The purpose of this study is to evaluate the safety and efficacy of the study drug ZILRETTA (Triamcinolone Acetonide, extended release) compared to a placebo (saline solution) and the current treatment of TCA-IR (Triamcinolone Acetonide, immediate release). The study drug is administered through an ultrasound-guided injection to the affected shoulder. Forty percent of subjects will receive Zilretta, forty percent will receive TCA-IR and twenty percent will receive placebo.
The study Drug ZILRETTA, is currently FDA-approved for knee osteoarthritis and is being investigated in this study for treatment of shoulder osteoarthritis. The study population consists of adults 50-85 years of age, BMI under 40, who have been diagnosed with Osteoarthritis of the shoulder by x-ray and has had pain for over 15 days out of the past month. The study has 10 study visits over 24-week's and will include, but is not limited to a questionnaire, medical examination, shoulder x-ray and blood draws. Each visit should last less than 1 hour, depending on the procedures performed. The most common side effects of the study drug are joint pain, headaches, upper respiratory infections, back pain, joint swelling, and cold symptoms.