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9 resultados
Effects of granisetron, a selective 5-HT3 receptor antagonist, on ouabain-induced emesis in ferrets.
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The antiemetic effect of granisetron, a selective 5-HT3 receptor antagonist, on ouabain-induced emesis was studied using ferrets. In order to clarify the relationship between ouabain-induced emesis and serotonin (5-HT), we examined its effects on 5-HT release from the isolated ileum. Afferent vagal
Cat assay for the emetic action of digitalis and related glycosides (digitoxin, digoxin, lanatoside C, ouabain and calactin).
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1. A titration assay with two end points is described for comparison of the emetic and lethal potencies of digitalis-like drugs.2. A drug was infused at constant rate to a conscious, unrestrained cat, through an indwelling venous cannula. At the moment of vomiting the cat was rapidly anaesthetized
Role of catecholamines in the central mechanism of emetic response induced by peruvoside and ouabain in cats.
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1 Peruvoside, (a glycoside obtained from the plant, Thevetia neriifolia Juss) and ouabain produce emesis in cats. Vomiting is not produced by these drugs in animals pretreated with catecholamine depleting drugs like reserpine, tetrabenazine or syrosingopine. Chloropromazine hydrochloride, mepyramine
The haemodynamic effects of intravenous prenalterol and ouabain in conscious dogs.
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Experiments were performed on 5 resting conscious dogs supplied with an electromagnetic flow probe on the ascending aorta and a chronic aortic catheter for pressure recording. The animals were used repeatedly in four different types of experiment involving i.v. administration of 1. saline
Involvement of a peripheral mechanism in the emesis induced by cardiac glycosides in Suncus murinus.
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The ability of three cardiac glycosides, ouabain, digitonin and digitoxin, to induce emesis and their mechanism(s) of action were investigated in Suncus murinus. The intraperitoneal injection of ouabain but not digitonin nor digitoxin caused vomiting in a dose-dependent manner. However, the
Digoxin: placental transfer, effects on the fetus, and therapeutic use in the newborn.
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Digoxin rapidly crosses the placenta and reaches equilibrium, with maternal and fetal sera having equal concentrations. Virtually nothing is known about the effects of transplacentally administered digoxin on the fetus. Toxicity has been reported in the fetus of a woman ingesting a huge overdose of
Clinical implications of differences in pharmacodynamic action of polar and nonpolar cardiac glycosides.
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The principal effects of cardiac glycosides probably can be classified as parasympathomimetic or sympathomimetic. Data from animals and from man suggest that polar cardiac glycosides, such as ouabain and digoxin, possess greater parasympathomimetic (vagal) cardiac effect for a given amount of
The emetic effect of B-HT 920 and apomorphine in the dog: antagonism by haloperidol.
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Recent investigations have suggested that the alpha 2-adrenoreceptor agonist B-HT 920 is also a dopamine (DA) agonist with a selectivity for presynaptic receptors. In the present study, the emetic effect of B-HT 920 was investigated. Intravenous injections of B-HT 920 (0.32-10.0 micrograms/kg) and a
Antiarrhythmic, electrophysiologic and hemodynamic effects of lorcainide.
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Lorcainide hydrochloride or N-(4-chlorophenyl)-N-[1-(1-methyl-ethyl)-4-piperidinyl]benzeneacetamide mono-hydrochloride (R 15889) is a new anti-arrhythmic drug. Studies in dogs show that lorcainide is effective against post-infarction and ouabain-induced ventricular arrhythmias, and abolishes
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