Indinavir Sulphate is used for Hiv Infection and other conditions.Indinavir Sulphate Uses Indinavir Sulphate is used for the treatment, control, prevention, & improvement of the following diseases, conditions and symptoms Hiv Infection,Indinavir Sulphate Working, Mechanism of Action and Pharmacology Indinavir Sulphate improves the patient's condition by performing the following functions: Blocking the action of HIV-1 protease.