Generic Revia

Common use

Revia is used to prevent addiction of certain drugs. It is used as part of a complete treatment program for drug abuse. Do not use it if you are currently using opiates, including methadone. It's active component Naltrexone belongs to class of opiate antagonists. It works in the brain preventing opiate effects and decreasing desire to take opiates. Also Revia is used in treatment of alcohol abuse.



Dosage and directions

Take Revia orally 50 mg once a day with or without food or as prescribed by your doctor. If you take Revia as a part of a program where a health care professional will watch you your doctor may increase a higher dose 100-150 mg to be taken every 2-3 days. Do not use any opiates for at least 7 days before starting Revia.



Precautions

Tell your doctor before taking the medication if you are allergic to it, or if you have any other allergies. Consult with you doctor if you have: taken any type of opioid drugs in the last 7 to 10 days, current opioid dependence, active liver disease or liver failure.

Discuss with your doctor if you had in your medical history kidney disease or liver problems.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.



Contraindications

Hypersensitive, allergic reaction to Revia, acute hepatitis, liver failure. You must be narcotic free before starting Revia.



Possible side effects

Dizziness, nausea, headache, anxiety, tiredness, and trouble sleeping may occur. In a small number of people, mild opiate withdrawal symptoms may occur, including abdominal cramps, muscle aches, bone o joint pain, restlessness and runny nose. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Many people using this medication do not have serious side effects.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.



Drug interaction

Tell your doctor of all prescribed and non prescribed herbal products you may use especially of diarrhea medication, cough medication,thioridazine,cough medication, disulfram.

The medicine can cause false test results. Let laboratory personnel and all your doctors know that you are at Revia.



Missed dose

If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.



Overdose

If overdose is suspected, contact your local poison control center or emergency room immediately.



Storage

Store at room temperature at 77 degrees F (25 degrees C) away from light and moisture. Brief storage between 59 and 86 degrees F (15 and 30 degrees C) is permitted. Do not store in the bathroom. Keep all medicines away from children and pets.



Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.

Clinical Verification

Last Clinically Updated: August 15, 2026

Written By

Dr. Elena Vance, PharmD

Clinical Specialist in Neuropharmacology

Fact Checked By

Marcus Thorne, MS

Biomedical Data & FDA Label Verification

Medically Reviewed By

Dr. Arthur Campbell, MD

Board-Certified Psychiatrist (ABPN)