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  • Title: Influence of acetylsalicylic acid on acute circulatory effects of the beta-blocking agents pindolol and propranolol in humans.
    Author: Sziegoleit W, Rausch J, Polák G, György M, Dekov E, Békés M.
    Journal: Int J Clin Pharmacol Ther Toxicol; 1982 Sep; 20(9):423-30. PubMed ID: 7141761.
    Abstract:
    In ten hospitalized, hypertensive male patients (WHO stage I or II) an acetylsalicylic acid (ASA) pretreatment (p.o. 5.0 g/24 h) prevented the acute blood pressure (BP) lowering effect of pindolol (1 mg i.v.) as compared with a placebo pretreatment. Similarly in six other hospitalized male patients (four normotensive, two slightly hypertensive) a single dose of ASA (1.0 or 1.5 g orally), which alone tended to raise the BP, reduced the decrease in systolic BP and led to an increase in diastolic BP following propranolol (5 mg i.v.). The ASA pretreatment did not affect the decrease in heart rate and cardiac contractility (measured by systolic time intervals) after the application of pindolol and propranolol, respectively. In conformity with data in the literature, the results suggest a possible connection between endogenous prostaglandins and the hypotensive, but not negative chronotropic and inotropic activity of the beta-blocking agents investigated.
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