Home/Resources/How long does nicotine stay in your system?

Substance guides

How long does nicotine stay in your system?

Published January 11, 2026 · 7 min read · Updated April 2026
Reviewed for accuracy by licensed clinical professionals.

Nicotine itself has a short half-life of 1-2 hours, but its metabolite cotinine is what most tests detect, with a much longer detection window.

Detection by test type

Blood: cotinine for 1-10 days. Urine: cotinine for 3-4 days (occasional) to 15-20 days (heavy smoker). Saliva: 1-4 days. Hair: up to 90 days.

Why testing matters

Life and health insurance companies test cotinine to set tobacco user rates. Smokers pay 15-50% higher premiums. Some employers test as a condition of employment. Surgical programs may require clearance before elective procedures.

Clearing for insurance tests

Most insurance tests use a 200 ng/mL cutoff. Light smokers may clear in 5-7 days. Heavy smokers need 2-3 weeks. All nicotine products including patches and gum produce cotinine and will trigger a positive test.

Authoritative sources

This article references guidelines from: NIDA · SAMHSA · CDC

Frequently asked questions

How long does nicotine stay in urine?
Cotinine is detectable for 3-4 days after occasional use and 15-20 days after heavy chronic smoking.
Do nicotine patches show on a cotinine test?
Yes. All nicotine products produce cotinine. You must stop all nicotine to clear the test.
How long before an insurance test should I quit?
Light smokers: 5-7 days. Heavy smokers: 2-3 weeks. Stop all nicotine products including patches and gum.

Disclaimer: Informational only. Not medical advice. SAMHSA: 1-800-662-4357.

Related articles

How long does Valium stay in your system?How long does kratom stay in your system?How long does hydrocodone stay in your system?How long does Adderall stay in your system?