Final answer:
Hydralazine is a vasodilator used to treat hypertension, with fast acetylators having shorter half-lives than slow acetylators. It decreases blood pressure by increasing the filtration rate and decreasing sodium reabsorption, but is not primarily a diuretic.
Step-by-step explanation:
The subject here is hydralazine, a medication used to treat hypertension. The correct statement regarding hydralazine is that fast acetylators have shorter half-lives than slow acetylators. Hydralazine works as a vasodilator, not through the sympathetic nervous system mechanism (SNS), opposing the suggestion in option B. It decreases blood pressure by vasodilation and by increasing the glomerular filtration rate, which leads to decreased sodium reabsorption in the kidneys. It does not primarily act as a diuretic, but because of its vasodilation effect, it can indirectly decrease sodium reabsorption. The excretion or clearance rate mentioned in option E would need to be specifically backed by clinical data for hydralazine, which is not provided here.