4F 4PP (oxalate)

4F 4PP (oxalate) is a selective 5-HT2A antagonist with almost as high affinity (Ki= 5.3 nM) as ketanserin but with a much lower affinity for 5-HT2C sites (Ki= 620 nM)[1][2][3][4].

[1]Aira Z, et al. Selective impairment of spinal mu-opioid receptor mechanism by plasticity of serotonergic facilitation mediated by 5-HT2A and 5-HT2B receptors. Pain. 2012;153(7):1418-1425.|[2]Lee SH, et al. Peripheral serotonin receptor 2B and transient receptor potential channel 4 mediate pruritus to serotonergic antidepressants in mice. J Allergy Clin Immunol. 2018;142(4):1349-1352.e16.|[3] Rodríguez-Muñoz M, et al. Fenfluramine diminishes NMDA receptor-mediated seizures via its mixed activity at serotonin 5HT2A and type 1 sigma receptors. Oncotarget. 2018;9(34):23373-23389. Published 2018 May 4.|[4]Gerhold KJ, et al. Pronociceptive and Antinociceptive Effects of Buprenorphine in the Spinal Cord Dorsal Horn Cover a Dose Range of Four Orders of Magnitude. J Neurosci. 2015;35(26):9580-9594.