title: [Effects of clonidine on various blood-coagulation parameters in hypertension].
abstract: The effect of oral clonidine on prothrombin time, partial thromboplastin time, blood fibrinogen, fibrinolytic activity and platelet count was investigated in 25 hypertensive and 7 normal subjects. High plasma fibrinogen levels were present in 80% of the hypertensive patients and prolonged lysis time in 28%; the means values were 487 +/- 135 mg % and 223 +/- 62 min., respectively. The other coagulation tests were normal. 0,300-0,450 mg/day clonidine per os for 15 days both decreased fibginogen levels (mean 406 +/- 149; p less than 0.05) and shortened lysis time (mean 153 +/- 78 min; p less than 0.005). No changes were noted in the normal subjects. The pathophysiological mechanism of these findings is discussed and their possible implications for the treatment of hypertension are emphasised.
mesh_terms: D001777:Blood Coagulation / Q000187:drug effects*; D001809:Blood Viscosity / Q000187:drug effects; D003000:Clonidine / Q000494:pharmacology* / Q000627:therapeutic use; D005342:Fibrinolysis / Q000187:drug effects; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000188:drug therapy; D010974:Platelet Aggregation / Q000187:drug effects
chemical_list: D003000:Clonidine
vernacular_title: Effetti della clonidina su alcuni parametri emocoagulativi negli ipertesi