Pain practice : the official journal of World Institute of Pain
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This study evaluated the clinical effects and pattern of use of AVINZA((r)), morphine sulfate extended-release tablets, under real-world treatment conditions. Opioid-naive subjects or subjects who have failed other opioids were eligible if they had chronic moderate-to-severe noncancer pain with an average pain score > or =4 (0-10 scale) in the preceding month. Subjects answered in-depth monthly questionnaires in three months. ⋯ Two hospitalizations for nausea and vomiting were the only reported drug-related serious adverse events. This study showed that once-daily AVINZA significantly reduced pain scores, and resulted in improved sleep and physical functioning in patients with chronic moderate-to-severe pain. These results were achieved with a stable daily morphine dose over the three-month study period.