This drug is used with other HIV medications to help control HIV infection. It helps to decrease the amount of HIV in your body so your immune system can work better. This lowers your chance of getting HIV complications (such as new infections, cancer) and improves your quality of life. Atazanavir belongs to a class of drugs known as protease inhibitors. Cobicistat is used to increase ("boost") the levels of atazanavir. This helps atazanavir work better.

Brand name:Evotaz

Active Ingeridents:Atazanavir /Cobicistat

Company Name: Glaxosmithkline

Package:30 Tablets /Bottle

Strength :Atazanavir + Cobicistat

Mechanism of action:


Atazanavir selectively inhibits the virus-specific processing of viral Gag and Gag-Pol polyproteins in HIV-1 infected cells by binding to the active site of HIV-1 protease, thus preventing the formation of mature virions. Atazanavir is not active against HIV-2.


Cobicistat is a mechanism-based inhibitor of cytochrome P450 3A (CYP3A) isoforms. Inhibition of CYP3A-mediated metabolism by cobicistat increases the systemic exposure of CYP3A substrates atazanavir and darunavir and therefore enables increased anti-viral activity at a lower dosage. Cobicistat does not have any anti-HIV activity on its own.

Dosage and Administration:

  • Read the Patient Information Leaflet if available from your pharmacist before you start taking Evotaz (Atazanavir /Cobicistat) and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

  • Take this medication by mouth with food as directed by your doctor, usually once daily.

  • If you are taking antacids or buffered forms of drugs (such as didanosine solution, didanosine enteric-coated capsules), take this medication at least 2 hours before or 1 hour after these medications.

Side effects:

Nausea may occur. If this effect persists or worsens, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.


Before taking Evotaz (Atazanavir /Cobicistat), tell your doctor or pharmacist if you are allergic to atazanavir; or to cobicistat; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.


Store away from heat, moisture, and light. Keep darunavir and cobicistat out of the reach of children and away from pets.


Evotaz (Atazanavir /Cobicistat) is a prescription drug and should be used under proper medical guidance and advice. The information provided here is for general educational purposes only and does not constitute medical or pharmaceutical advice which should be sought from qualified medical and pharmaceutical advisers.