Adults: Hypertension: Therapy should be initiated with 50 mg of atenolol daily. This may be increased up to a maximum of 100 mg/day in divided doses. Where patients are controlled in daily doses of 50-100 mg, this may be given once daily. Doses >100 mg daily should be given on a divided basis. When necessary, a further reduction in blood pressure may be achieved by combining atenolol with other antihypertensive agents. Patients can be transferred to atenolol from other antihypertensive treatments with exception of clonidine.
Angina Pectoris: Therapy should be initiated with 50 mg of atenolol daily. This may be increased, if required, to 100 mg daily given as a single or divided dose.
Cardiac Dysrhythmias: Having controlled dysrhythmias with IV atenolol, a suitable oral maintenance dosage of 50-100 mg daily should be given or as prescribed by the physician.