Metoprolol succinate extended-release tablets should be taken according to the patient’s condition and the doctor’s advice, such as hypertension usually take 47.5-95mg, and angina pectoris usually take 95-190mg. Usually, patients with hypertension are recommended to take 47.5-95mg orally once a day in the morning or twice a day in the morning and evening. Patients with angina pectoris are recommended to take 95-190mg once a day. Metoprolol succinate extended-release tablets are best taken in the morning, can be broken up and taken, but not chewed or crushed, and should be taken with half a glass of warm water. Metoprolol succinate extended-release tablets can be taken in the morning before or after meals, for patients with peptic ulcers. Adverse effects of metoprolol succinate extended-release tablets are dizziness and headache, abdominal pain, nausea, vomiting, diarrhea as well as constipation, and bradycardia. It should be used with caution in lactating women and is contraindicated in bradycardia as well as in athletes. If patients need to take this drug, it is recommended to go to the hospital, according to the doctor’s instructions for the use of medication, do not recommend blind use of drugs.