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. 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. A serotonergic or serotonergic agent is any chemical that modifies the effects of serotonin in the body. Some different types of serotonergics drugs include the following: