Atripla is a combination antiviral medication that prevents human immunodeficiency virus (HIV) from reproducing in your body.

Atripla is used to treat HIV, the virus that can cause acquired immunodeficiency syndrome (AIDS). Atripla is not a cure for HIV or AIDS. Atripla is for use in adults and children who are at least 12 years old and weigh at least 88 pounds (40 kilograms).

Atripla may also be used for purposes not listed in this medication guide.

You should not take this medicine if you are allergic to efavirenz (Sustiva), emtricitabine (Emtriva), or tenofovir (Viread).

Do not take Atripla together with adefovir, atazanavir, voriconazole, or any medications that contain emtricitabine, lamivudine, or tenofovir (such as Combivir, Complera, Descovy, Epivir, Epzicom, Genvoya, Odefsey, Stribild, Trizivir, Truvada, Vemlidy).

Tell your doctor if you have ever had:

• liver or kidney disease;
• long QT syndrome;
• mental illness, use of antipsychotic medication, or injection drug use;
• epilepsy or other seizure disorder;
• low bone mineral density; or
• hepatitis B or C infection.

You may develop lactic acidosis, a dangerous build-up of lactic acid in your blood. This may be more likely if you have other medical conditions, if you've taken HIV medication for a long time, or if you are a woman. Ask your doctor about your risk.

Atripla can cause birth defects. Do not use if you are pregnant, and do not get pregnant for at least 12 weeks after you stop taking Atripla.

Atripla can make hormonal birth control less effective, including birth control pills, injections, implants, skin patches, and vaginal rings. To prevent pregnancy while using Atripla, use a barrier form of birth control: condom, diaphragm, cervical cap, or contraceptive sponge.

Women with HIV or AIDS should not breast-feed a baby. Even if your baby is born without HIV, the virus may be passed to the baby in your breast milk.

Use Efavirenz, Emtricitabine, And Tenofovir (Oral) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).

Mild symptoms of lactic acidosis may worsen over time, and this condition can be fatal. Get emergency medical help if you have: unusual muscle pain, trouble breathing, stomach pain, vomiting, irregular heart rate, dizziness, feeling cold, or feeling very weak or tired.

Call your doctor at once if you have:

• unusual thoughts or behavior, anger, severe depression, thoughts of hurting yourself or others, hallucinations;
• a seizure (convulsions);
• kidney problems--increased thirst and urination, muscle pain or weakness; or
• liver problems--swelling around your midsection, right-sided upper stomach pain, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Atripla affects your immune system, which may cause certain side effects (even weeks or months after you've taken this medicine). Tell your doctor if you have:

• signs of a new infection--fever, night sweats, swollen glands, cold sores, cough, wheezing, diarrhea, weight loss;
• trouble speaking or swallowing, problems with balance or eye movement, weakness or prickly feeling; or
• swelling in your neck or throat (enlarged thyroid), menstrual changes, impotence.

Common side effects may include:

• dizziness, drowsiness, tired feeling;
• nausea, diarrhea;
• headache, depressed mood, trouble concentrating;
• sleep problems (insomnia), strange dreams;
• rash; or
• changes in the shape or location of body fat (especially in your arms, legs, face, neck, breasts, and waist).

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.

Using this medicine will not prevent your disease from spreading. Do not have unprotected sex or share razors or toothbrushes. Talk with your doctor about safe ways to prevent HIV transmission during sex. Sharing drug or medicine needles is never safe, even for a healthy person.