Pentifin and dopamine D1 receptor antagonist SCH-23390 possess similar pharmacological properties. In the present work we studied in vitro effects of Pentifin on dopamine receptors. Experiments on rat ductus deferents showed that Pentifin acts as a weak ligand of dopamine receptors. Our results indicate that the antihaloperidol effect of Pentifin is not related to the blockade of dopamine receptors.
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