Inclusion Criteria:  Informed Consent as documented by signature Age 18 years or older Gastric bypass surgery ≥1 year ago Biochemically confirmed postprandial hypoglycaemia (plasma or sensor glucose <3.0mmol/l) within the past three months  Exclusion Criteria:  Diabetes on anti-diabetic treatment (insulin and/or non-insulin agents) Genito-urinary infection, if not treated successfully Chronic kidney disease (defined as CKD-EPI eGFR < 60 mL/min per 1.73 m2 body surface area) Pregnant and lactating women (urine pregnancy test to be performed for women of childbearing potential [defined as women who are not surgically sterilized/ hysterectomized, and/ or who are postmenopausal for less than 12 months]) or women of childbearing potential that refuse to use an effective contraceptive method [birth control pill or intrauterine device (IUD)]). Inability to understand and follow the protocol Known allergy to the study drug Participation in another interventional clinical trial overlapping with the current trial