Why were G.G.'s hydrochlorothiazide and metoprolol discontinued and what type of antihypertensive is prazosin? Why was prazosin prescribed instead of other anti-hypertensive agents? a) Because hydrochlorothiazide and metoprolol are not effective for hypertension. b) Prazosin is a beta-blocker and was prescribed for its vasodilatory effects. c) Prazosin is an alpha-blocker and was prescribed due to its effectiveness in treating anxiety. d) Because hydrochlorothiazide and metoprolol can cause allergic reactions.