Context: Thyroid hormone management in older adults is complicated by comorbidities and polypharmacy.
Objective: Determine the prevalence of concurrent use of thyroid hormone and medications that can interfere with thyroid hormone metabolism (amiodarone, prednisone, prednisolone, carbamazepine, phenytoin, phenobarbital, tamoxifen), and patient characteristics associated with this practice.
Design: Retrospective cohort study between 2004 and 2017 (median follow-up, 56 months).