Cortel M 25 Tablet ER is a medicine used for treating high blood pressure. By lowering the blood pressure, it helps in preventing future heart attack and stroke. Early treatment with this medicine also improves chances of survival in patients of heart attack. It is advised to take Cortel M 25 Tablet ER with food at a fixed time each day to maintain consistent levels of medicine in the blood. Keep taking it for as long as advised by your doctor. Even if you feel well, do not stop this medicine on your own because high blood pressure often has no symptoms. If you stop taking it, your condition may get worse. Keeping active with regular exercise, reducing your weight and eating a healthy diet will also help control your blood pressure. Follow your doctor’s advice while taking this medicine. Some common side effects of this medicine include headache, weakness, dizziness, decreased blood pressure, and increased potassium level in blood. It is advised to avoid potassium rich food and supplements while taking this medicine. It may cause dizziness, avoid driving or rise slowly from the sitting position. You may be asked for regular monitoring of blood pressure, blood sugar level, kidney functioning, urea, or electrolytes level during the treatment. Before taking it, let your doctor know if you have any liver or kidney problems. Pregnant or breastfeeding women should also consult their doctor for advice before taking this medicine. You also need to tell your doctor what other medicines you are taking especially those used to treat high blood pressure or heart conditions.