title: Efficacy of oxymorphone extended release in postsurgical pain: a randomized clinical trial in knee arthroplasty.
abstract: Patients with moderate or severe pain following knee arthroplasty and washout from standard patient-controlled analgesia (PCA) were randomized to receive 20 mg of an extended-release (ER) oxymorphone formulation (n = 65) or placebo (n = 61) q12h for 1 day. Oxymorphone PCA was used as rescue analgesic. Oxymorphone ER provided significant improvements over placebo for most standard single-dose analgesic parameters, including mean total pain relief (TOTPAR) over 0 to 12 hours (19.30 vs. 13.72; p = 0.0056), as well as for all multiple-dose (24-h) efficacy assessments. Oxymorphone-treated patients used significantly less rescue PCA than those who received placebo (p < 0.02). Adverse events such as nausea and constipation were typical of opioids, and laboratory and physical findings were similar between groups. Oxymorphone ER was effective and generally well tolerated. A single dose was active from 2 hours until > or = 12 hours after administration. Comparisons with other oral opioids are warranted, especially in the setting of outpatient and day surgery.
authors.affiliation: Clinical Operations, Endo Pharmaceuticals Inc., Chadds Ford, PA 19317, USA.
authors.forename: Harry
authors.initials: H
authors.lastname: Ahdieh
authors.forename: Tina
authors.initials: T
authors.lastname: Ma
authors.forename: Najib
authors.initials: N
authors.lastname: Babul
authors.forename: David
authors.initials: D
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000701:Analgesics, Opioid / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D003692:Delayed-Action Preparations; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010111:Oxymorphone / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D010149:Postoperative Pain / Q000188:drug therapy*
chemical_list: D000701:Analgesics, Opioid; D003692:Delayed-Action Preparations; D010111:Oxymorphone