A dangerous substance dubbed “gas station heroin” continues to alarm medical professionals, with more states making moves to restrict or ban tianeptine . Fourteen states have officially classified the tricyclic antidepressant as a Schedule I controlled substance. Connecticut is the latest state to crack down , officially banning the sale and use of the substance starting on Wednesday. Tianeptine, which can produce euphoria in higher doses, can be more potent than morphine and addictive opioids,