Understanding Revia and Its Role in Addiction Treatment

Revia is a prescription medication whose active ingredient is naltrexone hydrochloride. It is approved by Health Canada for helping people manage alcohol dependence by reducing cravings and, in some individuals, decreasing the likelihood of heavy drinking episodes. It is also prescribed as part of a structured program for people recovering from opioid dependence, where it works by blocking the effects of opioids such as heroin, morphine, or certain pain medications.

Naltrexone is not a cure for addiction. It is most effective when used along with comprehensive treatment, including counselling, social support, and lifestyle changes. Revia is intended for patients who have already gone through detoxification and are motivated to avoid return to substance use. In Canada, it can only be obtained with a valid prescription from a licensed healthcare professional.

Revia tablets are one brand of naltrexone. A generic version is also widely available in Canada and contains the same active ingredient. Both require the same prescription status and medical oversight. The medication is not a substitute for professional addiction care but can be a valuable tool in a long-term recovery plan.

How Naltrexone Helps Control Cravings

Naltrexone works by attaching itself to the same receptors in the brain that alcohol and opioids would normally activate. When it occupies these mu‑opioid receptors, it prevents other substances from producing their usual pleasurable or reinforcing effects. For someone who drinks alcohol, naltrexone can diminish the rewarding sensations and reduce the urge to keep drinking.

In the case of opioid dependence, the blockade is more direct. If an opioid is taken while naltrexone is active, the user will not experience the euphoria or sedation typically sought. This helps remove the incentive to use opioids and supports a person’s commitment to abstinence. The medication does not cause any high itself and is not sedating.

The benefit of naltrexone is thought to build over time: by repeatedly consuming a substance without the expected reward, the brain’s learned associations weaken. Importantly, naltrexone does not produce physical dependence, meaning that stopping it does not cause withdrawal symptoms. Patients do not develop tolerance or need increasing doses.

Forms, Strengths, and General Dosing Information

Revia is supplied as oral tablets containing 50 mg of naltrexone hydrochloride. This is the standard strength used in addiction medicine. The tablet is taken by mouth, either once daily or according to a schedule determined by the treating physician. Sometimes a higher dose—100 mg every other day or 150 mg every third day—may be recommended, always under careful supervision.

A critical safety measure: a person must be completely free of opioids for a minimum of 7 to 10 days before starting Revia. If naltrexone is introduced while opioids are still present in the body, it can displace them from receptors and trigger an abrupt, severe withdrawal syndrome. A doctor will usually verify this through a urine test or a naloxone challenge before writing the first prescription.

Dosing should always be tailored to the individual, and regular follow‑up appointments allow the prescriber to monitor progress and check for possible side effects. Because naltrexone can affect liver function at doses far above those typically prescribed, some physicians order baseline liver enzyme tests and periodic retests during long‑term use. This is a precaution, not an expected problem at standard doses.

Before beginning treatment, it is wise to discuss your medical history with your doctor or pharmacist. They can confirm whether Revia is suitable for you and answer questions about how it fits into your overall recovery plan.

Safety Information: Side Effects, Precautions, and Overdose

The most commonly reported side effects of naltrexone tend to be mild and often diminish after the first few weeks. They include:

• Nausea
• Headache
• Dizziness
• Fatigue
• Joint and muscle aches
• Trouble sleeping or anxiety

Nausea is particularly frequent when starting treatment and can be managed by taking the tablet with food or occasionally splitting the dose under a doctor’s guidance.

Although rare, more serious adverse effects have been reported, including signs of liver irritation (dark urine, yellowing of the skin, persistent abdominal pain), severe allergic reactions, or mood changes such as depression or thoughts of self‑harm. Anyone noticing these symptoms should stop the medication and contact a healthcare provider immediately. People with a history of significant liver disease, acute hepatitis, or allergy to naltrexone should not take Revia.

Revia is contraindicated in anyone who is currently using opioids or in a state of acute opioid withdrawal. Doing so can precipitate dangerous withdrawal symptoms. It is also not approved for use in individuals under 18 years of age, although in rare cases a specialist may consider it off‑label. Women who are pregnant or breastfeeding should discuss risks and benefits with their doctor.

