Sustiva (efavirenz) is an antiviral medication that prevents human immunodeficiency virus (HIV) from multiplying in your body.
Sustiva is used to treat hiv, the virus that can cause acquired immunodeficiency syndrome (AIDS).
Sustiva is not a cure for HIV or AIDS.
Do not take Sustiva together with Atripla (combination efavirenz, emtricitabine, and tenofovir), unless your doctor tells you to.
Do not take Sustiva with cisapride (Propulsid), pimozide (Orap), midazolam (Versed), triazolam (Halcion), or ergot medicines such as dihydroergotamine (D.H.E. 45), ergonovine (Ergotrate), ergotamine (Ergomar, Cafergot, Wigraine), or methylergonovine (Methergine). These drugs can cause life-threatening side effects if you use them while you are taking Sustiva.
Sustiva may cause serious psychiatric symptoms including confusion, severe depression, suicidal thoughts, aggression, extreme fear, hallucinations, or unusual behavior. Contact your doctor at once if you have any of these side effects, even if you have had them before.
Do not use Sustiva without telling your doctor if you are pregnant. It could harm the unborn baby. Use two forms of birth control, including a barrier form (such as a condom or diaphragm with spermicide gel) while you are taking this medicine, and for at least 12 weeks after your treatment ends. Tell your doctor if you become pregnant during treatment.
Taking Sustiva will not prevent you from passing HIV to other people. Talk with your doctor about safe methods of preventing HIV transmission during sex. Sharing drug or medicine needles is never safe, even for a healthy person.
Before taking this medicine
You should not use Sustiva if you have ever had a severe allergic reaction to efavirenz.
Some medicines can cause unwanted or dangerous effects when used with Sustiva. Your doctor may need to change your treatment plan if you use any of the following drugs:
midazolam, pimozide, St. John's wort; or
ergot medicine - dihydroergotamine, ergotamine, ergonovine, methylergonovine.
Using any of these medicines while you are taking Sustiva can cause serious medical problems or death.
To make sure Sustiva is safe for you, tell your doctor if you have:
liver disease (including hepatitis B or C);
seizures or epilepsy;
a history of mental illness, injection drug use, or taking an anti-psychotic medicine;
high cholesterol or triglycerides; or
if you have ever taken delavirdine (Rescriptor) or nevirapine (Viramune) and they were not effective in treating your condition.
Do not use Sustiva if you are pregnant. It could harm the unborn baby. Use two forms of birth control, including a barrier form (such as a condom or diaphragm with spermicide gel) while you are taking Sustiva, and for at least 12 weeks after your treatment ends. Tell your doctor if you become pregnant during treatment.
Hormonal contraception (birth control pills, injections, implants, skin patches, and vaginal rings) may not be effective enough to prevent pregnancy during your treatment.
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.
How should I take Sustiva?
Take Sustiva exactly as prescribed by your doctor. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Take Sustiva on an empty stomach at bedtime, unless your doctor tells you otherwise.
To make swallowing easier, you may open the Sustiva capsule and sprinkle the medicine into a spoonful of applesauce, yogurt, or grape jelly. You may also mix the medicine with infant formula if you are giving the medicine to a baby too young for solid foods. Swallow right away without chewing. Do not save the mixture for later use.
After taking Sustiva using the sprinkle method, do not eat for the next 2 hours. If you have given this medicine mixture to a baby, do not feed infant formula for at least 2 hours.
This medicine comes with patient instructions for mixing the capsule contents with soft food or infant formula. Follow these directions carefully. Ask your doctor or pharmacist if you have any questions.
If a child is using this medicine, tell your doctor if the child has any changes in weight. Sustiva doses are based on weight in children, and any changes may affect your child's dose.
While using Sustiva, you may need frequent blood tests.
Take Sustiva regularly to get the most benefit. Get your prescriptions refilled before you run out of medicine completely. Skipping doses may increase the risk of your virus becoming resistant to antiviral medicine.
HIV/AIDS is usually treated with a combination of drugs. Do not take Sustiva as your only HIV medication. Your disease may become resistant to efavirenz if you do not take it in combination with other HIV medicines your doctor has prescribed. Do not change your doses or medication schedule without advice from your doctor. Every person with HIV or AIDS should remain under the care of a doctor.
This medicine can cause you to have a false positive drug screening test. If you provide a urine sample for drug screening, tell the laboratory staff that you are taking Sustiva.
Store at room temperature away from moisture and heat.