Tianeptine is trending under an unflattering nickname — 'gas station heroin' — in Reddit recovery threads and news coverage, driven by its easy over-the-counter availability in convenience stores, vape shops and online, where it is marketed as a supplement for mood, focus and energy. In May 2025 the FDA issued a fresh consumer warning advising people not to buy or use any tianeptine product, calling it a dangerous and growing health trend.
The pharmacology is the reason for concern. Although tianeptine is an approved antidepressant in some countries at low doses (around 12.5 mg three times daily), it acts as a full agonist at the mu-opioid receptor. At the high doses seen in recreational use — U.S. case reports document intakes ranging from 50 mg up to roughly 10,000 mg per day — it produces opioid-like effects, dependence, and an opioid-type withdrawal syndrome of agitation, nausea, anxiety, diarrhea and chills. Reported acute adverse events include respiratory depression, tachycardia, coma and death.
Exposure data underline the trend: U.S. poison-center tianeptine cases rose sharply over the past decade, from single-digit annual reports in 2014 to several hundred by 2023. Tianeptine is not FDA-approved for any use in the United States, is not a lawful dietary ingredient, and — as of the 2025 warning — is not federally scheduled, though several states have banned it and federal legislation has been repeatedly proposed.
The reality behind the marketing: tianeptine is sold as a benign supplement but behaves as an opioid at the doses users escalate to. The gap between the label and the pharmacology is precisely where the dependence and overdose risk sits.