Pharmacology
Nefazodone acts primarily as a potent antagonist at the 5-HT2A receptors (Kd 26 nM). It also has moderate affinity for the α1-adrenergic receptor (Kd 48 nM) and 5-HT1A receptor (Kd 80 nM), and very low affinity for the α2-adrenergic receptor (Kd 640 nM) and D2 receptor (Kd 910 nM). It acts as an antagonist at all of these sites. Nefazodone has low affinity for the serotonin (200 nM), norepinephrine (360 nM), and dopamine (360 nM) transporters as well, and therefore acts as a weak serotonin-norepinephrine-dopamine reuptake inhibitor (SNDRI). It has negligible affinity for the H1 receptor (24,000 nM) or muscarinic acetylcholine receptors (11,000 nM), and accordingly lacks any antihistamine or anticholinergic side effects.
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