Atermin - Pharmacological action Atenolol is a cardioselective beta1-blocker without intrinsic sympathomimetic activity. This medication has antihypertensive, antianginal and antiarrhythmic action. Atenolol reduces the stimulatory effect on the heart sympathetic innervation and circulating catecholamines. The hypotensive effect of this drug is associated with a decrease in minute volume of blood, decreased activity of the renin-angiotensin system (has a greater significance for patients with...