Efficacy and Safety of Etoricoxib/Betamethasone Combination in Acute Bursitis, Tendinitis and Synovitis

This is a Phase III, multicenter, prospective, randomized, double-blind, parallel-group study to compare the efficacy and safety of a fixed-dose combination of etoricoxib/betamethasone versus etoricoxib alone in patients with an acute episode of bursitis, tendinitis, or synovitis of the shoulder, elbow, knee, or ankle. Eligible participants will be randomized to receive either etoricoxib/betamethasone 90 mg/0.25 mg once daily for 14 days (Group A) or etoricoxib 90 mg once daily for 14 days (Group B). The study includes three visits (Day 1 baseline, Day 7 ± 2, Day 14 ± 2) and two follow-up calls (Day 3 ± 2 and Day 10 ± 2); investigators will collect medical history, perform physical examinations focused on the affected region, and review laboratory and diagnostic assessments as applicable. Pain intensity in the affected joint will be assessed using a Visual Analog Scale (VAS) during active movement and at rest at each visit/call, and daily by patients in a trained Patient Diary completed in the afternoon at the same time each day. Outcomes include changes from baseline in maximum pain (movement and rest) over 14 days, clinical improvement at Days 7 and 14 using the Clinical Global Impression scale, patient and investigator global assessments, and safety based on adverse events summarized by treatment group; rescue medication use (paracetamol 500 mg) and treatment adherence will also be evaluated.