<prompt> Nevirapine isNonnucleoside reverse transcriptase inhibitor NNINucleoside reverse transcriptase inhibitor NIsProtease inhibitor PIFusion inhibitor  <response>: NIs are - Zidovudine, Lamivudine, Stavudine, Didanosine, Zalcitabine Emtricitabine, Abacavir, Tenofovir PIs are - Saquinavir, Indinavir, Ritonavir, Nelfinavir, Amprenavir, Lopinavir and Amprenavir Fusion inhibitor - Enfuviide Ref: HL Sharma 3rd edition anti retroviral drugs. 