Fentanyl, Methamphetamine and Polysubstance Use Differentially Affect Locomotor Sensitisation and Social Behaviour in Rats: Psychedelic Treatment Reverses Social Deficits.
Addiction biology March 1, 2026 Leah M Salinsky, Kyra C Diaz, Joshua L Fox et al. 1 citation
Polysubstance use of opioids and stimulants is common, but most research examines each drug alone. In rats, the effects of fentanyl and methamphetamine—alone or combined—on movement sensitization and social behavior depended on drug class, drug history, and sex. After withdrawal, social deficits emerged. A single dose of the psychedelic DOI reversed those social deficits and even boosted social interaction in females. The findings suggest psychedelics might help treat social impairments linked to withdrawal from combined opioid and stimulant use.