to evaluate the role of the sympathetic nervous system in essential hypertension and the influence of clonidine , 28 male subjects with mild to moderate hypertension were either treated with low-dose clonidine ( n = 14 , mean age : 42.4 +/- 2.1 years ) or were randomized to a nontreated control group ( n = 14 , mean age : 40.2 +/- 2.4 years ) .
C0020538
hypertension
C0009014
clonidine