Tipepidine hydrochloride reversibly inhibits dopamine (DA) D2 receptor-mediated GIRK currents (IDA(GIRK)) with an IC50 of 7.0 μM. Tipepidine hydrochloride subsequently activates VTA dopamine neuron[1]. Tipepidine hydrochloride, a non-narcotic antitussive, exerts an antidepressant-like effect[2].
Tipepidine (i.p.; 10-40 mg/kg; 0.5-23 hours) significantly decreases the immobility time in the forced swimming test in ACTH-treated rats. Tipepidine (i.p.; 40 mg/kg) increases the extracellular dopamine level of the nucleus accumbens (NAc) in ACTH-treated rats[2]. Animal Model: Male Wistar rats weighting 150-240 g (5-7 weeks old) [2]
[1]. Hamasaki R, et al. Tipepidine activates VTA dopamine neuron via inhibiting dopamine D? receptor-mediated inward rectifying K? current. Neuroscience. 2013 Nov 12;252:24-34. [2]. Kawaura K, et al. Tipepidine, a non-narcotic antitussive, exerts an antidepressant-like effect in the forced swimming test in adrenocorticotropic hormone-treated rats. Behav Brain Res. 2016 Apr 1;302:269-78.