Last Updated on June 25, 2026

Most people take naltrexone for several months, not several weeks. Longer use is associated with better outcomes and lower relapse risk. The right timeline depends on cravings, drinking patterns, and whether lasting habit changes have started to take hold.

It sounds like an easy enough question: How long should you take naltrexone? When should you stop? It’s tempting to think there’s a universal answer, something like a fixed number of weeks or a point where the medication “finishes its job.”

But the research doesn’t really support that framing. And take it from us: Real-world outcomes rarely do either.

Taking naltrexone isn’t a reset button — you already know that. It’s more like a window, creating enough space for drinking patterns to soften, cravings to subside, and you to explore new and healthier routines. The medication can change the noise levels you experience around alcohol, but what you implement during that period of quiet has a huge impact on what lasts.

Sunnyside Med is built around that exact idea: not just whether the medication works, but the importance of people staying supported while their underlying behaviors actually change and develop.

What the Clinical Evidence Suggests About How Long to Take Naltrexone

The Substance Abuse and Mental Health Services Administration (SAMHSA) supports medications like naltrexone as part of ongoing holistic treatment, often continued for months or longer depending on clinical response. Even if you don’t identify with that diagnosis, this range reflects a consistent pattern: Sustained change tends to require sustained treatment.

A 2022 systematic review in Addiction found that extended-release naltrexone reduced drinking days and heavy drinking days, with larger reductions in heavy drinking days seen in studies lasting more than three months. Shorter-duration trials did not show the same statistically significant effect for that outcome.

In other words, duration wasn’t a minor variable. It appeared to be an important factor in outcomes. That matters because a lot of people are tempted to stop early, often right when benefits start showing up.

Clinicians also see this moment: Someone starts feeling a little more in control, assumes the work is done, and discontinues before those early shifts consolidate into stable habits.

In both situations, integrated programs like Sunnyside Med are invaluable, pairing naltrexone with tracking tools, coaching, and clinical oversight designed to extend engagement beyond the first few weeks—when drop-off is most common.

Naltrexone Doesn’t Replace Habits. It Reduces Friction.

Mechanistically, naltrexone works by blocking opioid receptors involved in alcohol’s reward response. Over time, that reduces how strongly alcohol is reinforced in the brain.

What many people notice isn’t dramatic suppression of desire. It’s more subtle:

• Cravings feel less urgent
• The “just one more” loop quiets
• Stopping becomes less cognitively exhausting

But the key shift is what makes it possible, not what it eliminates. A randomized clinical trial by Santos and colleagues (2022), published in the American Journal of Psychiatry, found that sexual and gender minority men with mild to moderate alcohol use disorder who used as-needed (targeted) naltrexone significantly reduced binge drinking and overall alcohol consumption during a 12-week trial. Many of these improvements were still evident six months after treatment ended.

That suggests something important about mechanism: the medication may not need to last forever to create lasting change—but it does need to last long enough for behavior to reorganize around it.

That “enough time” is exactly where clinical guidance tends to land: not weeks, but months.

Supportive care models like Sunnyside Med are designed around that window, helping people use the period of reduced reinforcement to actually build alternative routines, not just wait for cravings to fade.

What Happens When You Stop Taking Naltrexone

Naltrexone is not physically addictive, and discontinuation does not cause withdrawal, but the timing of discontinuation still matters.

When the medication is stopped, its receptor blockade effect clears relatively quickly. If behavioral patterns haven’t shifted during treatment, old reward loops can reassert themselves.

This is why the “I feel better, so I’m done” moment can be misleading. Feeling better early is often the beginning of change, not the completion of it.

A more durable stopping point usually looks different. It’s not just reduced drinking—it’s reduced effort required to maintain that reduction.

Clinicians working through Sunnyside Med often frame discontinuation as a clinical review point rather than a personal decision made in isolation: Are the habits stable enough that removing pharmacological support won’t destabilize progress?

One important safety note: opioid tolerance decreases during naltrexone treatment. Any changes in the use of opioid medications should be discussed with a clinician, since previously tolerated doses may become dangerous after discontinuation.

