Serotonergic (/ˌsɛrətəˈnɜːrdʒɪk, ˌsɪər-/) or serotoninergic (/ˌsɪərətoʊnɪˈnɜːrdʒɪk/) means "pertaining to or affecting serotonin". Serotonin is a neurotransmitter. A synapse is serotonergic if it uses serotonin as its neurotransmitter. A serotonergic neuron produces serotonin. A substance is serotonergic if it produces its effects via interactions with the serotonin system, such as by stimulating or blocking neurotransmission. * Serotonin receptor agonists and antagonists * Serotonin reuptake inhibitors * Serotonin releasing agents