatment of pancreatic cancer. For more information about SciClone, visit www.sciclone.com.