Diostar-plus is a prescription medication containing a combination of Valsartan (80mg) and Hydrochlorothiazide (12.5mg). This medication comes in a pack of 30 tablets and is used for treating high blood pressure and other cardiovascular conditions. This medication requires a valid prescription from a licensed healthcare provider. The combination of Valsartan (an angiotensin II receptor blocker) and Hydrochlorothiazide (a diuretic) works together to help lower blood pressure. Always take this medication exactly as prescribed by your doctor.