Oral Steroid Taper After Total Knee Arthroplasty

Inclusion Criteria: * Any patient undergoing primary TKA with a diagnosis of osteoarthritis * \> 18 years old * Willingness to undergo randomization * Patients who will be home by postoperative day (POD) #1 to start the dosing schedule that day (includes both ambulatory and POD #1 discharge patients) Exclusion Criteria: * Reported chronic corticosteroid or opiate use prior to surgery * Prior Open Surgery on the Ipsilateral Knee * Primary diagnosis other than osteoarthritis, including avascular necrosis, fracture, septic arthritis, or postoperative traumatic arthritis * American Society of Anesthesiologists (ASA) score ≥ 4 * Reported history of liver disease, renal disease, or diabetes mellitus * Current systemic fungal infection or other local infection * Immunocompromised or immunosuppressed * Current peptic ulcer disease * History of psychosis, heart failure, myasthenia gravis, ocular herpes simplex virus, or systemic sclerosis * Women with reported current pregnancy * Known hypersensitivity to methylprednisolone * ≤ 18 years old * Inability to take oral medications * Unable to provide consent