Atenolol tablets can be used for the treatment of cardiac arrhythmia, blood pressure and so on. Atenolol tablets is a selective β1-adrenergic receptor blocker, can reduce acute myocardial infarction 0-7 days of mortality, and can reduce blood pressure to a certain extent to reduce myocardial oxygen consumption, commonly used in arrhythmia, hypertension and other conditions of clinical use of drugs. The main adverse effects of atenolol tablets are hypotension and bradycardia, there may also be dizziness, cold limbs, depression, thrombocytopenia, etc. The drug is a prescription drug, need to be used under the guidance or observation of a doctor, and when an adverse reaction occurs, you should immediately seek medical attention to alleviate the symptoms. The drug should not be taken by people with cardiogenic shock and patients with sick sinus syndrome and severe sinus bradycardia. Pregnant women, lactating women, children and other groups of people need to take the drug in accordance with medical advice. The drug is a prescription drug and should be used in strict accordance with medical advice.