SHANGHAI – In China's evolving regulatory and pricing environment, Sciclone Pharmaceuticals Inc., of Foster City, Calif., has managed to keep growing its bottom line with lead drug Zadaxin (thymalfasin), an imported drug manufactured in Italy for the treatment of hepatitis B, hepatitis C, certain cancers and as a vaccine adjuvant. In the first quarter, the firm raked in $33.6 million, growing 7 percent from the year prior and beating China's average pharma growth rate by 1 percent.