"• From 2020 to 2024, alcohol remained the most common primary substance6 used among admissions.
"• Heroin-related admissions steadily declined over the 5-year period, dropping from the second most reported primary substance used among admissions to the fourth by 2023.
"• During that same period, other opiates and synthetics rose from fifth to third among primary substances reported at admission.
"• Methamphetamine use also increased, surpassing heroin to become the second most common primary substance since 2023.
"• Marijuana/Hashish gradually represented a smaller percentage of admissions over the 5-year period, while cocaine use steadily increased."
Substance Abuse and Mental Health Services Administration: Treatment Episode Data Set (TEDS) 2024: Admissions to and Discharges from Substance Use Treatment Services Reported by Single State Agencies. Publication No. PEP26-07-013, Substance Abuse and Mental Health Services Administration, 2026.