Pharmacodynamic profile of bisoprolol, a new beta 1-selective adrenoceptor antagonist.

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Leopold G, Ungethum W, Pabst J, Simane Z, Buhring KU, Wiemann H

Pharmacodynamic profile of bisoprolol, a new beta 1-selective adrenoceptor antagonist.

Br J Clin Pharmacol. 1986 Sep;22(3):293-300. doi: 10.1111/j.1365-2125.1986.tb02890.x.

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2876722 [ View in PubMed
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Abstract

The pharmacodynamic profile of bisoprolol, a new beta 1-selective adrenoceptor antagonist, was investigated in four independent studies including 36 healthy male volunteers. Using the model of exercise-induced tachycardia (ET) the beta-adrenoceptor blocking properties of bisoprolol (2.5-40 mg) were examined in comparison to metoprolol (50 and 100 mg), propranolol (40 and 80 mg) and atenolol (50 and 100 mg). The maximal reduction of ET was achieved between 1 and 4 h following single oral administration. The dose-response relationship using individual maximal reduction of ET showed, on a molar basis, that bisoprolol is about 5, 7 and 10 times more effective than propranolol, atenolol and metoprolol, respectively. In the model of insulin-induced hypoglycaemia bisoprolol behaved as a beta 1-selective adrenoceptor antagonist. There was a good correlation (r = 0.94) between the log bisoprolol concentration and the reduction in exercise-induced tachycardia. Bisoprolol is a potent new cardioselective beta-adrenoceptor antagonist with a competitive action at beta 1-adrenoceptors.

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