Ranox 40 H Tablet is a medicine used to treat hypertension (high blood pressure). It is a combination of two medicines that helps to control blood pressure when a single medication is not effective. Ranox 40 H Tablet should be taken on empty stomach preferably in the morning to avoid frequent urination at night. 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.Weakness and slow heart rate are some common side effects of this medicine. Consult your doctor If any of these bother you, or get worse, or do not go away.  Drink plenty of fluids while taking medicine to overcome muscle weakness, dry mouth, and extreme thirst. Dizziness or headache may occur due to low blood pressure, hence rise slowly from sitting position or avoid driving.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. You should have your blood pressure, kidney function, level of electrolytes, and blood sugar level checked regularly to make sure that this medicine is working properly.