Trazodone

Trazodone (CAS No.: 19794-93-5) is a triazolopyridine-derived small molecule classified as a serotonin receptor antagonist and reuptake inhibitor, widely utilized as a pharmacological tool in neuropharmacology and central nervous system research. It exhibits high affinity for serotonin 5-HT2A and 5-HT2C receptors, functioning primarily as an antagonist, and additionally interacts with α1- and α2-adrenergic receptors as well as histamine H1 receptors, while displaying minimal anticholinergic activity. Through modulation of serotonergic signaling pathways, trazodone is commonly employed to investigate receptor-mediated neurotransmission, synaptic plasticity, and the regulatory mechanisms underlying mood- and behavior-associated neural circuits. In vitro studies demonstrate activity at 5-HT receptor subtypes typically in the low micromolar range, supporting its utility in receptor binding and functional assays. In cellular and animal models, it is used to assess effects on neurotransmitter release, intracellular signaling cascades, and behavioral phenotypes relevant to affective and sleep-related processes. Experimental concentrations or dosing regimens vary depending on specific assay conditions and research objectives, making trazodone a versatile probe compound for studying serotonergic system dynamics and receptor pharmacology in drug discovery and mechanistic investigations.