Aquazide 12.5 Tablet is a diuretic (water pill) medicine used to treat hypertension (high blood pressure). This medicine reduces excess fluid levels in the body and treats edema (fluid overload) associated with heart, liver, kidney, or lung disease. Aquazide 12.5 Tablet makes you lose excess water through urine. It may be used alone or in combination with other medicines. This medicine should be taken only during day time to avoid frequent urination at night. You must take this medicine in the dose and duration as advised by the doctor and never stop it abruptly without consulting the doctor. Most people with high blood pressure do not feel ill, but if you stop taking this medicine, your condition could get worse. This may lead to your blood pressure rising up again and increase your risk of heart disease and stroke. It is important to have your blood pressure checked regularly. This medicine is only one part of a treatment program which should also include a healthy diet, regular exercise, smoking cessation, moderation of alcohol intake and weight reduction. You can eat normally while taking this medicine, but try to reduce your salt intake. Common side effects of this medicine include headache, nausea, dizziness, and weakness. Consult your doctor if these side effects bother you. Before taking this medicine, its better to let your doctor know if you are suffering from any kidney or liver disease. Also, pregnant women and breastfeeding mothers should consult doctor before taking it. You must inform doctor about all the other medicines that you are taking apart from this medicine. Regular monitoring of kidney function and electrolytes is important while using this medicine.