74 patients with adhesive capsulitis at the freezing stage were randomized to be treated with either a single, blind intra-articular corticosteroid injection or oral non-steroidal anti-inflammatory drug (NSAID). The purpose of this study was to determine whether the use of an intra-articular corticosteroid injection would improve pain relief and functional outcomes when compared to oral NSAIDs. Findings indicated significantly enhanced pain relief and improved function and range of motion (ROM) in the corticosteroid injection group compared to the NSAIDs group at 8 weeks. Constant-Murley scores, flexion, abduction, and internal rotation were significantly improved at 12 weeks in the injection group compared to the oral NSAIDs group; however, no significant differences in pain, function, or motion were reported at 12 weeks in any other outcomes.