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REYATAZ®
(atazanavir sulfate)

DRUG DESCRIPTION

REYATAZ® (atazanavir sulfate) is an azapeptide inhibitor of HIV-1 protease.

The chemical name for atazanavir sulfate is (3S,8S,9S,12S)-3,12-Bis(1,1-dimethylethyl)-8hydroxy-4,11-dioxo-9-(phenylmethyl)-6-[[4-(2-pyridinyl)phenyl]methyl]-2,5,6,10,13pentaazatetradecanedioic acid dimethyl ester, sulfate (1:1). Its molecular formula is C38H52N6O7•H2SO4, which corresponds to a molecular weight of 802.9 (sulfuric acid salt). The free base molecular weight is 704.9. Atazanavir sulfate has the following structural formula:

REYATAZ®  (atazanavir sulfate) Structural Formula Illustration

Atazanavir sulfate is a white to pale yellow crystalline powder. It is slightly soluble in water (4–5 mg/mL, free base equivalent) with the pH of a saturated solution in water being about 1.9 at 24 ± 3° C.

REYATAZ Capsules are available for oral administration in strengths containing the equivalent of 100 mg, 150 mg, 200 mg, or 300 mg of atazanavir as atazanavir sulfate and the following inactive ingredients: crospovidone, lactose monohydrate, and magnesium stearate. The capsule shells contain the following inactive ingredients: gelatin, FD&C Blue #2, titanium dioxide, black iron oxide, red iron oxide, and yellow iron oxide. The capsules are printed with ink containing shellac, titanium dioxide, FD&C Blue #2, isopropyl alcohol, ammonium hydroxide, propylene glycol, n-butyl alcohol, simethicone, and dehydrated alcohol.

What are the possible side effects of atazanavir (Reyataz)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop taking atazanavir and call your doctor at once if you have a serious side effect such as:

  • severe dizziness, fast or pounding heartbeats, feeling like you might pass out;
  • severe pain in your side or lower back, painful urination, blood in your urine;
  • easy bruising or bleeding, signs of a new infection such as fever or chills, cough, or flu symptoms;
  • jaundice (yellowing of the skin or...

Read All Potential Side Effects and See Pictures of Reyataz »

What are the precautions when taking atazanavir sulfate (Reyataz)?

Before taking atazanavir, tell your doctor or pharmacist if you are allergic to it; 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.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver problems (including hepatitis B or C infections), kidney problems (including kidney stones), heart problems (such as heart rhythm problems, irregular heartbeat, coronary artery disease, heart attack), diabetes, a certain bleeding problem (hemophilia).

Atazanavir may increase the level of cholesterol and fats (triglycerides) in your blood. HIV infection can also cause this effect. This could increase your risk for...

Read All Potential Precautions of Reyataz »

Last reviewed on RxList: 3/5/2012
This monograph has been modified to include the generic and brand name in many instances.