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Common Brand Name(s): Reyataz
This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
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. It may be given with certain other medications (such as cobicistat, ritonavir) to increase ("boost") the levels of atazanavir. This helps atazanavir work better.
Atazanavir is not a cure for HIV infection. To decrease your risk of spreading HIV disease to others, continue to take all HIV medications exactly as prescribed by your doctor. Use an effective barrier method (latex or polyurethane condoms/dental dams) during sexual activity as directed by your doctor. Do not share personal items (such as needles/syringes, toothbrushes, and razors) that may have contacted blood or other body fluids. Consult your doctor or pharmacist for more details.
This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.
This product may also be used to lessen the risk of HIV infection after contact with the virus (for example, due to a needle stick). Ask your doctor for more details.
Read the Patient Information Leaflet if available from your pharmacist before you start taking atazanavir and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take this medication by mouth as directed by your doctor, usually once daily with food. Do not open, crush, or chew the capsules. Swallow the capsules whole.
If you are taking atazanavir with certain other medications (such as cobicistat, ritonavir), take them at the same time.
Since this medication may cause kidney problems, drink plenty of fluids during treatment to lower your risk.
The dosage is based on your medical condition, response to treatment, and other medications you may be taking. For children, the dosage is also based on weight. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). If you are directed to take ritonavir with this medication, take them both at the same time.
If you are taking antacids or buffered forms of drugs (such as didanosine solution, didanosine enteric-coated capsules), take atazanavir at least 2 hours before or 1 hour after these medications.
For the best effect, take this medication at evenly spaced times. To help you remember, take this medication at the same time every day.
It is very important to continue taking this medication (and other HIV medications) exactly as prescribed by your doctor. Do not skip any doses. Do not take more or less of this drug than prescribed or stop taking it (or other HIV medicines) even for a short time unless directed to do so by your doctor. Doing so may cause the amount of virus to increase, make the infection more difficult to treat (resistant), or worsen side effects.
Headache or nausea may occur. If either of these effects lasts or gets worse, tell your doctor or pharmacist promptly.
Remember that this medication has been prescribed because your doctor 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.
As your immune system gets stronger, it can begin to fight off infections you already had, possibly causing disease symptoms to come back. You could also have symptoms if your immune system becomes overactive. This reaction may happen at any time (soon after starting HIV treatment or many months later). Get medical help right away if you have any serious symptoms, including:
Tell your doctor right away if you have any serious side effects, including:
Changes in body fat may occur while you are taking this medication (such as increased fat in the upper back and stomach areas, decreased fat in the arms and legs). The cause and long-term effects of these changes are unknown. Discuss the risks and benefits of treatment with your doctor, as well as the possible use of exercise to reduce this side effect.
Get medical help right away if you have any very serious side effects, including:
Atazanavir can commonly cause a rash that is usually not serious. However, you may not be able to tell it apart from a rare rash that could be a sign of a severe reaction. Get medical help right away if you develop any rash.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including:
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
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:
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 heart problems such as a heart attack. Discuss the risks and benefits of treatment with your doctor and ways to lower your risk of heart disease. Tell your doctor if you have heart problems, if you smoke, or if you have other conditions that increase your risk of heart disease such as high blood pressure, diabetes, or high cholesterol/triglyceride levels.
Before having surgery, tell your doctors or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Atazanavir should not be given to children younger than 3 months because of the risk of very serious side effects.
Tell your doctor if you are pregnant before using this medication. Treatment can lower the risk of passing HIV infection to your baby. Discuss the risks and benefits with your doctor.
This medication passes into breast milk. Because breast milk can transmit HIV, do not breast-feed.
See also How to Use section.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include:
Other medications can affect the removal of atazanavir from your body, which may affect how atazanavir works. Examples include apalutamide, bosentan, efavirenz, etravirine, certain rifamycins (such as rifampin, rifapentine), certain drugs used to treat seizures (such as carbamazepine, phenobarbital, phenytoin, primidone), St. John's wort, among others.
Atazanavir can slow down the removal of other medications from your body, which may affect how they work. Examples of affected drugs include certain alpha blockers (such as alfuzosin, silodosin), certain benzodiazepines (midazolam, triazolam), ergot alkaloids (such as dihydroergotamine, ergotamine), irinotecan, lomitapide, pimozide, certain drugs to treat erectile dysfunction-ED or pulmonary hypertension (such as avanafil, sildenafil), certain "statin" cholesterol drugs (lovastatin, simvastatin), salmeterol, among others.
Prescription and nonprescription drugs to treat heartburn, indigestion, or ulcers (including H2 blockers such as famotidine, proton pump inhibitors such as lansoprazole/omeprazole) reduce stomach acid and decrease the absorption of atazanavir. This may prevent atazanavir from working well. Ask your doctor or pharmacist how to use these medications safely.
This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Talk to your doctor about additional or alternative reliable forms of birth control, and use an effective barrier method (latex or polyurethane condoms/dental dams) during sexual activity to decrease the risk of spreading HIV to others. Tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your hormonal birth control is not working well.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Alberta residents can call PADIS (Poison and Drug Information Service) 24 hours a day at 1-800-332-1414. Canada residents can call a provincial poison control center. Symptoms of overdose may include: severe dizziness, lightheadedness.
Do not share this medication with others.
Lab and/or medical tests (such as viral load, T-cell counts, kidney/liver function, cholesterol/triglyceride levels, blood sugar levels) should be done while you are taking this medication. Keep all medical and lab appointments. Consult your doctor for more details.
It is important not to miss doses of this drug. If you miss a dose, take it as soon as you remember, unless it is less than 6 hours until the next dose. In that case, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
If you have questions about missing a dose or you don't have more medication, contact your healthcare provider or pharmacist.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised December 2022.
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