It is not possible to generalize how many units of long-acting glucagon insulin to take 20, but the dosage needs to be adjusted according to the blood sugar and the condition. Long-acting glucagon insulin dosage needs to be set according to the blood glucose level as well as the required target value, and usually the dosage used is based on kilogram of body weight, 0.2-0.3 units of insulin per kilogram of body weight, and the dosage is adjusted according to the blood glucose. If blood glucose control is high, the dosage of injected long-acting insulin needs to be increased; if blood glucose control is good, the current dosage can be maintained under relatively stable conditions; if blood glucose control is low, the dosage of insulin can be appropriately reduced. So as to how much is 20 units of long-acting glucagon insulin, it needs to be assessed comprehensively according to the blood glucose control situation. You can consult the doctor at the professional hospital to adjust the dosage according to the patient’s blood glucose and condition, so as to control the blood glucose better and avoid the adverse reactions such as hypoglycemia.