Hypertension is define as;  persistant and sustained high blood pressure that has a damaging effect on heart, kidney and brain etc. there are two type of hypertension.primary hypertension, it is most common and there is no specific underlying causes. secondary hypertension, It is due to renal, vascular or endocrine disorder etc. Classification of anti-hypertension drugs: Angiotension converting enzymes ACE inhibitors: captopril, enalapril, lisinopril, perindopril, ramipril, benazepril, fosinopril. Angiotension II receptor blockers: Losartan, candisartan, irbesartan, valsartan, telmisartan, olmesartan. Direct renin-inhibitors: Aliskiren. …