The Sinclair Method: naltrexone before drinking, and what the evidence really shows

The Sinclair Method, or TSM, means taking the medication naltrexone about an hour before you drink, every time you drink, instead of getting sober first. Naltrexone blunts the endorphin reward alcohol normally produces, so over months the brain's learned link between drinking and pleasure gradually weakens, a process its originator called pharmacological extinction. The mechanism is real and naltrexone is FDA-approved for alcohol use disorder, but the headline success figure attached to TSM is softer than it sounds, and whether the approach fits you is a clinical decision, not a website's.

What is the Sinclair Method?

The Sinclair Method is a treatment, pioneered by the scientist John David Sinclair, that aims for pharmacological extinction of problem drinking by taking the opioid antagonist naltrexone alongside continued, controlled alcohol consumption, rather than requiring abstinence first. That last clause is the whole departure. Most medication-assisted approaches ask you to stop drinking and then take a daily pill to stay stopped. TSM inverts the order: you keep drinking at the start and time each dose to the drink, so the medicine is present in your body precisely when alcohol would normally pay off.

Sinclair was not a fringe figure. John David Sinclair (1943 to 2015) earned his doctorate on the alcohol deprivation effect and then spent decades in Finland at the Alko research laboratories, later part of the National Public Health Institute, where he developed and clinically tested targeted naltrexone. The method carries his name because he built the case for the timing, not because a marketing team coined it.

How does pharmacological extinction actually work?

Start with what a drink does in the brain. Alcohol triggers a release of endorphins that land on opioid receptors, and that hit is a large part of why drinking feels rewarding and why the habit entrenches. Naltrexone sits on those receptors and blocks them. Take it before you drink and the endorphin reward is blunted, so the alcohol arrives without its usual payoff. Repeat that enough times and the brain's learned association between drinking and pleasure weakens, the same way any behavior fades when the reward stops arriving. That is the extinction in pharmacological extinction.

The practical upshot surprises people: on TSM you are meant to keep drinking, at least at first, because the drinking-without-reward pairing is the active ingredient. Skip the dose and drink, and you reinforce the old loop instead of weakening it. This is why compliance matters more than enthusiasm, and why it is genuinely different from white-knuckle quitting. Naltrexone is not addictive and is FDA-approved for alcohol use disorder, and MedlinePlus describes it as decreasing the craving for alcohol. One firm boundary: it must not be taken by people who are using opioids, because it can trigger sudden opioid withdrawal, which is one reason starting it belongs with a prescriber.

Where does the 78 percent figure come from, and how solid is it?

You will see "78 percent" quoted everywhere TSM is promoted, usually as a success rate. Treat the number with care, because two different claims hide inside it. The figure traces largely to Sinclair's own work and to advocacy sources, notably Roy Eskapa's book and the C Three Foundation, rather than to independent large trials, and the same reference notes that no large randomized controlled trial of the specific Sinclair Method protocol has been published. That is not a claim the method does not work; it is a claim the headline percentage does not rest on the kind of evidence people assume it does.

There is a second catch in how success is defined. According to a telehealth provider's review of the evidence, the Sinclair Method site's 78 percent does not define success as abstinence. Instead users define success for themselves, described as the degree of liberty they feel from alcohol, and again no large randomized controlled trial of TSM has been published. A self-defined, non-abstinence outcome measured outside a controlled trial is a perfectly reasonable thing to report, but it is not the same as a hard sobriety rate from a head-to-head study, and the two get conflated constantly. If you find the percentage motivating, fine, but do not lean on it as proof. The stronger evidence is for the medicine itself, which is a separate matter covered next.

What does the wider naltrexone evidence say?

Here the ground is firmer. The largest recent synthesis is a 2023 JAMA systematic review and meta-analysis of 118 clinical trials and 20,976 participants, which found that oral naltrexone at 50 mg per day lowered the rate of returning to any drinking, with a number needed to treat of 18, and lowered the rate of returning to heavy drinking, with a number needed to treat of 11. Number needed to treat is just how many people have to take the medicine for one extra person to avoid that outcome, so lower means a stronger effect. An NNT of 11 to 18 is a modest but real benefit, in the same range as medicines prescribed for plenty of other chronic conditions.

This is not a new or experimental drug. Oral naltrexone has been FDA-approved to treat alcohol use disorder since 1994, marking three decades as an alcohol treatment in 2024, yet it remains widely underused relative to its evidence. The NIAAA makes the point bluntly: the medications approved for alcohol use disorder are neither addicting nor difficult to prescribe, and yet only a small fraction of people who could benefit receive any of them. Our guide to medications to stop drinking walks through naltrexone alongside acamprosate and disulfiram in more depth.

