Summary
The effects of single or repeated doses of antidepressant drugs (imipramine, amitriptyline, citalopram, mianserin) on rat locomotor hyperactivity induced by quinpirole, a dopamine D-2 receptor agonist, was investigated. Single doses of antidepressants do not change the effect of quinpirole, but enhance it when they are administered repeatedly. This enhancement is inhibited by (±)-sulpiride, a dopamine D-2 receptor antagonist. The results obtained indicate that the enhancement of dopaminergically-stimulated hyperactivity induced by repeated doses of antidepressants is mediated by dopamine D-2 receptors.
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Maj, J., Rogóż, Z., Skuza, G. et al. Antidepressants given repeatedly increase the behavioural effect of dopamine D-2 agonist. J. Neural Transmission 78, 1–8 (1989). https://doi.org/10.1007/BF01247108
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DOI: https://doi.org/10.1007/BF01247108