This medicine is a beta-blocker which contains atenolol lowers blood pressure and treats hypertension, irregular heart beat and angina and prevents heart attack. Atenolol tabs can also be taken in combination with other medicines to treat high blood pressure and angina. Atenolol ingredient tablets slow down heart by blocking tiny areas which slows your heart beats with less force. Â Â Â Â Â Â Â Â Keep all medicines out of the reach of children. Â Â Â Â Â Â Â Â Store in a cool, dry place, away from direct heat.