twenty patients with hypertension uncontrolled by existing therapy with two or three antihypertensive agents ( a beta-blocker plus a thiazide diuretic in 10 and with the addition of hydralazine or prazosin in the other 10 ) were studied to assess the effects of additional long-term administration of nifedipine .
C0020538
hypertension
C0028066
nifedipine