Despite being highly addictive, the opioid-like substance is not illegal in Pennsylvania, New Jersey and Delaware.

A western Pennsylvania woman has died after accidentally overdosing on tianeptine, also called gas station heroin.
The Action News investigative team warned about the drug's danger in 2024, when it popped up in Philadelphia.
RELATED: FDA warns consumers about dangers of 'gas station heroin' | Here are the facts
It's often sold in bottles, which can also be found in vape shops.
Despite being highly addictive, the opioid-like substance is not illegal in Pennsylvania, New Jersey and Delaware.
Tianeptine has been linked to death, respiratory depression and severe sedation when misused, according to the FDA.