- protease inhibitor, PI - an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs
--1 is a kind of antiviral, antiviral agent, antiviral drug
--1 is a part of drug cocktail, highly active antiretroviral therapy, HAART
--1 has particulars:indinavir, Crixivan; nelfinavir, Viracept; ritonavir, Norvir; saquinavir, Invirase