Selegiline and dagliflozin are usually not comparable and there is no such thing as which one is better, you need to choose the right medication for your condition. Usually selegiline and dagliflozin are both hypoglycemic drugs. Dagliflozin is mainly used for the treatment of type 2 diabetes, but can not be used for the treatment of type 1 diabetes or diabetic ketoacidosis; selegiline is used in conjunction with dietary control and exercise, to improve blood glucose control in patients with type 2 diabetes. Selegiline may cause abdominal pain, nausea, constipation, muscle pain and other discomforts after use, and is contraindicated for those who are allergic to the components of the drug; Dagliflozin may cause hypotension, ketoacidosis, renal impairment, etc., and it is necessary to monitor the blood pressure and renal function in the process of using the drug, and is also contraindicated for those who have severe renal impairment and end-stage renal disease. If you need to use the drug, it is recommended to use the drug under the guidance of a doctor, not blindly self-medication to avoid adverse effects.