Revia (Naltrexone)

Name: Revia
Brand: Teva
SKU: 1981
Availability: InStock

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

Type:

Product: Revia

Manufacturer: Teva

Country: Canada

Dosage: 50 mg

Qty-Price (USD):

Generic Equivalent of Revia

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

Type:

Product: Naltrexone

Manufacturer: Generic

Country: Canada

Dosage: 50 mg

Qty-Price (USD):

Revia Information

medically reviewed by Carol Hou (BSc. Pharm) on July 31, 2025.

A licensed pharmacist (Licensed Community Pharmacies Directory | College of Pharmacists of British Columbia) with over 20 years of experience in medication management, specifically medication safety, she has reviewed the information for accuracy and completeness.

Revia and Naltrexone Hydrochloride at CanadaPharmacyOnline

Revia (naltrexone hydrochloride) is manufactured by Teva Pharmaceuticals in Canada (at this pharmacy).

Generic naltrexone is sourced from manufacturers that meet applicable regulatory standards for safety, efficacy, and quality. The specific manufacturer of your dispensed medication may vary.

Important Information about Generic Naltrexone:

Generic naltrexone contains the same active ingredient as brand-name Revia and is required to meet the same safety, effectiveness, and quality standards. This means it is designed to work in the same way as Revia. However, the FDA advises that while generic medications are bioequivalent, individual responses can vary. Talk to your doctor or pharmacist if you have any questions about using generic naltrexone.

For more information about generic drug approval and bioequivalence, please visit Access to Generic Drugs in Canada | Canada.ca.

Dosage:

Revia and the generic alternative, naltrexone hydrochloride, are available in 50 mg oral tablets at this pharmacy.

Your doctor will determine the appropriate dose based on your individual needs and medical conditions.

Usage:

Naltrexone is a prescription medication used to treat opioid-use disorder (OUD), helping the patient to stay drug-free and maintain their recovery. It is also used to treat alcohol use disorder (AUD) by reducing the urge to drink alcohol and the enjoyment derived from drinking. It is part of an overall treatment program that may include counselling and support. For opioid dependence, patients must be opioid-free for 7-10 days before starting naltrexone to avoid withdrawal symptoms. A naloxone challenge test may be performed to ensure the absence of opioids in the system.

For more information, please refer to SAMHSA - Substance Abuse and Mental Health Services Administration (.gov), https://www.samhsa.gov/substance-use/treatment/options/naltrexone.

Mechanism of Action:
Revia (naltrexone hydrochloride) is a pure opioid antagonist. It blocks the effects of opioids by binding to opioid receptors in the brain, thereby preventing or reducing the euphoric and other subjective effects of opioids. The mechanism by which naltrexone reduces alcohol consumption is not fully understood. However, it is thought to involve the modulation of the endogenous opioid system. By blocking opioid receptors, naltrexone may reduce the rewarding effects of alcohol and decrease cravings.

Take Revia exactly as your doctor prescribes and never stop taking it without their direct instruction, following the instructions in the highlights of prescribing information. Regular attendance at counselling sessions or support groups is usually recommended to enhance Revia's effectiveness. Consult your doctor for personalized guidance and safe use.

The information below summarizes some, but not all, potential side effects, risks, and interactions. Before taking Revia, discussing all possible side effects, risks, and interactions with your doctor or pharmacist is essential.

Side Effects:

The information below is a partial list of side effects; individual reactions can vary. Before starting Revia, it is crucial to discuss potential side effects and risks with your doctor or pharmacist.

Common side effects – These are examples of some common side effects of Revia, but others are possible. Contact your doctor promptly if any side effects are persistent, worsening, or concerning, or if you experience any other concerning symptoms.
• Abdominal cramping or pain (mild to moderate)
• Anxiety
• Cramps
• Decreased appetite
• Dizziness
• Drowsiness
• Headache
• Insomnia or trouble sleeping
• Irritability
• Joint or muscle pain
• Light-headedness
• Nausea or vomiting
• Nervousness
• Runny nose
• Skin rash (mild)
• Sweating
• Thirst
• Unusual tiredness

Serious or rare side effects – Stop taking Revia and seek immediate medical attention right away if you experience any of the following symptoms:
• Allergic reactions, including rash, itching, swelling of the face, lips, tongue, or throat, and trouble breathing
• Cardiac issues (e.g., chest pain, palpitations)
• Changes in mood, including depression or thoughts of suicide (and suicidal attempts)
• Confusion
• Dark urine
• Hallucinations
• Hearing problems or tinnitus
• Hepatotoxicity (severe liver damage), indicated by yellowing of the eyes or skin, or dark urine
• Opioid overdose/fatal overdose (if large doses of opioids are taken to try to overcome naltrexone's blockade)
• Pneumonia or other respiratory symptoms
• Severe abdominal pain
• Severe nausea, vomiting, or diarrhea
• Vision disturbances (e.g., blurred vision)

Contraindications:

This is not an exhaustive list of contraindications. It is crucial to discuss all your medical conditions, past and present, and all medications you are taking with your doctor or pharmacist before starting Revia.

