TheSinclair Method (TSM) is a treatment approach for alcoholism. It combines medication with behavioral principles. The primary medications used are naltrexone and nalmefene. TSM is based on the idea that alcohol dependence is learned: alcohol’s rewarding effects train the brain to crave drinking, and if those reward signals are blocked, the habit weakens over time.
History and Contral Clinics
The Sinclair Method is named after Dr. Sinclair; who worked as an alcohol researcher in Finland for more than 40 years. The Sinclair Method has been offered via Contral Clinics for over 25 years. Contral Clinics was involved in developing and disseminating the TSM approach, and Dr. Sinclair was one of the clinic’s founders. Through long-term use at the clinic, the method has gained traction as a patient-driven alternative to traditional detox and abstinence-based approaches.
Principles and practice
The core of TSM is taking the medication in the context of planned drinking. A patient takes a naltrexone or nalmefene tablet about an hour before consuming alcohol. Naltrexone is an opioid receptor antagonist: it blocks the transmission of alcohol’s pleasurable effects in the brain. When the rewarding effect is absent across repeated drinking episodes, the brain’s learning mechanisms begin to reduce craving and drinking behavior. TSM is not based on abstinence by willpower but on gradual reduction and normalisation of drinking through extinction learning.
The Sinclair Method and cognitive therapy program
TSM can be used as a stand-alone treatment but is often combined with supports such as follow-up visits, counseling, and cognitive-behavioral therapy (CBT). Cognitive-behavioral treatment for alcoholism complement TSM by helping the patient identify triggers, build coping strategies, and strengthen motivation. Together, medication and psychosocial support improve long-term outcomes.
Efficacy and evidence
The effectiveness of TSM has been studied in multiple clinical trials, and meta-analyses show that naltrexone reduces alcohol consumption and heavy-drinking days compared with placebo. The specific TSM protocol — taking the medication before drinking — has proven effective for many patients, who often report reduced compulsive drinking and regained control over time. Nalmefene has also been studied widely and works similarly.
Advantages of TSM include low entry barriers, patient autonomy, and the ability to continue everyday life without intensive detoxification. Potential side effects can include nausea, headache, and mood changes; the medication is contraindicated in severe liver disease and in patients using opioid medications. Therefore, medical evaluation and monitoring are essential.
Who is TSM for?
TSM is particularly suitable for people who do not wish to commit to complete abstinence or who have not succeeded with other treatments. It can be a good option for those seeking a self-directed treatment supported by medical supervision. Cognitive-behavioral treatment for alcoholism is a helpful adjunct when behavioral tools and relapse prevention strategies are needed.
Summary
The Sinclair Method (TSM) is a practical, evidence-based approach to treating alcohol dependence in which naltrexone and nalmefene block alcohol’s rewarding effects and helps extinguish learned addictive behaviors. The long-term involvement of Contral Clinics and Dr. Sinclair has supported the method’s spread for over 25 years. Best results are often achieved by combining TSM with medical oversight and cognitive-behavioral support, providing both medical and psychosocial strategies for addressing alcohol problems.
