A 2026 Australian interview study involving 27 adults with methamphetamine use problems found that 21 participants, or 77.8%, had never previously sought treatment for methamphetamine use. Research Highlights Most had never sought treatment: Peart et al. interviewed 27 adults and found that 77.8% had not previously sought methamphetamine treatment before entering the parent trial.1 3 …
A 2026 eLife study recorded 3,881 lateral orbitofrontal cortex units in rats and found that prior cocaine use made the OFC over-distinguish task positions that controls treated as functionally equivalent. The headline result was not gross task failure: cocaine-experienced rats still performed the odor task, but their OFC ensembles showed higher S1-vs.-S2 decoding than sucrose …
Whether alcohol, cocaine, nicotine, and cannabis damage the same brain regions or different brain regions has been hard to settle in the addiction-imaging literature. A 2026 ENIGMA Addiction analysis by Georgiadis et al. — pooling 4,733 brains across 51 sites — now has an answer. Research Highlights Across 2,782 people with substance use disorder (SUD) …