Naltrexone 3mg
Generic For: Low Dose Naltrexone
Naltrexone is an opioid antagonist that is FDA-approved to treat alcohol use disorder and to help prevent relapse to opioid dependence. Naltrexone 3mg capsules, commonly called low dose naltrexone (LDN), are a compounded low-dose form prescribed off-label by some providers for conditions such as chronic pain and fibromyalgia. Your order ships from a licensed U.S. pharmacy after review of your valid prescription by a licensed provider.
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Buy Naltrexone 3mg (Low Dose Naltrexone) Online
An opioid antagonist used for alcohol use disorder, opioid dependence, and — at low doses — off-label support for chronic pain and inflammatory conditions
Naltrexone 3mg Quick Facts
| Drug class | Opioid antagonist |
|---|---|
| Treats | Alcohol use disorder, opioid dependence (relapse prevention), off-label chronic pain (low dose) |
| Form | Capsule |
| Typical dosing | Take 1 capsule by mouth daily |
| Prescription required | Yes — prescription only |
What Is Naltrexone 3mg?
Naltrexone is a prescription medication that blocks opioid receptors in the brain. At its standard FDA-approved strength (50mg), it is used to treat alcohol use disorder and to block the effects of opioids in people who have completed opioid detoxification. Naltrexone 3mg, known as low dose naltrexone (LDN), is a compounded capsule prescribed off-label; some providers use it for chronic pain, fibromyalgia, and certain inflammatory conditions, though these uses are not FDA-approved. It is not an opioid, is not addictive, and does not cause physical dependence.
What Does Naltrexone 3mg Treat?
Alcohol use disorder (FDA-approved, standard dose)
Prevention of relapse to opioid dependence after detoxification (FDA-approved, standard dose)
Blockade of the effects of exogenous opioids (FDA-approved, standard dose)
Chronic pain (off-label, low dose)
Fibromyalgia (off-label, low dose)
Certain inflammatory and autoimmune conditions (off-label, low dose)
Naltrexone 3mg Dosage
FDA-approved (naltrexone 50mg tablets): 50 mg by mouth once daily.
Low dose naltrexone 3mg (compounded, off-label): typically 1 capsule (3 mg) by mouth once daily, often at bedtime, exactly as prescribed.
Take only as directed by your prescriber.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Naltrexone 3mg Side Effects
Common side effects
- Nausea
- Headache
- Dizziness
- Insomnia or vivid dreams
- Fatigue
- Anxiety or nervousness
- Abdominal pain or cramps
- Joint or muscle aches
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Signs of liver injury (dark urine, yellowing of skin or eyes, severe abdominal pain)
- Severe allergic reaction (rash, swelling, difficulty breathing)
- Depression or suicidal thoughts
- Severe injection-site or skin reactions
- Precipitated opioid withdrawal (agitation, sweating, vomiting) if opioids are in your system
Warnings & Interactions
Do not use if currently taking opioids or in acute opioid withdrawal — can cause sudden, severe withdrawal
Do not use with opioid-containing medicines, including some cough, cold, and anti-diarrheal products
Opioid pain medicines will not work while taking naltrexone; attempting to overcome the blockade can cause fatal overdose
Risk of opioid overdose after stopping naltrexone due to reduced opioid tolerance
Use with caution in liver or kidney disease; liver injury has been reported
Tell your provider if you are pregnant, planning pregnancy, or breastfeeding
Carry medical identification noting that you take naltrexone
Tell your prescriber about all medications, supplements, and health conditions before starting naltrexone 3mg.
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