title: Pressor response to beta-blocking drugs.
abstract: A patient with essential hypertension had a prolonged period of uncontrollable high blood pressure during therapy with the nonspecific beta-blocker nadolol. A subsequent challenge with the beta1-blocker atenolol caused a pressor response associated with diminished catecholamine release, impaired catecholamine clearance, loss of baroreflex response, and bradycardia. Beta-blocking drugs can lead to hypertension by causing fluid retention, reversal of catecholamine vasodilatation, or a direct pressor effect.
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000494:pharmacology*; D001262:Atenolol / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects*; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy; D007545:Isoproterenol; D008875:Middle Aged; D009529:Nicardipine; D009543:Nifedipine / Q000031:analogs & derivatives / Q000494:pharmacology; D009638:Norepinephrine / Q000097:blood; D011311:Pressoreceptors / Q000187:drug effects
chemical_list: D000319:Adrenergic beta-Antagonists; D001262:Atenolol; D009529:Nicardipine; D009543:Nifedipine; D007545:Isoproterenol; D009638:Norepinephrine