Brand Name: ReVia. Vivitrol (injection).
Generic Name: Naltrexone \nal-ˈtrek-ˌsōn\
Pharmacology: Naltrexone blocks opioid receptors, preventing opiate medications, heroin, and endorphins from having effects.
Contraindications: Liver disease. Recent use of opiates.
Dosage Forms: 50 mg tablet.
Dosing: 25 mg for two days and then 50 mg thereafter as tolerated.
Maximum Dose: 100 mg daily.
Habit Forming: No
Pregnancy: Risk Category C (animal studies do not show adverse effects, but no controlled studies in humans).