Hydralazine is a directly acting vasodilator, but is not
used alone as an antihypertensive because:
A. By itself, it is a low efficacy antihypertensive
B. Effective doses cause marked postural hypotension
C. Tolerance to the antihypertensive action develops early due to counterregulatory mechanisms
D. It primarily reduces systolic blood pressure
with little effect on diastolic blood pressure
used alone as an antihypertensive because:
A. By itself, it is a low efficacy antihypertensive
B. Effective doses cause marked postural hypotension
C. Tolerance to the antihypertensive action develops early due to counterregulatory mechanisms
D. It primarily reduces systolic blood pressure
with little effect on diastolic blood pressure