Selegiline works for about 24 hours. You need to consult a medical professional for the exact dosing regimen. Selegiline is mainly indicated for type 2 diabetes and can be used alone or in combination with other medications. When used alone, with diet and exercise control, it can better improve the blood sugar of patients with type 2 diabetes. When used alone is not effective, it can be used in combination with metformin for better blood sugar control. Used in combination with insulin for synergistic therapeutic effects. It is contraindicated for those who are allergic to any of the ingredients in selegiline. This product should not be used in type 1 diabetes or for the treatment of diabetic ketoacidosis, etc. It is recommended that patients who need to use selegiline follow the doctor’s instructions to use the drug, do not self-medication, so as not to lead to adverse consequences.