The generic name for Betaloc is Metoprolol Succinate Extended-Release Tablets. The instructions for this product do not specify any side effects of the 47.5g dose of the drug over a long period of time, but taking Metoprolol Succinate Extended-Release Tablets may produce adverse reactions such as depression, nightmares, poor sleep quality, fatigue, dizziness and headache, abnormal sensations, cold extremities, bradycardia, palpitations, and temporary worsening of heart failure. Metoprolol succinate extended-release tablets are indicated for the treatment of hypertension, angina pectoris or chronic heart failure with stable symptoms accompanied by abnormal left ventricular systolic function. It is contraindicated in patients with hypersensitivity to the components of the product, in patients with cardiogenic shock, in patients receiving continuous or intermittent treatment with beta agonists with orthostatic potentiation, in patients with heart failure, and in patients with severe peripheral vascular disease with risk of gangrene. If you need to use Metoprolol succinate extended-release tablets, please consult a medical professional, follow the doctor’s instructions, and use medication wisely.