Naltrexone is a prescription medication mainly used to treat addiction-related conditions. It works by blocking opioid receptors in the brain, which reduces the effects of certain substances.
Main Uses of Naltrexone
- Opioid Dependence (Addiction)
- Used for people addicted to opioids (like heroin or morphine).
- It blocks the “high” feeling, helping prevent relapse.
- Often given after detoxification is completed.
- Alcohol Dependence
- Helps reduce the urge (craving) to drink alcohol.
- Can lower the amount of alcohol consumed and support recovery.
- Off-label Uses (less common)
Doctors sometimes prescribe it for:
- Certain behavioral addictions (like gambling)
- Weight management (in combination with other drugs)
- Some mental health conditions (research ongoing)
How It Works
Naltrexone is an opioid antagonist, meaning it:
- Blocks opioid receptors
- Prevents pleasure from opioids and reduces cravings
Important Notes ⚠️
- Must not be taken if opioids are still in the body (can cause sudden withdrawal symptoms)
- Can cause side effects like nausea, headache, dizziness
- Available as:
- Tablets (daily use)
- Injection (monthly, long-acting)
Common Brand Names
- Revia
- Vivitrol