The Pain Quality Response Profile of Oxymorphone Extended Release in the Treatment of Low Back Pain

The results indicate that oxymorphone ER has different effects on different pain qualities of low back pain. The responsivity of the PQAS items and scales to the results of treatment with an effective and generally well-tolerated dose of an analgesic, and the ability of the PQAS items and scales to discriminate between an active analgesic and placebo, support their validity as outcome measures. The findings support the utility of using pain descriptor measures for (1) identifying the effects of pain treatments on different pain qualities and (2) targeting pain treatments to those patients who experience certain types of pain.