Naltrexone: What It Is and How It Works

If you’ve heard the name naltrexone and wonder if it’s right for you, you’re in the right place. Naltrexone is a medication that blocks the effects of opioids and reduces cravings for alcohol. Think of it as a “road block” that stops pleasure signals from reaching the brain when someone drinks or uses an opioid. Because of this, doctors often prescribe it to help people stay clean and avoid relapse.

When Doctors Prescribe Naltrexone

You’ll usually see naltrexone in two main scenarios: treating alcohol use disorder (AUD) and supporting recovery from opioid addiction after detox. In AUD, a typical dose is 50 mg once daily, taken after you’ve stopped drinking for at least three days. For opioid dependence, the medication is given after a full withdrawal period—any opioid left in your system can cause an uncomfortable reaction.

Some clinicians also use a long‑acting injectable form called Vivitrol, which lasts about a month. That version is handy if you forget to take daily pills or want fewer doctor visits. Regardless of the format, the goal stays the same: lower cravings and make staying sober easier.

Dosage, Side Effects, and Safety Tips

The standard oral dose for most adults is 50 mg per day. If you start on a lower dose, your doctor might increase it gradually to let your body adjust. Common side effects include nausea, headache, dizziness, or a feeling of fatigue—usually mild and fade after a week. More serious issues like liver problems can happen, so regular blood tests are recommended if you’re on the drug for a long time.

Never mix naltrexone with opioids; even a small amount can cause sudden withdrawal symptoms. Also, avoid drinking alcohol heavily right after starting the medication because it might increase nausea. If you have liver disease, kidney problems, or are pregnant, let your doctor know—naltrexone may not be safe for you.

When you get a prescription, make sure to follow the exact schedule. Skipping doses can reduce its effectiveness, and taking an extra pill won’t give you faster results—it could just raise the chance of side effects.

Buying Naltrexone Online: What You Need to Know

If you’re looking to buy naltrexone on the internet, treat it like any other prescription drug. First, you need a valid prescription from a licensed doctor—any site that sells it without one is a red flag. Look for online pharmacies that require a prescription upload and have a physical address in the U.S., Canada, or your country’s regulated market.

Check reviews and see if the pharmacy is accredited by organizations like the NABP (Verified Internet Pharmacy Practice Sites). Avoid sites with prices that seem too good to be true; they often sell counterfeit pills. Pay with secure methods, keep a copy of your receipt, and make sure the product arrives sealed with proper labeling.

Remember, buying online doesn’t skip the need for medical supervision. After you receive naltrexone, schedule a follow‑up with your doctor to discuss how it’s working and whether any dosage changes are needed.

In short, naltrexone can be a powerful tool when used correctly. Talk to a healthcare professional, stick to the prescribed plan, and use reputable online sources if you need a refill. With the right approach, you’ll have one less obstacle on the road to recovery.