2-Chloroamphetamine
2-Chloroamphetamine (2-CA), also known as ortho-chloroamphetamine (OCA), is a monoamine releasing agent (MRA) of the amphetamine family related to 2-fluoroamphetamine (2-FA).[1] PharmacologyPharmacodynamicsIt has been found to induce the release of norepinephrine and dopamine in rat brain synaptosomes with EC50 values of 19.1 and 62.4 nM, respectively, whereas serotonin was not reported.[1] It has been found to also induce the release of serotonin in mouse brain slices to some degree,[2] whereas it did not induce the release of serotonin in the brain in rats in vivo.[3] In contrast to amphetamine and para-chloroamphetamine (PCA; 4-chloroamphetamine), 2-CA does not appear to produce hyperlocomotion in mice, and instead has been found to decrease locomotor activity.[4] However, it did potentiate the effects of levodopa similarly to amphetamine and PCA.[4] On the other hand, like amphetamine but in contrast to PCA and 4-methylamphetamine (4-MA), 2-CA did not potentiate the effects of 5-hydroxytryptophan (5-HTP).[4] Unlike PCA, 2-CA did not produce the head-twitch response, a behavioral proxy of psychedelic-like effects, in mice.[4] In contrast to PCA, but similarly to amphetamine, 2-CA does not appear to produce serotonergic neurotoxicity in rats or guinea pigs.[5][6][3][7] While this could be attributed to rapid metabolism in the case of 3-chloroamphetamine (3-CA), 2-CA continued to lack serotonergic neurotoxicity even when its metabolism was inhibited by desipramine.[6] References
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