Which drugs carry highest overdose risk?
- By Robert Mauer
- Reviewed by: Dr. Janaka Hanvey, PhD
Drugs that suppress breathing or consciousness carry the highest overdose risk. Opioids are most strongly associated with fatal overdose, particularly when combined with other depressants such as alcohol or benzodiazepines.
Other substances can also pose serious risk. Stimulants can disrupt heart rhythm and body temperature, and synthetic drugs may have unpredictable potency.
Overdose risk depends not only on the drug itself, but also on dose, combinations, tolerance, and individual vulnerability.
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Sources
National Institute on Drug Abuse (NIDA) — Drugs, Brains, and Behavior: The Science of Addiction
Government scientific overview of drug use, addiction, brain changes, tolerance, dependence, and recovery.
National Institute on Drug Abuse (NIDA) — Commonly Used Drugs Charts
Comprehensive federal reference covering major drug categories, effects, overdose risks, and health consequences.
Substance Abuse and Mental Health Services Administration (SAMHSA) — Substance Use and Mental Health
Federal information about substance use, addiction, prevention, treatment, and behavioral health.
MedlinePlus — Drugs and Young People
Government medical resource discussing drug effects, misuse, addiction risks, and substance use education.
National Institute on Drug Abuse (NIDA) — Understanding Drug Use and Addiction DrugFacts
Clear explanation of why people use drugs, how addiction develops, and how substance use affects the brain and behavior.