Tianeptine is an atypical antidepressant which is used mainly in the treatment of major depressive disorder, although it may also be used to treat anxiety, asthma, and irritable bowel syndrome. In terms of chemical structure, it is technically a tricyclic antidepressant (TCA), but it has a very different drug profile than other TCAs, and is not usually grouped with them.
Tianeptine, a selective enhancer of serotonin uptake in rat brain. 
Antidepressant and anxiolytic activities of tianeptine: an overview of clinical trials. 
Neuroprotective properties of tianeptine: interactions with cytokines. 
Neurobiological and clinical effects of the antidepressant tianeptine. 
The atypical antidepressant and neurorestorative agent tianeptine is a μ-opioid receptor agonist.