title: [Changes in plasma renin activity induced by acute administration of nifedipine in hypertensive patients (author's transl)].
abstract: In the present study we assessed plasma renin activity (PRA) variations induced by Ca++ antagonist antihypertensive drug Nifedipine in 8 normoreninaemic or hyporeninaemic hypertensive patients. On two successive days three venous blood samples were sampled, two in clinostatic position and the last one 120 min later in orthostatic position; on the second day 20 mg of nifedipine were administered sublingually. Nifedipine increases significantly PRA after orthostatic position compared with starting conditions (p < 0.01) and compared with the values recorded without the drug at the same times (p < 0.01). Both systolic and diastolic blood pressure decreased 15 and 120 min after nifedipine administration while heart rate increased at the same times. Acute nifedipine administration augments PRA in hypertensive subjects; explanatory hypoteses are proposed.
mesh_terms: D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D008875:Middle Aged; D009543:Nifedipine / Q000494:pharmacology / Q000627:therapeutic use*; D011725:Pyridines / Q000627:therapeutic use*; D012083:Renin / Q000097:blood*
chemical_list: D011725:Pyridines; D012083:Renin; D009543:Nifedipine
vernacular_title: Modificazioni dell'attività reninica plasmatica indotte dalla somministrazione acute di nifedipina in pazienti ipertesi.