Telkonol M 40mg/25mg Tablet is a medication used to treat high blood pressure, preventing future heart attacks and strokes. It is recommended to take it with food at a fixed time each day, and to maintain consistent levels. It is important to follow doctor's advice and maintain regular exercise, weight reduction, and a healthy diet. Common side effects include headache, weakness, dizziness, decreased blood pressure, increased potassium levels, orthostatic hypotension, breathlessness, nausea, vomiting, abdominal pain, and fatigue. Regular monitoring of blood pressure, blood sugar, kidney functioning, and electrolytes is advised.