Naltrexone vs Acamprosate: A Practical Guide for Alcohol Recovery

What Is Acamprosate?

Acamprosate (brand name Campral) is an FDA-approved medication used to help people with alcohol use disorder maintain sobriety after they stop drinking. It does not help someone quit drinking outright. Instead, it supports the brain through the difficult period after alcohol stops.

Heavy, long-term drinking disrupts the brain’s chemistry. Acamprosate helps restore that chemical balance after alcohol cessation. The FDA approved it in 2004.

How It Works

Alcohol abuse affects key neurotransmitters particularly GABA and glutamate. When someone stops drinking, those disruptions can cause anxiety, restlessness, and insomnia. Acamprosate works to normalize that imbalance, helping the brain settle into a calmer state without alcohol.

Who It’s For

Acamprosate is typically prescribed for people who have already stopped drinking and want support staying sober. It works best for those committed to full abstinence.

Dosage and Use

It comes as oral tablets (333 mg each). The standard regimen is two tablets taken three times daily at consistent times. The schedule can be demanding, but sticking to it matters for the medication to work.

Side Effects

Common side effects include:

• Diarrhea
• Nausea
• Loss of appetite
• Fatigue
• Anxiety

Acamprosate is not processed through the liver. So, it is safer for people with liver disease. However, those with severe kidney impairment should avoid this medication.

What Is Naltrexone?

Naltrexone is another widely used medication in alcohol recovery treatment. It works by reducing cravings and blocking the rewarding effects of alcohol. Its oral form received FDA approval in 1994. Its extended-release injectable form, Vivitrol, was approved in 2006.

How It Works

Naltrexone is an opioid antagonist. It blocks the brain receptors responsible for the pleasure and reward response to alcohol. When someone drinks while taking naltrexone, the euphoric effect is greatly reduced. Alcohol becomes less rewarding, which lowers the urge to keep drinking.

Who It’s For

Naltrexone is a strong option for people still struggling with cravings or who have not yet achieved full abstinence. It is also effective at reducing drinking frequency and preventing binge episodes.

Dosage and Use

It comes in two forms:

• Oral tablets: 50 mg taken once daily
• Extended-release injection (Vivitrol): 380 mg administered intramuscularly once a month

The monthly injection can be especially helpful for people who have difficulty maintaining a daily pill routine.

Side Effects

Common side effects may include:

• Nausea
• Headache
• Dizziness
• Fatigue
• Anxiety
• Liver function changes (requires monitoring)

People currently dependent on opioids should not use naltrexone. It can trigger sudden, severe withdrawal.

Acamprosate vs Naltrexone- What’s the Difference

The two medications work through entirely different mechanisms. Acamprosate restores the brain’s chemical balance after someone stops drinking. Naltrexone blocks the pleasure and reward response that alcohol triggers. One stabilizes. The other interrupts.

Their timing differs too. Acamprosate is started after a person has already quit drinking. Naltrexone can be started while someone is still drinking or after they stop making it more flexible for people in earlier stages of recovery.

Dosing is another practical difference. Acamprosate requires two tablets three times a day, which demands consistency. Naltrexone offers more options: one tablet daily or a once-monthly injection for those who prefer not to manage daily pills.

Safety profiles also vary. Acamprosate is easier on the liver, making it a better fit for people with liver disease. Naltrexone is the safer choice for those with kidney problems, but it requires liver monitoring during use.

The target symptoms also differ. Acamprosate addresses emotional distress during abstinence, insomnia, restlessness, and cravings tied to neurochemical imbalance. Naltrexone targets cravings triggered by alcohol cues or memories, reward-seeking behavior, and the urge to continue drinking once started. In short: acamprosate is preventive. Naltrexone is responsive.

Which One Is Right for You?

Both medications have helped many people recover from alcohol use disorder. But they are not interchangeable. The right choice depends on several personal factors.

Your Stage in Recovery

If you have already stopped drinking and want support staying sober, acamprosate may be more appropriate. If you are still struggling with cravings or experiencing relapse triggers, naltrexone may better address those urges.

When to use Acamprosate vs Naltrexone

• Choose acamprosate if you are aiming for complete abstinence and want to stabilize brain chemistry after quitting.
• Choose naltrexone if you are still drinking, trying to reduce consumption, or want to prevent relapse during early recovery.

Your Medical History

• Liver disease? Acamprosate is the safer option.
• Kidney problems? Naltrexone is the safer option.
• Currently using opioids? Avoid naltrexone entirely.

Medication Preference

• Can you commit to three doses a day at consistent times? Acamprosate may work for you.
• Prefer once-daily dosing or a monthly injection? Naltrexone may be the better fit.

Every situation is different. The decision should always be made with a doctor who has experience in addiction medicine.

Combining Medication with Therapy and Support

No medication works alone. Combining behavioral therapy, counseling, support groups, and outpatient or residential rehab programs with medication consistently improves recovery outcomes.

The best treatment for alcohol use disorder is the one that fits your goals, your biology, and where you are right now. A therapist or addiction medicine doctor can help you figure out what that looks like.

Ready to Take Control of Your Recovery Journey?

Struggling with alcohol does not define you. Choosing to get help does. Alcohol use disorder affects millions of people and families across the country. It can strain relationships, damage health, and take a real toll on everyday life. But no matter how long someone has been struggling, recovery is possible. The key is finding the right treatment approach for the individual.

Our team at The Hope House is here to guide you through every step. Whether you have questions about acamprosate vs naltrexone or are ready to start a treatment program, we are here. Call now and take back your life.

Recovery is not just about stopping alcohol use. It is about rebuilding health, rediscovering purpose, and learning to live without depending on a substance to get through the day. That kind of change takes time, support, and the right tools. You deserve all of it.