Metoprolol Tartrate Tablets, known generically as Betalucil, do not usually cause AV block if taken in the normal way; however, they may cause AV block if the medication is not administered properly or in excessive dosage. For most patients, taking metoprolol tartrate tablets in strict accordance with the doctor’s instructions and having regular visits to the hospital to monitor the heart rate during the medication period are generally not likely to cause AV block. These patients are treated in a timely manner and the efficacy of the treatment is clear. However, if the administration of metoprolol tartrate tablets is not carried out according to the doctor’s advice, and the medication is often taken without authorization or in large doses, it may cause slowing of the heart rate, which may lead to atrioventricular block, and the blood pressure will be lowered accordingly. In some patients, high doses of Metoprolol Tartrate Tablets may cause heart failure. The use of metoprolol tartrate tablets requires regular observation, and is contraindicated in case of hypersensitivity to the ingredients of the product, during lactation as well as during pregnancy. It is also contraindicated if you suffer from bradycardia or cardiogenic shock. In case of dizziness, head swelling, weakness during the use of the drug. Taking Metoprolol Tartrate Tablets must be under the guidance of a professional physician, during which you should not stop or increase the dosage without authorization, otherwise it will lead to the rebound of the disease, which is not conducive to control.