Pharmacology Naltrexone is used to maintain abstinence following opioid withdrawal in addicts. It blocks all of the following features of opioid use, except. A Euphoriant effects of opioids B Craving for opioids C Miosis D Respiratory depression 💡 Explanation Naltrexone is used to maintain abstinence following opioid withdrawal in addicts. It blocks all of the following features of opioid use, except. ✓ Correct Answer: B. Craving for opioids