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  • Title: Comparison of the analgesic efficacy of rofecoxib and enteric-coated diclofenac sodium in the treatment of postoperative dental pain: a randomized, placebo-controlled clinical trial.
    Author: Chang DJ, Desjardins PJ, Chen E, Polis AB, McAvoy M, Mockoviak SH, Geba GP.
    Journal: Clin Ther; 2002 Apr; 24(4):490-503. PubMed ID: 12017395.
    Abstract:
    BACKGROUND: Rofecoxib is a selective cyclooxygenase-2 inhibitor indicated for the treatment of acute pain, with similar analgesic efficacy to ibuprofen and naproxen sodium. Diclofenac sodium is the most commonly prescribed nonsteroidal anti-inflammatory drug worldwide; it is effective for the treatment of pain as well as the signs and symptoms associated with the painful conditions of osteoarthritis and rheumatoid arthritis. OBJECTIVE: The aim of this study was to compare the analgesic efficacy and tolerability of a single dose of rofecoxib 50 mg, 3 doses of enteric-coated diclofenac sodium 50 mg, and placebo over 8-hour and 24-hour periods in patients with moderate to severe pain after oral surgery. METHODS: In this double-blind, placebo- and active comparator-controlled, parallel-group study, patients experiencing moderate to severe pain after the surgical extraction of > or = 2 third molars were randomized to receive a single dose of rofecoxib 50 mg, 3 doses of enteric-coated diclofenac sodium 50 mg (50 mg given every 8 hours), or placebo. Patients rated pain intensity, pain relief, and global assessments at prespecified times throughout the 24-hour period after initial dosing. Overall analgesic efficacy was determined by total pain relief over 8 hours (TOPAR8) and 24 hours (TOPAR24) and patient global assessments at 8 and 24 hours. Onset of analgesic effect was determined by using the 2-stopwatch method for confirmed perceptible pain relief. Peak analgesic effect was the maximum pain relief attained during the first 8 hours. The duration of analgesic effect was determined by median time to rescue analgesia use. RESULTS: A total of 305 patients were randomized to treatment: 121 received rofecoxib, 121 received diclofenac sodium, and 63 received placebo. The baseline demographics were similar among the groups. Overall, 61.3% experienced moderate pain and 38.7% experienced severe pain; 53.1% were female; and the mean age was 23.4 years. The overall analgesic efficacy, as assessed by TOPAR8, of a single dose of rofecoxib 50 mg was significantly greater than a single dose of enteric-coated diclofenac sodium 50 mg (20.5 vs 8.2) and placebo (20.5 vs 5.9). Patient global assessment at 8 hours was also significantly better for rofecoxib compared with enteric-coated diclofenac sodium and placebo. TOPAR24 was significantly greater for a single dose of rofecoxib 50 mg compared with 3 doses of enteric-coated diclofenac sodium 50 mg (64.1 vs 25.1) and placebo (64.1 vs 19.2). At 24 hours, the patient global assessment for rofecoxib was significantly better than that achieved with enteric-coated diclofenac sodium and placebo. The onset of analgesic effect was significantly more rapid for rofecoxib than for enteric-coated diclofenac sodium and placebo (median times: 31 minutes, >4 hours, and >4 hours, respectively). The peak analgesic effect was significantly greater for rofecoxib compared with enteric-coated diclofenac sodium (3.2 vs 1.5) and placebo (3.2 vs 1.1). The duration of analgesia was significantly longer for rofecoxib than enteric-coated diclofenac sodium (median times: >24 hours vs 1 hour and 37 minutes) and placebo (>24 hours vs 1 hour and 37 minutes). Enteric-coated diclofenac sodium was numerically greater than placebo for the key end points measuring overall efficacy (total pain relief and patient global assessment), but diclofenac sodium did not provide as much analgesic effect as expected for a drug effective for pain, osteoarthritis, and rheumatoid arthritis and did not differ significantly from placebo. Overall, both rofecoxib and enteric-coated diclofenac sodium were generally well tolerated, although the rofecoxib group had a significantly lower incidence of clinical and drug-related adverse events than the enteric-coated diclofenac sodium group. CONCLUSIONS: A single 50-mg dose of rofecoxib provided greater overall analgesic efficacy over 8 hours, more rapid onset of analgesia, greater maximum analgesic effect, and longer duration of effect than a single 50-mg dose of enteric-coated diclofenac sodium in patients with moderate to severe pain associated with oral surgery. Compared with 3 doses of enteric-coated diclofenac sodium 50 mg (50 mg every 8 hours), a single dose of rofecoxib 50 mg provided greater overall analgesic efficacy over 24 hours.
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