Medically reviewed by Lindsay Cook, PharmD Naloxone and naltrexone are opioid antagonists that block the effects of opioids and other street drugs. These drugs belong to the same class but have ...

It’s not known whether Vivitrol (naltrexone) is safe to receive while pregnant or breastfeeding. Certain factors, including the risks of not treating your condition during pregnancy, may ...

Compared with placebo, extended-release naltrexone-bupropion combination therapy reduced total fat mass and improved the lean-to-fat mass ratio in individuals with obesity or overweight and ...

Although it's been used since the 1980s, naltrexone remains a relatively unknown treatment for alcohol dependency. Costing around £3 per pill, the drug blocks the "euphoric and sedative effects ...