... Synonyms: proscar, propecia Name: Finasteride, proscar, propeciaApperance: white or off-white crystalline powderMolecular Formula: C23H36N2O2 Molecular Weight; 372.55 CAS ... its short 6-8 hour half-life, in trial studies, side effects ceased after dosage was discontinued.Side ... within 6-12 months of ceasing therapy.[9] In clinical studies, Propecia, like minoxidil, was shown to work on ...