I'd like to find out where I can fill a prescription for Zadaxin or its generic equivalent (Thymalfasin) which are actually Thymosin alpha 1. Thanks. ## Zadaxin is manufactured by SciClone Pharmaceuticals. You might try contacting them to see where their product is commercially obtainable: SciClone Pharmaceuticals, Inc. 950 Tower Lane, Suite 900 Foster City, California 94404-2125 Phone: (650) 358-3456 Fax: (650) 358-3469 I hope this helps. Please post back with any other questions or details which you would can include.