In this episode, Dr Kevin Fernando discusses diagnostic and management tips – as well as pitfalls to avoid – related to subclinical hyperthyroidism. Fatima is a 71-year-old woman who presents in primary care with non-specific malaise and a past medical history of atrial fibrillation, ischaemic heart disease and osteoporosis. On examination, there is no evidence of thyroid swelling. Her blood tests reveal a suppressed thyroid-stimulating hormone (TSH), but normal free thyroxine (FT4) and free triiodothyronine (FT3). Given Fatima's comorbidities, what should we do next?