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Abstract
The action of increasing piracetam concentration on the digoxin up-take by various rabbit tissues was investigated in vitro. 125J-digoxin was used and radioactivity was counted in a gamma scintillation counter. Piracetam 100μg/ml has a small increasing action on digoxin up-take by parenchymatous rabbit tissues. This action may be due to the beneficial effect of the substance on tissue microcirculation and cell metabolism. This action is equilibrated or reversed by piracetam 200μg/ml and 400μg/ml. It is suggested that piracetam displays digoxin from its binding-sites but these concentrations are above those ones used for clinical purposes.
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