When taking atenolol tablets orally, you can gradually increase the dosage from 1/4 tablet (25mg per tablet) to a maximum of 8 tablets. The dosage of the drug should strictly follow the doctor’s instructions, and self-medication is strictly prohibited. Atenolol tablets are mainly used in the treatment of angina pectoris, hypertension, myocardial infarction, pheochromocytoma, arrhythmia and hyperthyroidism. II to III degree heart block, cardiogenic shock, sick sinus syndrome, severe sinus bradycardia, pregnant women and those who are allergic to the drug composition of atenolol tablets are forbidden to take. Nursing mothers and allergic individuals should be cautious. Children and patients with renal failure should take the drug strictly in accordance with medical advice, and pay attention to the detection of heart rate and blood pressure. Low blood pressure, gastrointestinal discomfort, fatigue, bradycardia and other adverse reactions may occur after taking the drug. People suffering from these conditions need to take atenolol tablets under the guidance of a professional doctor, starting from a small dose, diet does not affect the efficacy of the drug. The specific dosage of the drug needs to strictly follow the doctor’s instructions.