Co-Diovan 160mg/12.5mg is a prescription medication that combines valsartan (160mg) and hydrochlorothiazide (12.5mg) in film-coated tablets. This combination medication is used to treat high blood pressure (hypertension). Each pack contains 28 tablets. Co-Diovan contains two active ingredients that work together to lower blood pressure: valsartan, which belongs to a class of drugs called angiotensin II receptor blockers (ARBs), and hydrochlorothiazide, which is a diuretic (water pill). The medication should be taken exactly as prescribed by your healthcare provider. Common side effects may include dizziness, fatigue, and changes in electrolyte levels. This medication requires a prescription and regular monitoring by a healthcare professional.