SSRIs are a class of antidepressant medicine. They work by increasing the level of serotonin in the brain, which is believed to help to relieve the symptoms of depression. Close Window

Selective serotonin reuptake inhibitors. Drugs belonging to this class are antidepressant agents that selectively inhibit the absorption of serotonin at certain nerve membranes (e.g., presynaptic neuronal membranes). These drugs increase the concentration of serotonin within the central nervous system and enhance serotonin's neurotransmission activities.

See "selective serotonin reuptake inhibitors."