Revia should not be used if:
• You are currently using opioid medications.
• You are physically dependent on opioids or are experiencing opioid withdrawal symptoms.
• You have tested positive for opioids in a urine screen.
• You have failed a naloxone challenge test.
• You have acute hepatitis or liver failure.
• You are allergic to naltrexone or any of its ingredients.

Tell your doctor about all of your medical conditions, past and present, before starting Revia. This is crucial because certain conditions can affect whether Revia is right for you. These conditions may include, but are not limited to:
• Any pain condition (especially if you anticipate needing pain medication)
• Bleeding disorders, such as hemophilia
• Breastfeeding
• Current or recent opioid use
• Depression or other mental health conditions
• History of seizures or epilepsy
• History of severe allergic reactions to naltrexone or any component
• Kidney disease
• Liver disease
• Pregnancy

Anesthesia and Surgery:
Inform your doctors that you are taking Revia before any surgery or medical procedures, as it can affect how you respond to anesthesia and pain medications.

Dizziness and Drowsiness:
Revia may cause dizziness or drowsiness. Do not drive, operate machinery, or engage in activities that require alertness until you know how it affects you.

Drug Interactions:

Before taking Revia, it is essential to discuss all potential risks and interactions with your doctor or pharmacist. For complete and up-to-date information, please visit Details for Revia - Drug and Health Products Portal at https://dhpp.hpfb-dgpsa.ca/dhpp/resource/43143.

Provide your doctor with a complete list of all your medications, including prescriptions, over-the-counter (OTC) drugs, vitamins, and herbal supplements. Revia can interact with several medications, including (but not limited to) opioid-containing medications (such as cough and cold remedies, pain relievers, and antidiarrheals), certain medications for mental health conditions (such as thioridazine, which can lead to drowsiness and lethargy), and other opioid antagonists/agonists (like buprenorphine/naloxone combinations). Using opioid medications while taking Revia can lead to opioid withdrawal symptoms, and attempting to overcome the blockade by taking large doses of opioids can result in a fatal opioid overdose. Additionally, caution is advised with other hepatotoxic drugs (medications that can damage the liver), as this may increase the risk of liver problems.

Pregnancy and Breastfeeding:

Revia should only be used during pregnancy if the potential benefits outweigh the risks to the fetus. Naltrexone does pass into breast milk. Women who are pregnant or breastfeeding should discuss the risks and benefits with their doctor.

Frequently Asked Questions about Revia at Canada Pharmacy Online:

Why is Revia more affordable in Canada than in the United States?

Prescription drug prices, including Revia, are generally lower in Canada than in the US due to a combination of factors, primarily government price regulations, differing market dynamics, and other economic considerations. In Canada, provincial and federal governments negotiate drug prices with pharmaceutical companies, which often results in lower costs compared to the US, where market forces play a more significant role. For more information, see the FAQs on Prescription Drug Importation from the Kaiser Family Foundation (KFF): https://www.kff.org/health-costs/issue-brief/faqs-on-prescription-drug-importation/

Can I take Revia with food?

Revia can be taken with or without food. However, taking it with food may help to reduce stomach upset. Follow your doctor’s instructions.

Can I crush or chew Revia tablets?

Revia tablets should be swallowed whole. Do not crush or chew them. If you have difficulty swallowing pills, consult your doctor or pharmacist.

Will Revia cure my alcohol or opioid dependence?

Revia is not a cure for alcohol or opioid dependence. It is used to help manage these conditions by reducing cravings and blocking the effects of opioids, supporting abstinence as part of a comprehensive treatment program.

How quickly does Revia start working?

Revia begins to block the effects of opioids within 1 to 2 hours. Its impact on alcohol cravings may take longer and is part of a longer-term treatment strategy.

What should I do if I miss a dose of Revia?

If you miss a dose of Revia, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one.

How much is the shipping?

Our shipping fee is a flat rate of $10.00 per order. Our pharmacy focuses on getting you the lowest prices on high-quality products.

How do I order from your pharmacy?

Ordering from us is very simple. You can purchase online or call Customer Service at 1866.920.3784; for more information or to learn about the ordering process, visit our How to Order page.

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The information on this page is sourced from independent third parties contracted by CanadaPharmacyOnline. While we cannot guarantee its medical accuracy, we strongly recommend consulting a healthcare professional for personalized advice regarding medications or medical conditions.

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