Generic Revia (Naltrexone)

Common Use
Revia is an opioid antagonist used as part of a complete treatment program to help prevent relapse in drug or alcohol dependence. It works by blocking the euphoric and sedative effects of opioids and reducing the craving for alcohol or narcotics.

• It is not effective if opioids are currently being used, including methadone.

• Revia is also prescribed for the treatment of alcohol dependence.

Dosage and Administration

• The usual adult dose is 50 mg once daily, with or without food.

• In supervised programs, higher doses (e.g., 100–150 mg) may be taken every 2–3 days as directed by a physician.

• You must be opioid-free for at least 7–10 days before starting Revia to avoid acute withdrawal symptoms.

• Always follow your doctor’s instructions precisely.

Precautions
Before using Revia, inform your doctor if you:

• Are allergic to naltrexone or other medications

• Have used opioids (including prescription painkillers, heroin, or methadone) in the last 7 to 10 days

• Have liver disease or hepatitis

• Have a history of kidney problems

Pregnancy and breastfeeding:

• Use only if clearly needed and prescribed by your doctor. Discuss the potential risks and benefits with your healthcare provider.

Contraindications
Do not use Revia if you have:

• Hypersensitivity to naltrexone

• Acute hepatitis or liver failure

• Current narcotic use or opioid dependence (can cause sudden and severe withdrawal)

Possible Side Effects

Common side effects include:

• Nausea

• Headache

• Dizziness

• Anxiety or nervousness

• Trouble sleeping

• Fatigue

Some patients may experience mild withdrawal-like symptoms:

• Muscle or joint pain

• Abdominal cramps

• Restlessness

• Runny nose

Seek medical help immediately for severe side effects such as:

• Allergic reactions (rash, itching/swelling, severe dizziness, breathing difficulty)

• Liver problems (e.g., yellowing of skin/eyes, dark urine)

Drug Interactions
Tell your doctor about all medications, supplements, or herbal products you use—especially:

• Opioid medications

• Disulfiram (used for alcohol dependence)

• Thioridazine

• Cough and diarrhea medications that may contain opioids

Note: Revia may interfere with lab test results. Inform your doctor and lab personnel that you are taking it.

Missed Dose

• Take as soon as you remember.

• If it’s close to your next dose, skip the missed dose—do not double to catch up.

• Resume your normal schedule.

Overdose
If you suspect an overdose, seek emergency medical attention or contact a poison control center immediately.

Storage

• Store at room temperature (77°F or 25°C)

• Brief storage between 59–86°F (15–30°C) is allowed

• Keep away from light, moisture, and heat

• Do not store in the bathroom

• Keep out of reach of children and pets

Disclaimer
This information is for general knowledge only and does not include all possible uses, precautions, or side effects. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your doctor or healthcare provider for individualized care. We are not responsible for consequences arising from self-treatment or reliance on this content.