Several medications are used to treat alcohol withdrawal, and the right choice depends on how severe your symptoms are. Mild withdrawal may not require medication at all, while moderate to severe cases typically call for benzodiazepines as the primary treatment. Beyond the acute phase, a separate set of medications can help prevent relapse once withdrawal is over.
How Severity Determines Treatment
Doctors assess alcohol withdrawal using a standardized scoring tool called the CIWA-Ar, which rates ten symptoms including anxiety, tremor, sweating, nausea, and agitation. Scores of 8 or below generally don’t require medication. Treatment typically begins when scores reach 8 to 10, with more aggressive approaches for scores above 20, which sometimes require intensive care.
This matters because it shapes everything that follows. Someone with mild shakiness and anxiety faces a very different treatment plan than someone at risk for seizures or delirium tremens, the most dangerous form of withdrawal.
Benzodiazepines: The First-Line Treatment
Benzodiazepines are the gold standard for alcohol withdrawal. The three most commonly used are diazepam (Valium), lorazepam (Ativan), and chlordiazepoxide (Librium). They work by calming the same brain receptors that alcohol affects, essentially easing your nervous system through the transition instead of letting it rebound dangerously.
Each has slightly different properties. Diazepam acts quickly and lasts a long time, which provides a smoother experience but can build up in your system. Chlordiazepoxide is longer-acting and often used for more predictable, milder cases. Lorazepam is the go-to for people with liver problems because it’s processed differently. Instead of being broken down through the liver’s main enzyme pathways, lorazepam and a related drug called oxazepam go through a simpler process called glucuronidation, which still works even when the liver is compromised. This is a critical distinction for heavy drinkers who may already have liver damage.
Dosing can be fixed on a schedule or triggered by symptoms, where a nurse checks your score at regular intervals and gives medication only when symptoms cross a threshold. The symptom-triggered approach tends to use less total medication and can shorten treatment.
Phenobarbital for Severe or Resistant Cases
When benzodiazepines alone aren’t controlling symptoms, or when someone is at high risk for dangerous withdrawal, phenobarbital is an important backup. It works on both of the brain’s key signaling systems involved in withdrawal: it activates the calming GABA system and blocks the excitatory glutamate system. This dual action gives it an edge in tough cases.
Phenobarbital also has a very long half-life, meaning it stays active in your body for an extended period. This creates a natural, gradual tapering effect. Treatment typically involves a loading dose given over several hours in a hospital setting, followed by a short taper over about five days. It requires close monitoring because combining it with high doses of benzodiazepines increases the risk of excessive sedation and breathing problems.
Anticonvulsants for Mild Withdrawal
For mild cases, two anticonvulsant medications offer an alternative to benzodiazepines. Gabapentin (Neurontin) and carbamazepine (Tegretol) can both reduce withdrawal symptoms like anxiety, irritability, and insomnia. Gabapentin is typically started at a higher dose of 600 to 1,200 mg per day for the first three days, then tapered down over the following week. Carbamazepine follows a similar pattern, starting at 600 to 800 mg per day and tapering to 200 to 400 mg over four to nine days.
The important caveat: neither medication reliably prevents withdrawal seizures or delirium tremens. That’s why they’re reserved for mild cases or used alongside benzodiazepines in moderate ones. Gabapentin has an added advantage for people who plan to keep taking it after withdrawal, since it’s also effective for reducing alcohol cravings long-term.
Medications for Specific Symptoms
Alcohol withdrawal pushes your cardiovascular system hard. Your heart rate spikes, blood pressure rises, and you may feel jittery or shaky. Beta blockers like atenolol can help bring these vital signs under control more quickly when used alongside the primary withdrawal medication. They’re especially worth considering if you have underlying heart disease, since the cardiovascular strain of withdrawal can be dangerous on its own.
Clonidine, a blood pressure medication, also reduces the autonomic symptoms of withdrawal: sweating, rapid heartbeat, and tremor. Neither beta blockers nor clonidine treat the underlying withdrawal itself or prevent seizures, so they’re always used as add-ons, never alone.
Thiamine to Prevent Brain Damage
Thiamine (vitamin B1) isn’t a withdrawal medication in the traditional sense, but it’s one of the most important things given during treatment. Chronic heavy drinking depletes thiamine, and without replacement, you’re at risk for Wernicke-Korsakoff syndrome, a form of brain damage that causes confusion, coordination problems, and severe memory loss.
The old standard of 100 mg per day, chosen somewhat arbitrarily in the 1950s, is now considered too low for high-risk individuals. Thiamine has a short half-life of about 90 minutes, which is why many guidelines now recommend giving it two or three times daily. For people who are malnourished or have been drinking heavily, intravenous or intramuscular thiamine is preferred for the first two to three days because oral absorption is poor in people with alcohol use disorder. After that initial period, the switch to oral supplementation is typical. Guidelines from various medical bodies recommend anywhere from 100 to 500 mg daily by IV depending on risk level, with higher doses for anyone showing neurological symptoms.
Medications to Prevent Relapse After Withdrawal
Once withdrawal is over, a different category of medications can help you stay sober. These aren’t interchangeable, and they work through completely different mechanisms.
Naltrexone blocks the brain’s opioid receptors, which are part of the reward system that makes drinking feel pleasurable. By dulling that reward, it reduces cravings and makes drinking less reinforcing if a relapse does occur. The standard dose is 50 mg once daily, and it’s also available as a monthly injection for people who prefer not to take a daily pill.
Acamprosate works on a different system entirely. It helps restore the balance between excitatory and calming brain signals that gets disrupted by chronic drinking. It’s taken as two tablets three times a day for people over 132 pounds. Because that’s a lot of pills, doctors often start at half the dose and increase gradually to avoid stomach upset.
Disulfiram takes a completely different approach: it makes you feel sick if you drink. It blocks the enzyme that breaks down a toxic byproduct of alcohol metabolism, so even a small amount of alcohol causes flushing, nausea, and vomiting. It starts at 250 mg daily. Disulfiram only works if you actually take it, which is why it’s most effective when someone else (a partner, pharmacist, or clinic) supervises you taking the pill.
Topiramate is sometimes used off-label to reduce cravings. It works by dampening the dopamine surge associated with alcohol desire. It’s started at a low dose of 25 mg and gradually increased, which helps minimize side effects like tingling, cognitive fogginess, and appetite changes.
Baclofen: A Newer Option Under Study
Baclofen, a muscle relaxant that also acts on the GABA system, has shown promise in small studies. In one trial, 30 mg per day of baclofen reduced withdrawal symptoms at a rate comparable to diazepam, with similar decreases in symptom scores over the first three days. Another study found that patients given baclofen needed significantly less rescue medication than those given a placebo. However, the studies so far have been small and have design limitations. Baclofen at 30 mg per day is not currently recommended outside of clinical trials, and benzodiazepines remain the standard first-line treatment.