My 42-year-old female patient has complaints of excessive thirst, micturition, fatigue, and dizziness. She had Grave’s disease 9 months ago. There is hyperglycemia, glucosuria, and ketonuria. Her islet cells antibodies and glutamic acid decarboxylase are on the higher side, confirming LADA.

But no family history of diabetes mellitus. No obesity. Vitals normal. Should I prescribe rapid-acting insulin or metformin works better?