This medicine is used for the following purposes:
Brand Name(s): Sustiva
Generic Name: Efavirenz
Instructions
Swallow the medicine without crushing or chewing it.
Take the medicine on an empty stomach.
Ask your doctor if any of your medicines need to be taken at the same time.
This medicine will work best if you take it at about the same time every day.
Keep the medicine at room temperature. Avoid heat and direct light.
This medicine does not stop the spread of viruses that are passed through the blood or during sex.
Always use condoms during sex.
Do not share needles or other personal objects such as shavers or toothbrushes.
It is important that you keep taking each dose of this medicine on time even if you are feeling well.
If you forget to take a dose on time, take it as soon as you remember. If it is almost time for the next dose, do not take the missed dose. Return to your normal schedule. Do not take 2 doses at one time.
Drug interactions can change how medicines work or increase risk for side effects. Tell your health care providers about all medicines taken. Include prescription and over-the-counter medicines, vitamins, and herbal medicines. Speak with your doctor or pharmacist before starting or stopping any medicine.
This medicine may decrease the effectiveness of some birth controls which use hormones (such as birth control pills and patches). Use an extra form of birth control, such as condoms, while on this medicine.
It is very important that you follow your doctor's instructions for all blood tests.
Cautions
Tell your doctor and pharmacist if you ever had an allergic reaction to a medicine.
Some patients taking this medicine have experienced serious side effects. Please speak with your doctor to understand the risks and benefits associated with this medicine.
Do not use the medication any more than instructed.
Your ability to stay alert or to react quickly may be impaired by this medicine. Do not drive or operate machinery until you know how this medicine will affect you.
Do not drink beverages with alcohol while on this medicine.
This medicine passes into breast milk. Ask your doctor before breastfeeding.
During pregnancy, this medicine should be used only when clearly needed. Talk to your doctor about the risks and benefits.
Do not take St. John's wort while on this medicine.
Do not share this medicine with anyone who has not been prescribed this medicine.
Always refill this medicine before it runs out.
Side Effects
The following is a list of some common side effects from this medicine. Please speak with your doctor about what you should do if you experience these or other side effects.
- agitated feeling or trouble sleeping
- loss of balance
- difficulty concentrating
- constipation or diarrhea
- coughing
- depression or feeling sad
- dizziness
- bad dreams
- lack of energy and tiredness
- headaches
- liver problems
- mood changes
- nervousness
- red, burning, or itchy skin
- stomach upset or abdominal pain
- blurring or changes of vision
- vivid dreams or nightmares
- vomiting
Call your doctor or get medical help right away if you notice any of these more serious side effects:
- change in behavior
- confusion
- fainting
- fever or chills
- swelling in the neck or throat
- hallucinations (unusual thoughts, seeing or hearing things that are not real)
- fast or irregular heart beats
- signs of liver damage (such as yellowing of eye or skin, dark urine, or unusual tiredness)
- loss of movement anywhere on the body
- muscle pain
- muscle trembling or weakness
- shortness of breath
- red, peeling or blistering skin
- slurred speech
- light colored stool
- suicidal thoughts
- difficulty swallowing
- unsteadiness while walking
- severe or persistent vomiting
A few people may have an allergic reaction to this medicine. Symptoms can include difficulty breathing, skin rash, itching, swelling, or severe dizziness. If you notice any of these symptoms, seek medical help quickly.
Please speak with your doctor, nurse, or pharmacist if you have any questions about this medicine.
IMPORTANT NOTE: This document tells you briefly how to take your medicine, but it does not tell you all there is to know about it. Your doctor or pharmacist may give you other documents about your medicine. Please talk to them if you have any questions. Always follow their advice.
There is a more complete description of this medicine available in English. Scan this code on your smartphone or tablet or use the web address below. You can also ask your pharmacist for a printout. If you have any questions, please ask your pharmacist.
The display and use of this drug information is subject to Terms of Use.
More information about EFAVIRENZ - ORAL
Copyright(c) 2023 First Databank, Inc.
Selected from data included with permission and copyright by First DataBank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use.
Conditions of Use: The information in this database is intended to supplement, not substitute for the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment. The display and use of this drug information is subject to express Terms of Use.
