Journal
ACS CHEMICAL NEUROSCIENCE
Volume 5, Issue 1, Pages 24-29Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cn400189s
Keywords
Dopamine; psychosis; SHT2A receptor; dopamine D2 receptor
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Ever since clozapine was first synthesized and tested, it showed the unique property of having antipsychotic action but no Parkinson-like motor side effects. The antipsychotic basis of clozapine is to transiently occupy dopamine D2 receptors in the human striatum, in contrast to haloperidol and chlorpromazine, which have a prolonged occupation of D2 receptors. The chemical structure of clozapine facilitates a relatively rapid dissociation from D2 receptors. After short-term occupation of D2 receptors, peak neural activity raises synaptic dopamine, which then displaces clozapine. While clozapine also occupies other types of receptors, they may not have a significant role in preventing parkinsonism. Clozapine's transient occupation of D2 receptors permits patients to move easily and comfortably.
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