Both beer and liquor can have an effect on blood sugar, with liquor generally having a greater effect on blood sugar than beer in equal amounts. Generally speaking, liquor is high in alcohol content and produces many calories, which makes it easy for blood sugar to rise after drinking it. Beer is lower than most liquor and contains slightly fewer calories than liquor, so its effect on blood sugar is relatively smaller than that of liquor. Drinking large amounts of alcohol will affect blood sugar, consume liver glycogen, resulting in low blood sugar at that time, or even hypoglycemic reaction. However, long-term heavy drinking will have impaired liver function, and may also affect the function of the pancreas, impairing the function of the pancreatic islets, which will lead to high blood sugar. High blood sugar or diabetic patients are not recommended to drink alcohol, if you feel unwell, consult a doctor in time.