Succinic Acid is Metoprolol Succinate Extended-Release Tablets, Metoprolol Succinate Extended-Release Tablets can be taken half a tablet a day for the treatment of patients with mild symptoms, but it should not be chewed or crushed. Patients should choose the dosage reasonably according to their own conditions and under the guidance of the doctor. Metoprolol succinate extended-release tablets are commonly used clinically for the treatment of hypertension, angina pectoris, and symptomatic stable chronic heart failure accompanied by abnormal left ventricular systolic function. Common adverse reactions to metoprolol succinate extended-release tablets include fatigue, dizziness, headache, chills in the extremities, bradycardia, palpitations, shortness of breath on exercise, abdominal pain, nausea, vomiting, diarrhea, and constipation. Contraindications to metoprolol succinate extended-release tablets include cardiogenic shock, morbid sinus node syndrome, second- and third-degree atrioventricular block, unstable, decompensated heart failure treated with beta agonist orthostatic therapy, symptomatic bradycardia or hypotension, acute myocardial infarction, and severe peripheral vascular disease with risk of gangrene. In addition, metoprolol succinate extended-release tablets are contraindicated in patients with hypersensitivity to metoprolol succinate extended-release tablets or other beta-blockers, and should be used with caution during the last trimester of pregnancy and before and after delivery. If you need to use Metoprolol Succinate Extended-Release Tablets, please consult a professional doctor and follow the doctor’s instructions to regulate the treatment, not blindly take the drug.