Patients starting an addiction recovery program often ask, “How long does Antabuse take to work?” It starts working quickly, and once it’s in your system, its effects can last for up to 14 days after you take the final dose. While it’s not a detox medication, it can be a useful tool for helping prevent relapse when it’s part of a broader treatment plan.
| Question | Short Answer |
|---|---|
| When does Antabuse start working? | Effects may begin within 3 to 12 hours of the first dose |
| What’s its half-life? | Roughly 60 to 120 hours |
| How long can a reaction still happen? | Up to 14 days after the last dose |
| How long should you wait before drinking? | At least 14 days after the last dose |
| How soon after drinking can you start it? | At least 12 hours after your last drink |
What Is Antabuse?
Luckily, a multitude of support systems and medical interventions are in place to prevent relapse. Antabuse is the brand name for the generic medication disulfiram, one of the medications approved to treat alcohol use disorder. This drug doesn’t address the underlying emotional issues causing alcohol dependency. And unlike medications designed to reduce alcohol cravings, it works as a deterrent during long-term recovery.
Antabuse works by making your body sensitive to alcohol. Normally, your liver breaks alcohol down into a toxin called acetaldehyde and then quickly clears it. Disulfiram blocks the enzyme that clears acetaldehyde, so if you drink, the toxin builds up and causes an intensely unpleasant reaction.
Antabuse isn’t right for everyone. It’s generally not prescribed for people with severe heart disease, certain psychiatric conditions or an allergy to its ingredients. Tell your prescriber if you’re pregnant or breastfeeding or have liver, kidney or heart problems. The decision to take medication for alcohol dependence should be made with a physician who can prescribe and monitor it.
People prescribed the medication will have questions about how it works — for instance, how long after Antabuse can you drink, and how long does Antabuse last? We’ll get into the answers below.
Does Antabuse Work After One Dose?
Yes, Antabuse typically begins working after the first dose. Once the drug is absorbed, it blocks the enzyme aldehyde dehydrogenase. If you drink alcohol, you can experience an intense and unpleasant physical reaction, which is why it can be a useful tool for people committed to staying sober.
How Long Does Antabuse Take to Work?
The disulfiram onset time is relatively quick. According to the prescribing information, effects may take 3 to 12 hours to begin after the first pill.
How Long Does It Stay in Your System?
The Antabuse effectiveness timeline is unique because the medication can linger in the body long after you’ve taken it. The drug has a half-life of around 60 to 120 hours, and it can remain active for up to 14 days.
How Long After Antabuse Can You Drink?
To be on the safe side, individuals should avoid drinking for 14 days after their last dose of Antabuse. Some sources say you can drink again after 72 hours, but the risk of having a reaction remains until the medication has fully cleared your system. Additionally, the first dose shouldn’t be taken until at least 12 hours after drinking.
If you drink on Antabuse, you might get that drunk feeling, but you’ll also feel sick. The medication blocks the liver from finishing the job of breaking down alcohol, which leaves the body in a toxic state. The body responds by trying to get rid of the toxins, which can cause severe nausea and vomiting.
One of the potential side effects of the drug — especially with long-term use — is liver damage, which is why prescribers typically check liver enzymes with regular blood tests. Antabuse is a prescription medication that shouldn’t be taken lightly. If you know how your body will react to the medication and still have a strong desire to drink, make a point of phoning a friend or your sponsor.
Disulfiram and Drinking
Disulfiram and drinking don’t make for the perfect marriage. Because disulfiram interferes with the metabolizing of alcohol, it can make you sick on a hair trigger. Understanding the side effects of disulfiram and the dangers of a reaction is an important part of using it safely. Even consuming a small amount of alcohol can leave you with that hangover feeling, coupled with symptoms such as:
- Violent vomiting episodes
- Persistent nausea
- Blinding headaches
- Hot flushes and sweating
- Episodes of dizziness and fainting
- Brain fog and confusion
- Labored breathing, accompanied by chest pain
- Irregular heartbeat
- Stomach cramps and diarrhea
The risk of drinking while on disulfiram isn’t worth the consequences. People with a history of coronary disease or other heart problems are generally advised to avoid the drug, as a reaction can strain the heart and, in rare cases, contribute to heart failure. Symptoms may last from 30 minutes to several hours, depending on the quantity of alcohol consumed. Bear in mind that you don’t build up a tolerance to disulfiram; the longer you take it, the more sensitive to alcohol you may become.
“I Drank on Antabuse…Now What?”
If you drank while taking Antabuse and develop chest pain, trouble breathing, fainting or a racing or irregular heartbeat, call 911 right away. For milder symptoms, stop drinking, avoid any other alcohol-containing products and contact your prescriber. For questions about a possible overdose, Poison Control is available at 1-800-222-1222.
Anything containing small traces of alcohol can trigger the same kind of reaction, which means it’s best to avoid the following:
- Cough syrup
- Fermented health drinks
- Perfumes and colognes
- Wine-based sauces
- Lotions and liniment rubs
- Alcohol swabs
- Mouthwash
- Hand sanitizer
Relapse is common, and it isn’t a sign of failure. But if drinking happens while you’re on a prescription medication regimen, it’s a signal that you may need more support. Inpatient care can give you the tools you need to live one day at a time. While under care, you can tackle the underlying causes of your addiction and build coping skills.
Antabuse works best alongside other support. Regular check-ins with your health care provider, counseling and a structured treatment program can help you address what’s driving your drinking while the medication helps you stay on track.
How Long Do People Take Disulfiram?
The length of time an individual uses disulfiram is based on personal recovery needs. Some people use Antabuse for a few months to get through the early, high-risk stages of sobriety. Others may stay on the medication for a year or longer as a long-term maintenance tool to help prevent relapse. Your prescriber will help decide the right length based on your recovery goals and how your body responds to the medication.
Frequently Asked Questions
Getting Support
Contact Sunlight Recovery if you’re struggling with alcohol or drug use. Our team can answer your questions about recovery and help you understand your options for alcohol addiction treatment in South Florida, from medically supervised detox to residential care in Boca Raton. With the right kind of help and a willingness to put in the work, recovery is possible.
Call our 24/7 admissions line at (855) 625-6684. Every call is confidential, with no obligation.
