A 28-year-old patient with a known history of hypothyroidism, type 2 diabetes mellitus (T2DM) on SGLT2 inhibitors, polycystic ovarian syndrome (PCOS) and mixed anxiety-depressive disorder presented to the accident and emergency department with palpitations, chest discomfort and focal seizures reported by her partner and family. This evidence concerns the gene SLC5A2 and diabetes mellitus.