Inclusion Criteria:  Any patient undergoing primary TKA with a diagnosis of osteoarthritis ≥ 18 years old ROM <90° by 3 weeks postoperatively without improvement to >90° by 6 weeks Requiring a 30-pill oxycodone refill NSAID allergy Thigh circumference discrepancy >2cm between legs from 3 to 6 weeks Defense and Veterans Pain Rating Scale (DVPRS) > 5 between 3 and 6 weeks Willingness to undergo randomization  Exclusion Criteria:  Reported chronic corticosteroid or opiate use Suspected or confirmed periprosthetic joint infection Revision TKA Primary diagnosis other than osteoarthritis, including avascular necrosis, fracture, or post-traumatic arthritis American Society of Anesthesiologists (ASA) score ≥ 4 Reported history of liver or renal disease Uncontrolled diabetes Immunosuppression ≤ 18 years old Inability to take oral medications Unable to provide consent