<scp>SGLT</scp>‐2 inhibitors and high‐dose acarbose as potential high‐risk combinations for ketosis and ketoacidosis in Asian patients with <scp>T2DM</scp>: A case series

Low-calorie diets should be avoided in patients receiving sodium-glucose cotransporter-2 (SGLT-2) inhibitors to decrease the risk of diabetic ketoacidosis (DKA). High-dose acarbose can decelerate carbohydrate absorption. We detail three cases of diabetic ketosis (DK) following concurrent SGLT-2 inhibitor and high-dose acarbose therapy (acarbose 300 mg/day and dapagliflozin 10 mg/day). Patients, aged 38-63 years with 3-10 years of type 2 diabetes mellitus (T2DM), developed DK, indicated by moderate urinary ketones and high glucose (urine ketone 2+ to 3+ and glucose 3+ to 4+) without acidosis, within 4 days to 1 month post-therapy initiation. Serum glucose was 172.8-253.8 mg/dL; HbA1c was 9.97%-10.80%. The combination therapy was halted, and DK was managed with low-dose intravenous insulin and fluids, followed by intensive insulin therapy. High-dose acarbose with SGLT-2 inhibitors may increase the risk of DK/DKA in Asian patients.