Sleep improves when patients with chronic OA pain are managed with morning dosing of once a day extended-release morphine sulfate (AVINZA): findings from a pilot study.

Study Objective: To investigate the effect of once-a-day extended release of morphine sulfate AVINZA (A-MQD) on polysomnographic measures of sleep in a population of chronic osteoarthritic pain patients with sleep difficulties.

Design: Single-center, single-blind, placebo-lead-in, 30 mg or 60 mg. Patients' sleep and neurocognition were objectively measured at a sleep laboratory, and patients self-rated their pain, sleep, and other functions.