April 28, 2017
Recommended Topic Related To:


"The child known as the “Mississippi baby””an infant seemingly cured of HIV that was reported as a case study of a prolonged remission of HIV infection in The New England Journal of Medicine last fall”now has detectable levels of HIV after "...



(atazanavir) Capsules and Oral Solution


The active ingredient in REYATAZ capsules and oral powder is atazanavir sulfate, which is an HIV-1 protease inhibitor.

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) 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 of 150 mg, 200 mg, or 300 mg of atazanavir, which are equivalent to 170.8 mg, 227.8 mg, or 341.69 mg of atazanavir sulfate, respectively.The capsules also contain the following inactive ingredients: crospovidone, lactose monohydrate, and magnesium stearate. The capsule shells contain the following inactive ingredients: gelatin, FD&C Blue No. 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 No. 2, isopropyl alcohol, ammonium hydroxide, propylene glycol, n-butyl alcohol, simethicone, and dehydrated alcohol.

REYATAZ oral powder comes in a packet containing 50 mg of atazanavir equivalent to 56.9 mg of atazanavir sulfate in 1.5 g of powder. The powder is off-white to pale yellow and contains the following inactive ingredients: aspartame, sucrose, and orange-vanilla flavor.

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: 6/16/2014
This monograph has been modified to include the generic and brand name in many instances.

Reyataz - User Reviews

Reyataz User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Reyataz sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

WebMD Daily

Get breaking medical news.