Betaloc 25mg dosage form is usually taken 2 to 3 times a day, and the specific dosage should follow the physician’s instructions. Patients should follow the principle of individualization when taking Betalucil dosage and frequency. When the treatment of hypertension, 100 mg to 200 mg per day in 1 to 2 oral; treatment of angina pectoris, arrhythmia, hypertrophic cardiomyopathy is generally 20 to 50 mg, 2 times a day; the treatment of heart failure, initially a 6.25 mg, 2 to 3 times a day, the maximum dose can be used to a 50 to 100 mg, 2 times a day. The plasma half-life of bethanechol is 3-5 hours, and depending on its metabolism time it is usually necessary to take it 2-3 times a day. This drug is contraindicated in patients with cardiogenic shock; morbid sinus node syndrome; second- or third-degree AV block; and unstable, decompensated heart failure. Adverse reactions include fatigue, headache, dizziness, chills in the extremities, bradycardia, rapid heartbeat with panic, abdominal pain, nausea, vomiting, diarrhea, and constipation. This medication needs to be used regularly under the guidance of a doctor and should not be used to adjust the medication regimen on its own.