Effectiveness of Corticosteroid vs. Ketorolac Shoulder Injections: A Prospective Double-Blinded Randomized Trial

Inclusion Criteria: * Rotator Cuff Tendinitis * Atraumatic Rotator Cuff Tear * Rotator Cuff Tear Arthropathy * Subjects who speak English Exclusion Criteria: * Age: \< 18 years old * Prior Shoulder Surgery * Fracture * Acute Traumatic Rotator Cuff Tear * Infection * Uncontrolled Diabetes Mellitus (HbA1c \>8) * Recent Prior Shoulder Injection in either the Subacromial space * Workers Compensation * History of Gastric Ulcers * Tumor Involving the Shoulder Region * Prior history of gastrointestinal bleeding, allergic reactions, impaired renal function, seizures or cardiac arrhythmias * Subject unable to provide informed consent * Subjects who don't speak English * Patients who are pregnant or lactating at time of screening or are of child bearing age * Patients currently receiving an aspirin, NSAID regimen or any other anti-inflammatory agents that could affect inflammation response. * Patients with any bleeding disorders. * Patients with severe renal failure. * Patients likely to have severe problems maintaining follow-up, including patients diagnosed with severe psychiatric conditions, patients who live too far outside the hospital's catchment area, patients who are incarcerated and patients who have unstable housing situations. * Patients who are allergic to aspirin, ketorolac tromethamine and other NSAIDs