Addiction Recovery

Key takeaways

• This category covers two separate goals: stopping smoking (varenicline, bupropion) and reducing or stopping alcohol use (naltrexone, disulfiram, acamprosate).
• Varenicline and bupropion ease nicotine withdrawal and cravings; the three alcohol medicines work differently from each other, by blocking reward, punishing drinking, or calming post-withdrawal distress.
• The practical difference: disulfiram works through an unpleasant reaction if you drink, while naltrexone and acamprosate reduce craving with no such reaction.
• The #1 safety rule: naltrexone must never be started while opioids are still in your system, and disulfiram must never be combined with any alcohol, including hidden sources like sauces or mouthwash.

How addiction recovery medications work

Nicotine and alcohol both hijack reward pathways in the brain, and each medicine intervenes at a different point. Some ease withdrawal by acting on the same receptors as the substance, some make continued use physically unpleasant, and others calm the nervous system rebound that follows quitting. None of them replaces counselling or a structured quit plan; they raise the odds that one succeeds.

Choosing between varenicline, bupropion, naltrexone, disulfiram and acamprosate

• Varenicline partially activates nicotine receptors, which eases withdrawal symptoms while blocking the satisfaction from any cigarette you do smoke. You typically start it about a week before your quit date.
• Bupropion reduces nicotine cravings through its effect on dopamine and norepinephrine. It lowers the seizure threshold, so it isn't suitable if you have a seizure disorder or a history of an eating disorder.
• Naltrexone blocks the opioid receptors involved in alcohol's rewarding effect, cutting the desire for heavy drinking. It must not be started while opioids, including codeine-containing painkillers, are still in your system: doing so precipitates sudden, severe withdrawal.
• Disulfiram blocks the enzyme that clears alcohol's toxic breakdown product from your body. Drinking even a small amount while taking it triggers flushing, throbbing headache, nausea, vomiting and dangerous swings in blood pressure. The reaction is a deliberate deterrent and can be severe enough to need emergency care.
• Acamprosate calms the nervous system rebound that follows stopping drinking, easing cravings and restlessness once you are already alcohol-free. Unlike disulfiram, it causes no reaction if you drink.

Common questions

Can I use a smoking medicine and an alcohol medicine together?

Varenicline or bupropion is sometimes combined with one of the alcohol medicines, but you need a prescriber who knows both goals so they can watch for overlapping side effects and interactions.

Do these medications work without other support?

They improve the odds of quitting compared with willpower alone, but counselling, support groups or a structured program make the biggest difference. The medicines address physical craving and withdrawal, not habits or triggers.

What happens if I drink accidentally while taking disulfiram?

Even small amounts of alcohol, including in sauces, mouthwash or some liquid medicines, can trigger the reaction. Stop drinking immediately and seek medical care if you develop chest pain, severe vomiting or difficulty breathing.

Safety essentials

• Do not start naltrexone until you have been opioid-free for the period your prescriber specifies. Using it too soon causes precipitated withdrawal.
• Avoid all alcohol, including in food, mouthwash and some liquid medicines, while taking disulfiram.
• Tell your prescriber about any seizure history before starting bupropion, and about liver disease before starting disulfiram or naltrexone, since both are processed by the liver.
• Seek urgent care for chest pain, severe vomiting, breathing difficulty or fainting after alcohol exposure on disulfiram, or for sudden agitation, sweating and diarrhea after starting naltrexone.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.