It is worth being precise about which claim this evidence supports. The 2023 meta-analysis is about naltrexone the medication, taken in standard ways across many trials. It is not a trial of the TSM protocol specifically. So the honest summary is two-layered: the drug reliably reduces heavy drinking, and the particular targeted-before-drinking schedule is biologically reasonable and has supportive smaller studies, but it has not been put through a large randomized trial of its own.

How is the Sinclair Method different from taking naltrexone for abstinence?

Same molecule, opposite starting move. In the abstinence model you stop drinking first and take naltrexone daily to keep cravings down while sober. In TSM you keep drinking at the outset and take naltrexone before each drinking occasion so the reward extinguishes over time. Sinclair argued the timing is decisive, and his own data is the core of that argument. In his 2001 review of eight double-blind placebo-controlled naltrexone trials across five countries, the medication beat placebo when paired with coping-skills therapy that accepted occasional drinking, but showed no significant benefit over placebo when combined with support for total abstinence. If that holds, then how you use naltrexone changes whether it helps at all.

That conclusion did not come from theory alone. The foundational targeted-naltrexone trial by Heinala, Sinclair and colleagues randomized 121 non-abstinent outpatients with alcohol dependence, giving naltrexone or placebo daily for 12 weeks and then only when craving, with the coping-skills-plus-naltrexone group showing the best outcome. Both uses of the medicine are legitimate; which one suits you depends on your goal and your history, and a prescriber helps you choose. If your aim is moderation rather than zero, our guide on how to cut back on drinking covers the behavioral side that medication does not replace.

How do people access the Sinclair Method in 2026?

Through a licensed clinician, by one of a few routes. The most ordinary is your own doctor, who can prescribe naltrexone and discuss taking it before drinking. If you would rather start with a specialist or a directory, the NIAAA Alcohol Treatment Navigator points to prescribers near you. There are also telehealth programs built around alcohol medication. As of June 2026, Oar Health offers naltrexone by mail after an online assessment and clinician review, explicitly lets members take it daily or follow the Sinclair Method, lists plans starting at 99 dollars per month, and states that prescription medication is available only if prescribed by a licensed clinician. As of the same date, Ria Health is a fully online program that pairs several FDA-approved alcohol medications, including naltrexone, with video visits and recovery coaching through a smartphone app, supporting goals of drinking less or not at all. We name these as examples, not endorsements, and have no affiliation with either.

Whichever route you take, a clinician evaluates whether naltrexone is right for you, and no legitimate service ships it without a proper assessment. If you are weighing the full picture of support around any medication, our guide to where to find alcohol help maps the options.

What is a realistic timeline, and what should you expect?

Plan in months, not days. Sinclair described extinction as typically taking around four to six months of taking naltrexone before each drinking occasion, with the exact length varying from person to person. During that window many people find they drink less without forcing it, as the desire quietly loses its grip, while others see a smaller change. The catch is compliance: the medicine only does its work on the occasions you actually take it before drinking, so consistency matters more than speed. One missed dose followed by a drink does not undo everything, but a pattern of skipping the medicine and drinking anyway reinforces the old loop.

Set expectations like an experiment rather than a promise. Track your drinking over weeks, note whether the pull is softening, and review with your prescriber. Some people drink much less or stop altogether; others land somewhere in between and pair the medicine with counseling or peer support to get the rest of the way. The behavioral layer is where Orlyn, our iOS app, fits: one-tap daily check-ins, a craving SOS for the hard minutes, and a 24/7 coach that is clearly labeled AI, not a clinician and not medical care. It complements treatment and mutual-support groups, never replaces them, and it does not prescribe or manage medication; that decision lives with your doctor.

Is the Sinclair Method right for you?

It may be worth a conversation if you want to reduce or stop drinking, you are not using opioids, and a self-paced, take-before-drinking approach appeals more than stopping cold. The case for it rests on a sound mechanism and on naltrexone's genuinely strong independent evidence for cutting heavy drinking, while the case for caution is that the specific protocol lacks a large randomized trial and its famous success figure comes from advocacy and self-defined outcomes rather than a controlled study. Both of those can be true at once, and holding them together is the clear-eyed way to decide. This page is information, not medical advice, and starting any medication is a clinical decision made with a prescriber who knows your history.

One safety note matters more than any of the above. TSM has you keep drinking at first, so it is not a plan for stopping suddenly, and that distinction is important: if your body has come to expect alcohol every day, stopping abruptly on your own can be dangerous, and people who are physically dependent should not stop without medical advice. If quitting outright is on your mind, see what that process looks like hour by hour in our alcohol withdrawal timeline, and if symptoms like shaking, a racing heart, confusion, or seizures appear, treat that as urgent and use our crisis resources right away.

All guides · Start Day One