• Clin J Pain · Oct 2014

    Randomized Controlled Trial Multicenter Study

    A Phase 2 Study of Lower-dose, Indomethacin Submicron Particle Capsules Demonstrates Early Onset of Acute Pain Relief.

    • Garen Manvelian, Marc C Hochberg, Stephen E Daniels, Roy D Altman, and Clarence L Young.
    • *MIG Clinical Research Consulting, San Diego †Division of Rheumatology & Clinical Immunology, University of Maryland School of Medicine, Baltimore, MD ‡Premier Research Group International, LLC, Austin... more , TX §UCLA Medical Center RHU, Los Angeles, CA ∥Iroko Pharmaceuticals LLC, Philadelphia, PA. less
    • Clin J Pain. 2014 Oct 1;30(10):846-51.

    ObjectivesNonsteroidal anti-inflammatory drugs are efficacious for the treatment of acute and chronic pain; however, they have the potential for serious adverse events (AEs). The objective of this study was to evaluate the efficacy and safety of investigational, lower-dose, indomethacin submicron particle capsules compared with placebo in a study of patients with postsurgical pain.Materials And MethodsThis phase 2, multicenter, randomized, double-blind, single-dose, and placebo-controlled study enrolled 203 patients (18 to 50 y old) following extraction of ≥ 2 third molars who experienced moderate-to-severe pain intensity ≤ 6 hours after surgery. Patients received indomethacin submicron particle capsules (20 or 40 mg), celecoxib 400 mg, or placebo. The primary efficacy endpoint was the sum of total pain relief over 0 to 8 hours (TOTPAR-8) determined from the area under the curve for pain relief over 0 to 8 hours following administration of the study drug, where pain relief was measured on a 0 to 4 scale. Safety and tolerability were also assessed.ResultsMean ± SE TOTPAR-8 scores were 10.8 ± 1.4 (indomethacin submicron particle capsules 20 mg), 12.6 ± 1.3 (indomethacin submicron particle capsules 40 mg), 14.8 ± 1.3 (celecoxib), and 3.0 ± 1.3 (placebo; P<0.001 for active treatments vs. placebo). Indomethacin submicron particle capsules treatment groups demonstrated better mean TOTPAR over 4 hours than placebo (P<0.001). Similar rates and profiles of treatment-emergent AEs were reported by patients across treatment groups.DiscussionLower-dose, indomethacin submicron particle capsules provide good overall pain relief in patients with postsurgical pain and are generally well tolerated. Indomethacin submicron particle capsules are a potentially promising option for treatment of acute pain and warrant further study.

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