The main ingredient of Betalucil is metoprolol tartrate, and it is difficult to stop the drug should be adjusted to stop the dose slowly, and go to the hospital for treatment if necessary. Metoprolol tartrate is mainly used for the treatment of hypertension, angina and other diseases, should not stop the drug, long-term use of the drug suddenly stop, may appear angina pectoris, myocardial infarction, ventricular tachycardia and other symptoms, so that the original stabilization of the condition worsened. Therefore, if the above symptoms occur, you should first resume the original use of the dose, slowly stop the drug, gradually reduce the dose, generally the process of stopping the drug needs 7 to 10 days, at least 3 days, if the symptoms can not be relieved, you should go to the hospital for treatment in a timely manner. In addition to this, Metoprolol tartrate may also cause lower blood pressure, headache, diarrhea and other adverse reactions, also need to stop the drug to replace the drug, breastfeeding women should be careful to use the drug. If discomfort occurs after discontinuing the drug, you should go to the hospital immediately and follow the doctor’s instructions for treatment.