Three prescription medications are FDA-approved specifically to help people stop drinking or drink less: naltrexone, acamprosate, and disulfiram. Each works differently, and the best choice depends on whether you’re trying to quit entirely, cut back, or stay sober after you’ve already stopped. Beyond these three, several off-label medications and nutritional supplements also play important roles in recovery.
Naltrexone: Reducing the Reward of Drinking
Naltrexone works by blocking the brain’s reward response to alcohol. Normally, drinking triggers a release of feel-good chemicals in the brain’s pleasure pathways. Naltrexone dampens that signal, so alcohol feels less satisfying and cravings weaken over time. It’s most effective for people who want to reduce heavy drinking or who have already stopped and want to stay on track.
Naltrexone comes in two forms: a daily pill and a monthly injection. The injectable version offers a practical advantage. In clinical studies, patients receiving the monthly shot stayed in treatment longer and had lower rates of heavy drinking compared to those taking the daily pill. That makes sense: you can skip a pill, but once the injection is given, it works for a full month regardless. In a meta-analysis of retrospective studies, people on the injectable form were about 59% more likely to remain in treatment at six months.
The major restriction with naltrexone is that you cannot take it if you’re using opioid painkillers or opioid-based medications like methadone or buprenorphine. Because it blocks opioid receptors, it can trigger sudden and severe withdrawal in anyone with opioids in their system. Your doctor will typically require a urine test or a waiting period before prescribing it. Naltrexone can also stress the liver, so people with significant liver disease need close monitoring.
Acamprosate: Stabilizing the Brain After Quitting
Acamprosate takes a different approach. When someone drinks heavily for a long time, the brain’s chemical signaling becomes disrupted. After quitting, this imbalance can produce anxiety, restlessness, and a persistent pull toward drinking. Acamprosate appears to calm that disrupted signaling by rebalancing the brain’s excitatory and inhibitory systems.
This medication works best for people who have already stopped drinking and want to maintain abstinence. In a meta-analysis of 18 studies involving nearly 2,300 people recently withdrawn from alcohol, acamprosate nearly doubled the odds of staying continuously sober at 12 months compared to a placebo. A larger analysis of over 6,300 participants found it reduced the percentage of drinking days by about 8 days per month compared to no medication.
Acamprosate is taken as a tablet three times a day, which can be a challenge for some people. It’s processed by the kidneys rather than the liver, making it a safer option for those with liver problems. It does not produce any unpleasant reaction if you drink while taking it, so it relies on your motivation rather than punishment to keep you on track.
Disulfiram: Making Alcohol Physically Unpleasant
Disulfiram works on a completely different principle. It doesn’t reduce cravings or rebalance brain chemistry. Instead, it interferes with how your body breaks down alcohol. If you drink while taking disulfiram, a toxic byproduct accumulates in your bloodstream, causing flushing, nausea, vomiting, headache, and a rapid heartbeat. The reaction can start within minutes and last for hours.
The idea is simple: knowing you’ll feel awful creates a powerful deterrent. And the data supports it. In a large network analysis of over 27,000 participants across 156 trials, supervised disulfiram treatment was among the most effective options for maintaining abstinence. It reduced the risk of heavy drinking by about 81% compared to placebo. The key word is “supervised.” Disulfiram works best when someone else (a partner, pharmacist, or clinic) watches you take it daily, because it’s easy to simply stop taking a pill when you want to drink.
Disulfiram is not appropriate for everyone. It’s contraindicated in people with severe heart disease, psychosis, pregnancy, or significant liver problems. You also need to be careful with hidden alcohol sources like certain cough syrups, mouthwashes, and cooking wines, as even small amounts can trigger a reaction.
Off-Label Medications That Show Promise
Two medications originally developed for other conditions have shown meaningful results for alcohol use disorder, though they aren’t FDA-approved for this purpose.
Topiramate, an anti-seizure medication, has performed well in clinical trials. A meta-analysis of seven randomized trials involving over 1,100 people found that topiramate led to higher abstinence rates and fewer heavy drinking days compared to placebo. One head-to-head trial comparing it directly to naltrexone found topiramate performed at least as well, and on some measures like drinks per day and heavy drinking days, it appeared more effective. The trade-off is side effects: some people experience word-finding difficulties, tingling in the hands and feet, weight loss, fatigue, or dizziness. Most tolerate it well enough to stay on it, but the cognitive effects bother some people.
Gabapentin, another anti-seizure drug, has more limited evidence. In a meta-analysis of seven placebo-controlled trials, it only showed a statistically significant benefit for one measure: reducing the percentage of heavy drinking days. It may be most useful for people who also have anxiety or sleep problems during early recovery, since it can help with both. Your doctor might consider it as an add-on rather than a standalone treatment.
Supplements That Support Early Recovery
Heavy drinking depletes essential nutrients, and replacing them is an important part of stopping safely. The most critical supplement is thiamine (vitamin B1). Chronic alcohol use impairs thiamine absorption, and severe deficiency can cause a dangerous brain condition called Wernicke’s encephalopathy, which affects coordination, eye movements, and memory. If untreated, it can progress to permanent brain damage.
Thiamine is recommended for everyone going through alcohol withdrawal. For people in otherwise good health with a reasonable diet, the standard recommendation is 300 mg per day orally (split into three doses) for three to five days, followed by 100 mg daily for another one to two weeks total. People who are malnourished or have been drinking heavily for a long time typically need higher doses given by injection.
Deficiencies in other B vitamins, vitamin C, zinc, and magnesium are also common. A daily multivitamin can help cover these gaps during the first weeks of recovery. Magnesium is especially important, as low levels can worsen anxiety, muscle cramps, and sleep problems during withdrawal.
Why Withdrawal Needs Medical Attention
Stopping alcohol abruptly after heavy, prolonged use is one of the few types of withdrawal that can be life-threatening. Seizures are most common in the first 12 to 48 hours after the last drink. A more severe condition called delirium tremens, which involves confusion, hallucinations, dangerously high blood pressure, and fever, typically develops 48 to 96 hours after the last drink but can appear as late as 7 to 10 days out.
Medical detox uses sedative medications to keep the nervous system from going into overdrive during this window. Treatment is guided by symptom severity rather than a fixed schedule, meaning you receive medication based on how your body is actually responding. This approach is safer and uses less medication overall than giving everyone the same dose on a set timetable.
Not everyone who stops drinking needs medical detox. If you’ve been a moderate drinker, withdrawal may be mild or nonexistent. But if you’ve been drinking heavily every day for weeks or months, or if you’ve had withdrawal seizures before, supervised detox significantly reduces your risk of serious complications.
Choosing the Right Approach
The best medication depends on your specific situation. If you’re still drinking and want to cut back, naltrexone (especially the monthly injection) is a strong starting point. If you’ve already quit and want help staying sober, acamprosate has the best evidence for maintaining long-term abstinence. If you need a firm external deterrent and have someone who can supervise your daily dose, disulfiram is remarkably effective. Topiramate is worth discussing with your doctor if the first-line options haven’t worked or aren’t suitable for you.
Medication alone isn’t usually sufficient. The strongest outcomes in clinical research come from combining medication with some form of counseling or behavioral support, whether that’s formal therapy, a structured program, or peer support groups. Medication handles the biological side of dependence. Counseling addresses the patterns, triggers, and habits that medication can’t reach.