Naltrexone does not reduce the intoxicating effects of alcohol. You must not drive or operate machinery after drinking alcohol while on Revia. Combining naltrexone with alcohol will not cause a disulfiram‑like reaction; rather, you will still become impaired but may feel less euphoric. Overdose on naltrexone itself is uncommon, but very high doses can cause severe nausea. If a person overdoses on opioids after stopping naltrexone—when tolerance has dropped sharply—fatal respiratory depression can occur. Seek immediate medical help in any suspected overdose situation.

What Else You Should Know About Revia

Naltrexone was first synthesized in the 1960s and received initial approval from the U.S. Food and Drug Administration in 1984 for treating opioid addiction. Its effectiveness for alcohol dependence gained later recognition, and today it remains one of the few oral medications specifically indicated for alcohol use disorder. Health Canada has approved naltrexone for both indications under strict prescribing guidelines.

After swallowing a 50 mg tablet, naltrexone itself is cleared from the bloodstream fairly quickly, but a major active metabolite called 6‑beta‑naltrexol continues to block opioid receptors for approximately 24 to 72 hours. This extended blockade is what makes once‑daily dosing practical. The precise duration of receptor coverage can vary slightly from person to person, but the standard once‑daily schedule is well supported by clinical experience.

Unlike many medications used in pain management or anxiety, naltrexone carries no risk of addiction. Patients do not experience euphoria from taking it and do not develop physical dependence. Discontinuation after long‑term use does not trigger withdrawal symptoms, making it a safe long‑term option for those who benefit from it.

Although Revia is a well‑established brand, generic naltrexone tablets are equally effective and often more affordable. In Canada, a long‑acting injectable form of naltrexone (marketed as Vivitrol) is also available for patients who prefer a monthly injection instead of daily tablets. Other medications, such as acamprosate (Campral) or disulfiram for alcohol dependence and buprenorphine/naloxone for opioid dependence, represent therapeutic alternatives that may be considered based on the individual’s clinical picture and treatment goals.

Revia tablets should be stored at room temperature, away from direct light, moisture, and extreme heat. Keep the container tightly closed and out of the sight and reach of children. Do not use the tablets past the expiry date printed on the packaging.

Ordering Revia Through Our Licensed Canadian Pharmacy

Revia is a prescription medicine in every Canadian province and territory. You cannot order it without a valid prescription from a practitioner licensed in Canada. Our pharmacy adheres to all regulations set by Health Canada and the relevant provincial college of pharmacists, so every order is reviewed by a qualified pharmacist before dispensing.

To place an order for Revia, the typical process is:

1. Obtain a prescription from your family doctor, an addiction medicine specialist, or a walk‑in clinic physician.
2. Visit our secure website and select Revia or its generic equivalent. During checkout, you will be prompted to upload a clear image of your prescription.
3. If you do not yet have a prescription, some provinces allow an online assessment with a licensed Canadian prescriber through our telehealth partner. Eligibility will be confirmed before you proceed.
4. Once the prescription is verified, a pharmacist dispenses the exact product and dose. Your medication is then packaged discreetly and shipped through an insured courier service.

Throughout the process, our support team can answer questions and help you track your order.

Delivery typically takes 2 to 5 business days, depending on your location in Canada. We ship to addresses in all provinces. For safety and regulatory reasons, a signature may be required upon delivery, especially for controlled substances. Every shipment includes plain outer packaging to protect your privacy.

Should you have any concerns about the medication, dosage instructions, or potential interactions with other therapies you are receiving, our pharmacists are available for a confidential consultation either by phone or secure message before you finalize your order.

Why Choose Our Online Pharmacy for Your Prescription Needs

Our pharmacy is fully licensed in Canada and regularly inspected by the provincial regulatory authority. This means every prescription is handled with the same standards of care you would expect from a brick‑and‑mortar community pharmacy. Your health information is protected under Canadian privacy legislation, and we never share your data without your consent.

We strive to offer competitive pricing for Revia and generic naltrexone. While prices vary based on quantity and any applicable insurance, a month’s supply of generic 50 mg tablets typically falls in a range of roughly $60 to $90 CAD when ordered online through a licensed provider. Final costs may be lower if you are enrolled in a provincial drug plan or have private coverage. Our pricing structure is transparent, with no hidden fees added during checkout.

