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Pain is a leading cause of sleep disturbances in medical illness. Providing effective analgesia is considered an important intervention to reduce these sleep disturbances. Opioids remain the treatment of choice to relieve postoperative pain in hospitalized patients. However, their effects on sleep in pain patients or normal subjects remain unclear, as previous studies have been conducted mainly with former opioid addicts. The purpose of this investigation was to evaluate and describe the effects of acute clinical doses of morphine on sleep in healthy pain-free subjects.

Acute Intravenous Administration of Morphine Perturbs Sleep Architecture in Healthy Pain-Free Young Adults: a Preliminary Study