Inhibition of Platelet Aggregation in Man by Indobufen (K 3920)

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Abstract
A complete crossover trial was undertaken in six healthy volunteers to gain information on dose-effect responses to indobufen by assessing the intensity and duration of the effect of 3 single oral doses of the drug on platelet aggregation induced by threshold concentration of ADP and by 3 added doses of collagen. The results of the study confirm that the activity is dose-related and is reversible since 24 hours after administration it has practically disappeared. The effect of the same dose of indobufen differed significantly according to the amount of collagen added to plasma, whereas increasing doses of indobufen provoked a significantly more marked effect when the amount of inducer employed was the same.