Can I place an order without a prescription?

No. A telemedicine evaluation is required. Prescriptions are issued only when clinically appropriate.

Can you send my e‑prescription to a local pharmacy instead of delivery?

Yes. Tell your clinician your preferred pharmacy during the visit.

How do I rewrite/renew a prescription?

Use the Refill page to request a review. Your clinician will confirm safety, dosing, and timing.

How fast is shipping?

Most approved orders ship with tracking and typically arrive in 2–5 business days.

Do you prescribe controlled substances via telemedicine?

Generally no. We prioritize safer alternatives and coordinate in‑person care when required by safety or regulations.

Where can I read independent information about medications?

See NIH MedlinePlus, official labeling on NIH DailyMed, and approvals/history on the FDA Drugs@FDA database.

Online Revia (Naltrexone)

Neurology & Migraine • Educational only; not medical advice. Prescriptions at clinician discretion.

On this page: Overview FAQ Gov/NIH

Overview

Naltrexone, sold as Revia (oral) and Vivitrol (injectable), is an opioid-receptor antagonist used in addiction medicine. Introduced in the 1980s, it blocks the euphoric and sedative effects of opioids and reduces alcohol craving.

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Uses

Approved for opioid-dependence maintenance therapy after detoxification and for alcohol-dependence relapse prevention. It may also aid impulse-control disorders such as gambling addiction.

Dosage & Administration

Standard oral dose: 50 mg once daily. Injectable extended-release formulation delivers 380 mg intramuscularly monthly. Patients must be opioid-free for at least 7–10 days before starting to avoid precipitated withdrawal.

Side Effects & Warnings

Common: nausea, headache, fatigue, and insomnia. Serious: hepatotoxicity at high doses and precipitated withdrawal if opioids are still in the body. Contraindicated in acute hepatitis or liver failure.

Patient Considerations

Liver-function monitoring is essential. Carry medical ID indicating naltrexone therapy in case pain management is needed, as opioids will be ineffective.

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Frequently asked questions

Can Revia stop alcohol cravings immediately?

Craving reduction develops gradually over several days to weeks.

Is it safe to drink while on Revia?

Drinking while taking naltrexone lessens euphoria but can still harm the liver—avoid alcohol initially.

Can I use painkillers while on Revia?

Non-opioid analgesics like acetaminophen or NSAIDs are suitable; opioids will not work.

Government / NIH sources

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