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  • Title: Fluoxetine and two other serotonin uptake inhibitors without affinity for neuronal receptors.
    Author: Wong DT, Bymaster FP, Reid LR, Threlkeld PG.
    Journal: Biochem Pharmacol; 1983 Apr 01; 32(7):1287-93. PubMed ID: 6303355.
    Abstract:
    Fluoxetine and nine other antidepressant drugs which interact with brain receptors for neurotransmitters were studied in vitro using radioligand-binding techniques and transmitter-coupled adenylate cyclase assays. Tricyclic antidepressant drugs (desipramine, imipramine, clomipramine, amitriptyline and doxepin) had marked affinity for alpha-adrenergic, muscarinic cholinergic and histaminergic H1 receptors, and lesser affinity for serotonin and dopamine receptors. Mianserin was relatively similar to some of the tricyclic compounds, whereas trazodone had less affinity for most receptors except serotonin and alpha-adrenergic receptors. Fluoxetine had little affinity for any of these receptors, and the same was true for zimelidine and fluvoxamine, two other selective inhibitors of serotonin uptake. None of the compounds showed much affinity for beta-adrenergic receptors, opiate receptors, gamma-aminobutyric acid receptors, or benzodiazepine receptors. The present findings with fluoxetine are consistent with the virtual absence of anticholinergic or other side effects often observed with tricyclic antidepressant drugs in animal models or during the treatment of depressed patients.
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