Tianeptine is an atypical antidepressant prescribed to treat major depressive disorder and anxiety.
While it is structurally similar to tricyclic antidepressants (TCAs), its pharmacology is unique because it acts as a mu-opioid receptor agonist and modulates the glutamatergic system.
In the United States, tianeptine is not FDA-approved for any medical use.
It is frequently sold as an unregulated “dietary supplement” or “nootropic” under brand names like ZaZa, Tianna, and Neptune’s Fix.
Gas Station Heroin- Due to its opioid-like effects at high doses, it is colloquially known as “gas station heroin”.
Recreational users often take doses up to 100 times higher than therapeutic levels (e.g., 3,000 mg+ daily vs. the standard 37.5 mg), leading to rapid tolerance and dependence.
High doses or misuse can cause seizures, respiratory depression, coma, and death.
Stopping use can trigger intense withdrawal symptoms similar to opioid withdrawal, including agitation, nausea, tachycardia, and muscle pain.
While not federally controlled in the U.S. as of March 2026, many states—including Alabama, Florida, Georgia, Kentucky, Michigan, Ohio, Tennessee, and Virginia—have banned it or classified it as a Schedule I or II controlled substance.
The [U.S. Food and Drug Administration linked-serious-harm-overdoses-death urging consumers to avoid all products containing tianeptine.
In 2024 and 2025, several clusters of severe illness and deaths were linked to tianeptine products, some of which were found to be adulterated with synthetic cannabinoids or other harmful chemicals.