Betaloc is the trade name of metoprolol tartrate, generally speaking, oral metoprolol for diabetic patients is not particularly significant effect on blood glucose, it is recommended to take the drug under the guidance of a doctor. The effect of metoprolol on insulin release and glucose metabolism is less than that of non-selective beta-blockers, and thus it can be used in diabetic patients. Metoprolol has less effect on cardiovascular responses to hypoglycemia, such as tachycardia, and blood glucose returns to normal levels more quickly than nonselective beta-blockers. Metoprolol tartrate is a commonly used beta-blocker in clinical practice and is commonly used for antihypertensive, antiarrhythmic, and anti-heart failure therapy. The action of metoprolol tartrate on beta receptors has a certain degree of selectivity, which selectively acts on the beta1 subtype of beta receptors, and the target of action is mainly in the heart. Patients with diabetes are advised to seek prompt medical attention if discomfort occurs.