naltrexone hydrochloride

A drug that opposes the action of opioids (such as heroin) and is used to help maintain a drug-free habit in people who were formerly dependent on opioids. Naltrexone is usually started after the individual has abstained from taking opioid drugs for at least 7–10 days. It is available as tablets on prescription only.

Side effects:
include nausea, vomiting, abdominal pain, anxiety, nervousness, difficulties in sleeping, headache, reduced energy, and joint and muscle pain. Less frequently there may be mood changes and decreased potency.

Precautions:
naltrexone should not be taken by people who are still dependent on opioids. Liver function should be monitored before and during treatment.

Proprietary preparations:
Nalorex; Opizone.

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