ATENOLOL is a beta-blocker. Beta-blockers reduce the workload on the heart and help it to beat more regularly. This medicine is used to treat high blood pressure and to prevent chest pain. Combined use of beta-blockers and calcium channel blockers with negative inotropic effects, e.g. verapamil and diltiazem, can lead to an exaggeration of these effects particularly in patients with impaired ventricular function and/or sinoatrial or atrioventricular conduction abnormalities. Atenolol is a prescription drug used to treat high blood pressure. Learn about side effects, drug interactions, dosages, warnings, and more. Antihypertensives are a class of drugs that are used to treat hypertension (high blood pressure). Antihypertensive therapy seeks to prevent the complications of high blood pressure, such as stroke and myocardial infarction. Abrupt discontinuation of any beta-adrenergic blocking agent, including atenolol, particularly in patients with preexisting cardiac disease, can cause myocardial ischemia, myocardial infarction, ventricular arrhythmias, or severe hypertension. Availability. 25 mg, 50 mg, 100 mg tablets; 5 mg/10 mL vial. Actions. In therapeutic doses, atenolol selectively blocks beta 1-adrenergic receptors located chiefly in cardiac muscle. Atenolol works great for me. One cardiologist insisted I switch to bisporolol. I did, and it was terrible. Had to go to the hospital because my heart rate wouldn't come down. Detailed drug Information for atenolol. Includes common brand names, drug descriptions, warnings, side effects and dosing information. Noten (atenolol) is used to manage hypertension, prevent angina, treat arrhythmia and heart attacks, and reduce the risk of heart attack complications. Atenolol (free base) has a molecular weight of 266. It is a relatively polar hydrophilic compound with a water solubility of 26.5 mg/mL at 37°C and a log partition coefficient (octanol/water) of 0.23.