Sertraline has potent and selective inhibitory action on CNS neuronal reuptake of 5-HT resulting in increased 5-HT concentrations at the synaptic clefts, leading to facilitation of its sustained activity at the postsynaptic receptor sites. It ultimately results in an improvement of depression. Reduction of Serotonin turnover in brain by Sertraline is also another contributing fact implicated in its action. Its prolonged elimination half-life offers a benefit of once daily administration.