Used primarily in the treatment of HIV infection, this compound acts as a potent inhibitor of the cytochrome P450 3A4 (CYP3A4) enzyme system. Due to this property, it is widely employed as a pharmacokinetic enhancer in combination therapies. It boosts the effectiveness of other antiretroviral drugs, especially protease inhibitors, by slowing their metabolism and increasing their blood concentration. This allows for lower doses and less frequent administration of the co-administered drugs, improving patient adherence and treatment outcomes. It is also used off-label to enhance the efficacy of certain antiviral agents in the management of other viral infections.