Tags: Drug.
Hydrochlorothiazide abbreviated HCTZ HCT or HZT is a diuretic drug of the thiazide class that acts by inhibiting the kidneys’ ability to retain water. This reduces the volume of the blood decreasing blood return to the heart and thus cardiac output and by other mechanisms is believed to lower peripheral vascular resistance.It is on the World Health Organization’s List of Essential Medicines a list of the most important medications needed in a basic health system.