Vascular actions of clonidine in man.
D001808:Blood Vessels / Q000187:drug effects*; D003000:Clonidine / Q000494:pharmacology*; D006801:Humans; D009638:Norepinephrine / Q000494:pharmacology; D014661:Vasoconstriction / Q000187:drug effects
D003000:Clonidine; D009638:Norepinephrine