Because of the current conflicting evidence, the lack of long-term follow-up, and the multiple potential benefit benefits to the society, the investigators aim to compare subacromial ketorolac versus methylprednisolone for the treatment of shoulder impingement syndrome. The investigators hypothesize that patients with shoulder impingement treated with a subacromial methylprednisolone versus ketorolac have similar outcomes based on the ASES (American Shoulder and Elbow Surgeon) self-assessment score. The study will be performed at one institution, the University of Texas Medical Branch.
