Tenomac 25 mg Tablet helps in the treatment of high blood pressure (hypertension), irregular heartbeats (arrhythmias), and chest pain with painful tightness in the chest (angina pectoris). It protects the heart in the early treatment after a heart attack (myocardial infarction). It contains Atenolol, which helps relax our blood vessels by blocking the action of certain natural substances in your body. Thus, it helps lower raised blood pressure and reduce the risk of stroke, heart attack, other heart problems, or kidney problems in the future. Sometimes, you may experience side effects such as headaches, cold hands/feet, diarrhoea, nausea, tired, aching muscles, depressed mood, and dizziness.