Naltrexone Isn’t Only for Severe Alcohol Use Disorder

Most clinical trials on naltrexone enroll participants with diagnosed alcohol use disorder. That’s the population the evidence base is built around.

But the underlying neurobiology isn’t exclusive to severe cases. The reward pathways involved in alcohol reinforcement exist on a spectrum.

Early intervention research increasingly suggests that addressing problematic drinking earlier may help prevent escalation into more severe patterns over time. In that context, naltrexone isn’t just a “last step” treatment—it can function well as an earlier intervening tool, too.

Luckily, access models are changing, and naltrexone is becoming known and available to more people. Rather than requiring a long progression through traditional treatment systems, Sunnyside Med’s assessment process can help you understand whether medication support is right for you.

How Clinicians Think About “How Long Is Long Enough”

There isn’t a single universal cutoff, but research and clinical practice tend to converge on a few principles:

• Sustained use (often several months) is associated with better outcomes than brief trials.
• Behavior change needs time to stabilize beyond initial craving reduction.
• Stopping is most successful when routines no longer depend on effortful control.

In other words, it’s about what you build while you’re taking naltrexone, not just what happens as a direct result of the medication.

Programs like Sunnyside Med emphasize that distinction by treating the medication period as active behavior change work, not passive symptom suppression.

Changes in Cravings and Energy

Early changes tend to be subtle rather than dramatic. Many Sunnyside Med users describe, after some time taking naltrexone, a less constant internal dialogue around drinking. 

Over time, other shifts show up:

• fewer negotiations with oneself around “just one more”
• more consistent stopping points
• less mental bandwidth spent thinking about alcohol

Cravings often begin to ease within 30 to 90 days, but behavioral rewiring typically takes longer. That mismatch between how quickly things feel different and how long change actually takes is where expectations often get misaligned.

Support systems like Sunnyside Med are designed to extend that runway, pairing medication with coaching and tracking so early improvements don’t collapse when motivation fluctuates.

The Real Answer to “How Long Should You Take Naltrexone?”

The most accurate answer isn’t a fixed number. (Sorry.) It’s long enough for drinking patterns to stop relying on effort alone.

For some people, that’s a few months. For many, it’s closer to the 6-12 month range reflected in clinical guidance. And for almost everyone, it’s longer than the initial “this seems to be working” phase that often prompts early discontinuation.

If you’re trying to understand what that timeline might look like in your own situation, a clinician-reviewed starting point is usually the next step.

You can begin with Sunnyside Med to see whether medication support fits where you are right now, and how long a guided plan might make sense for your goals.

This article is not medical advice. Naltrexone is a prescription medication, and decisions about starting or stopping it should always be made with a licensed clinician.

Sunnyside is the Perfect Companion for Your Naltrexone Journey

Sunnyside is the #1 mindful drinking app. Since 2020, we’ve been honing our harm-reduction approach and have helped over 400,000 people cut out 22 million drinks from their baseline habits. 96.7% of our members report success drinking less, and in a third-party study, our approach reduced weekly drinking by 33% after 12 weeks. 

Think of Sunnyside as the front door for anyone who wants to change their relationship with alcohol. If you want to drink less, we can help you get there. If you want to eventually quit, but want to take a gradual approach, we can make that happen.

When you sign up for Sunnyside, you’ll take a quick 3-minute personalization quiz, then hop into the app. It’s as simple and quick as that. 

We’ll give you weekly plans to gradually reach your drinking goals, and we’ll provide nudges, coaching, exercises, and advice to help you get there. 

We have daily tracking and journaling tools, including the option to chat with a real human coach at any time. And, of course, we have great analytics so you can track your progress over time. 

Sunnyside is a full-featured mindful drinking app, and thus the perfect companion for your naltrexone journey. Naltrexone will actively help you reduce cravings around alcohol, and Sunnyside will help you understand your triggers and patterns, giving you a healthy system for habit change. 

Everyone who signs up for Sunnyside gets a free 15-day trial, then the subscription is $8.25/month, less than the cost of a fancy drink. Our members save an average of $50 per month, easily paying for the cost of the subscription.

Whether you’re currently taking naltrexone or just doing some research on alcohol moderation, we’d love to have you sign up for our 15-day free trial today.