Atenolol can be taken for a long time, the specific medication is recommended to be taken under the guidance of a doctor in accordance with the prescribed dose. Atenolol can be used for the treatment of angina pectoris, hypertension, myocardial infarction, arrhythmia and other diseases, if the patient in the period of taking the drug renal function damage, is not recommended for long-term use, need to reduce the dose, patients suffering from heart failure in the drug did not alleviate the symptoms, should also reduce the dose, if the patient in the period of no obvious side effects, you can be in the guidance of the doctor to take a long time. Hypertensive patients suffering from chronic obstructive pulmonary disease, athletes, pregnant and lactating women should be cautious, cardiogenic shock, II-III degree heart block, severe sinus bradycardia and sick sinus syndrome is prohibited. Patients may experience adverse reactions such as bradycardia, hypotension, fatigue, cold extremities, gastrointestinal discomfort, alopecia, rash, and mental depression while taking the drug. This drug is a prescription drug and patients are advised to follow the doctor’s instructions and use the drug according to the dosage.