Abstract
To evaluate the analgesic efficacy and safety of tramadol hydrochloride/diclofenac sodium fixed-dose combination 25 mg/25 mg (FDC 25/25) and 50 mg/50 mg (FDC 50/50) vs tramadol 50 mg (T50) and diclofenac 50 mg (D50) monotherapies in acute postoperative dental pain. Eight sites across Mexico. Adults (N = 829) with moderate to severe pain after third molar extraction. Prospective, randomized, double-blind, diclofenac- and tramadol-controlled, parallel-group, noninferiority, phase 3 trial. Subjects were randomized to receive three doses (one every eight hours) of oral FDC 25/25, FDC 50/50, T50, or D50 over a 24-hour period. Pain intensity and pain relief were evaluated frequently over the 24 hours postdose. Secondary measures included peak pain relief, onset, and duration of effect. The primary objective was to compare the analgesic efficacy and safety of FDC 50/50 or analgesic noninferiority of FDC 25/25 vs D50 or T50. The primary efficacy end point was total pain relief over four hours after dose 1 (TOTPAR4). TOTPAR4 scores showed that FDC 25/25 was noninferior (P < 0.0001, delta = 1.5) and FDC 50/50 was superior (P < 0.0001) to the individual components. All secondary efficacy measures supported these results. The safety profile of FDC 25/25 and FDC 50/50 was consistent with the known safety profile of D50 and T50 monotherapies, with no unexpected safety findings observed. Tramadol/diclofenac FDC 25/25 and FDC 50/50 provide superior analgesia for acute pain after third molar extraction than either of the individual components. Minor adverse effects appeared to be related to the higher doses of tramadol.
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