Ordering through our website means you avoid travel time and pharmacy lineups. Your medication comes directly to your door in discreet packaging, supporting both convenience and confidentiality. We believe that managing a sensitive health matter like addiction recovery should not involve unnecessary stress.

We also offer ongoing support. If you need to reorder, modify a standing prescription, or ask a drug‑related question, our customer‑care team and clinical pharmacists are easy to reach. Many Canadians turn to licensed online pharmacies for the combination of authenticity, affordability, and reliable service—all of which we are committed to providing.

Every Revia tablet we dispense originates from Health Canada–approved manufacturers, so you can be confident in the quality of the medication you receive. Our pharmacists verify each shipment against your prescription, and we maintain full documentation. Your trust is central to our practice.

Frequently Asked Questions

What is the typical price of Revia in Canada?

The price of Revia may vary depending on the dosage strength and the pharmacy you choose. In Canada, licensed pharmacies typically offer competitive pricing. For the most current information, we recommend checking our price list or contacting us directly.

Do I need a prescription to obtain Revia in Canada?

Yes, Revia is classified as a prescription-only medication in Canada. You must have a valid prescription from a recognized Canadian healthcare provider. Our pharmacy requires a prescription before we can dispense this medication.

Is it safe to drink alcohol while taking Revia?

Revia does not cause a severe physical reaction if you consume alcohol, unlike some other medications. However, drinking alcohol during addiction treatment is generally not recommended, as it may reduce the effectiveness of the therapy and increase the risk of relapse.

When can I expect to notice the effects of Revia?

Many individuals start to feel a reduction in cravings within the first week of consistent use, but the full effect can take several weeks. The onset may vary depending on your body’s response and whether you are using it for alcohol or opioid dependence. Patience and adherence to your prescribed schedule are important.

Can Revia lead to dependence or addiction?

Revia is not considered habit-forming and does not produce euphoria or a ‘high.’ It is a medication that blocks opioid receptors rather than activating them, so it has no addictive potential when used as prescribed.

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

If you forget to take a dose, take it as soon as you remember unless it is almost time for your next scheduled dose. In that case, skip the missed dose and resume your regular timing. Do not take a double dose to make up for a missed one.

How long will I need to continue taking Revia?

The duration of treatment depends on your individual recovery plan and the recommendation of your healthcare provider. Some people take Revia for several months or longer as part of a comprehensive addiction management program. Your doctor will advise on when to stop.

Does Revia interact with common over-the-counter pain medications such as ibuprofen or acetaminophen?

Revia is generally safe to use with non-opioid pain relievers like ibuprofen or acetaminophen. However, you should avoid any medications that contain opioids, including some prescription painkillers and cough preparations, as Revia blocks their effects and may precipitate withdrawal. Always consult your doctor or pharmacist before combining medications.

Is there a generic version of Revia available in Canada?

Yes, generic formulations of naltrexone are available in Canada. They contain the same active ingredient and are typically more affordable than the brand-name product. You may ask your pharmacist if a generic alternative is suitable for your treatment.

Pharmacist Review

The information on this Revia (naltrexone) product page has been professionally reviewed by Michael Chen, a registered pharmacist in Canada (OCP #48293) with the Ontario College of Pharmacists. The review was completed on May 25, 2025, and confirms that the content aligns with current Health Canada prescribing data and professional practice standards for addiction treatment.

Dosing guidelines, safety precautions, side effect profiles, and product descriptions have been checked for accuracy and reflect evidence-based use of naltrexone hydrochloride. This pharmacist-level validation supports the quality and reliability of the clinical information presented here for Canadian patients.

Disclaimer: This pharmacist review is provided for informational purposes only and does not replace a consultation with a licensed physician or other qualified healthcare professional. Medical decisions should always be made with your own doctor, taking your personal health history into account.

Pharmacy Address and Operating Hours

Our Revia dispensing pharmacy is located at 478 Queen Street West, Toronto, Ontario M5V 2B2. You are welcome to stop by during the hours listed below.

Weekly Schedule

Day	Opens	Closes
Monday to Friday	9:00 a.m.	7:00 p.m.
Saturday	9:00 a.m.	5:00 p.m.
Sunday	10:00 a.m.	4:00 p.m.

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