Rimcazole is an antagonist[1] of the sigma receptor[2] as well as a dopamine reuptake inhibitor.[3] Sigma receptors are thought to be involved in the drug psychosis that can be induced by some drugs such as phencyclidine and cocaine, and rimcazole was originally researched as a potential antipsychotic with a different mechanism of action to traditional antipsychotic drugs. Trials proved inconclusive and rimcazole was not pursued for this application, but other sigma antagonists continue to be researched for a variety of potential applications.[4] Rimcazole has been shown to reduce the effects of cocaine,[5] and analogues of rimcazole have been shown to be highly effective at blocking the convulsions caused by cocaine overdose in animal models.[6]
^Eaton MJ, Lookingland KJ, Moore KE (September 1996). "The sigma ligand rimcazole activates noradrenergic neurons projecting to the paraventricular nucleus and increases corticosterone secretion in rats". Brain Research. 733 (2): 162–166. doi:10.1016/0006-8993(96)00290-9. PMID8891298. S2CID42885767.
^Husbands SM, Izenwasser S, Loeloff RJ, Katz JL, Bowen WD, Vilner BJ, Newman AH (December 1997). "Isothiocyanate derivatives of 9-[3-(cis-3,5-dimethyl-1-piperazinyl)propyl]carbazole (rimcazole): irreversible ligands for the dopamine transporter". Journal of Medicinal Chemistry. 40 (26): 4340–4346. doi:10.1021/jm9705519. PMID9435903.
^Katz JL, Libby TA, Kopajtic T, Husbands SM, Newman AH (May 2003). "Behavioral effects of rimcazole analogues alone and in combination with cocaine". European Journal of Pharmacology. 468 (2): 109–119. doi:10.1016/s0014-2999(03)01638-8. PMID12742518.
^Matsumoto RR, Hewett KL, Pouw B, Bowen WD, Husbands SM, Cao JJ, Newman AH (December 2001). "Rimcazole analogs attenuate the convulsive effects of cocaine: correlation with binding to sigma receptors rather than dopamine transporters". Neuropharmacology. 41 (7): 878–886. doi:10.1016/s0028-3908(01)00116-2. PMID11684152. S2CID44328858.