TYBOST, with its active ingredient cobicistat, is a medication primarily used as a pharmacokinetic enhancer to increase the effectiveness of certain antiretroviral drugs used in the treatment of HIV/AIDS. It works by inhibiting an enzyme that metabolizes drugs, thereby increasing their concentration in the blood without directly attacking the virus. This mechanism allows for more effective suppression of the viral load in patients when used in combination with other antiretroviral medications. TYBOST does not have any antiviral activity on its own. It is specifically designed to boost the levels of other HIV medications, making it a crucial component of some HIV treatment regimens to help maintain durable viral suppression.