Does tolerance affect overdose risk?
- By Robert Mauer
- Reviewed by: Dr. Janaka Hanvey, PhD
Yes, tolerance significantly affects overdose risk. Low or reduced tolerance increases vulnerability, meaning smaller amounts can produce dangerous effects.
A particularly high-risk situation occurs after abstinence, when tolerance decreases. Returning to a previously tolerated dose can lead to overdose.
Tolerance can also create a false sense of safety. It may reduce perceived effects but does not eliminate risk, and it can contribute to higher dosing patterns that increase the likelihood of overdose.
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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.