DrugDigest: Nelfinavir ( Viracept ): Information on dosage, usage, side effects, interactions, and drug comparisons, including generics when available.Nelfinavir: a.k.a. Nelfinavir Mesylate, Viracept.Nelfinavir: (Viracept)Viracept: Full prescribing information from RxList.Viracept: A potent protease inhibitor for treatment of HIV. (Nelfinavir Mesylate)