Tianeptine sodium salt is a tricyclic antidepressant. Its antidepressant mechanism is different from traditional tricyclic antidepressants. It can increase the reuptake of 5-HT in the synaptic space and may increase 5-HT nerves. The effect of meta-conduction.The antidepressant effect is similar to tricyclics, but the tolerability is better than tricyclics. In animal experiments, it can increase the spontaneous activity of pyramidal cells in the hippocampus and accelerate the recovery of their functions after being inhibited; it can increase the reabsorption of serotonin by neurons in the cerebral cortex and hippocampus. Tianeptin sodium is absorbed quickly and completely in the digestive tract. The distribution is rapid, and the PPB is as high as 94%. It is completely metabolized in the liver through β-oxidation and N-demethylation, and the final clearance T1/2 is short, which is 2.5 hours. A very small amount of the original drug (8%) is excreted from the kidneys, mainly due to the excretion of its metabolites in the urine. . In patients with renal insufficiency, the clearance of T1/2 was extended by 1 hour.