Indinavir sulfate (MK-639) is an orally active and selective HIV-1 protease inhibitor with a Ki of 0.54 nM for PR. Indinavir sulfate exhibits anticancer activity by inhibiting the activation of MMPs-2 hydrolysis, anti-angiogenesis and inducing apoptosis. Indinavir sulfate is also a SARS-CoV 3CLpro inhibitor