Metolaz 5mg Tablet is a type of diuretic (water pill) medicine. This medicine reduces excess fluid levels in the body and is used to treat edema (fluid overload) associated with heart, liver, kidney, or lung disease. It is also used in treatment of hypertension (high blood pressure). Metolaz 5mg 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. Common side effects of this medicine include headache, nausea, and dizziness. Consult your doctor if these side effects bother you. Before taking this medicine, it is better to let your doctor know if you are suffering from any kidney or liver disease. Also, pregnant women and breastfeeding mothers should consult a doctor before taking it. You must inform the 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.