Candesartan ingredient medicines are used for treatment of hypertension; it belongs to a class of drugs called angiotensin receptor blockers (ARBs). Generic candesartan tablet works by relaxing blood vessels so blood can flow more easily.  This medication can also help protect the kidneys from damage due to diabetes. Avoid this medication if you are pregnant or breast-feeding. Candesartan has to be taken daily, as its treatment is a long-term as advised by your physician.