to determine if a new dihydropyridine derivative , nitrendipine , is more effective in the elderly ( older than 60 years ) than in younger hypertensive subjects ( younger than 60 years ) , nitrendipine was administered in a multicentered study to 21 elderly and 33 younger subjects with essential hypertension .
C0012315
dihydropyridine
C0028127
nitrendipine