Laboratory pipette dropping liquid into test tubes

Nicotine Detection Times: Blood, Urine, Saliva and Hair

Nicotine detection times depend mostly on the type of test. Nicotine clears quickly, but its breakdown product, cotinine, lasts longer and is what most tests look for. This guide summarises typical detection times for blood, urine, saliva and hair.

Key Takeaways

Nicotine itself is usually cleared within 1–3 days.
Cotinine stays in the body longer and is the usual test marker.
Detection windows vary by test: blood, urine, saliva or hair.
Frequency of use and metabolism change how long it can be detected.

How Nicotine Becomes Cotinine

Nicotine detection times depend on cotinine, the main product formed when the liver breaks nicotine down. Cotinine is more stable and lasts longer, so most clinical tests look for it.

Nicotine has a half-life of around 1–4 hours, while cotinine's is much longer. This is why exposure checks, such as insurance or workplace screening, usually measure cotinine. Learn more about what nicotine is.

Detection Times by Test Type

Test type	Nicotine	Cotinine
Blood	About 1–3 days	Up to about 10 days
Urine	About 2–4 days	Typically about 2–5 days, depending on use
Saliva	About 1–2 days	About 1–2 days
Hair	Up to about 90 days or more	Up to about 90 days or more

These are typical ranges. Individual results vary.

Do Different Products Show Up Differently?

Not in a meaningful way. Nicotine pouches release nicotine through the lining of the mouth with a slower peak than inhaled products, but the body still produces cotinine.

Cotinine tests show that nicotine exposure has happened; they cannot reliably tell which product it came from. See how nicotine pouches work.

What Affects Detection Times?

How often and how much you use: regular or heavier use extends detection times.
Metabolism: genetics and physiology change how quickly nicotine and cotinine are broken down.
Hydration and urine pH: can influence urine results.
Test sensitivity: different tests use different cut-off levels.

For a broader look, read how long nicotine stays in your body.

Conclusion

Nicotine detection times depend on the test: blood, urine and saliva usually show use for days, while hair can show it for months. Most tests measure cotinine rather than nicotine. Frequency of use and metabolism change the results.

FAQs Nicotine Detection Times

Does nicotine show up on a standard drug test?

Nicotine does not usually show up on a standard drug test; a cotinine test normally has to be requested specifically.

How long does cotinine stay in urine?

Cotinine typically stays in urine for about 2–5 days, depending on how much and how often nicotine is used.

How long does nicotine stay in saliva?

Nicotine and cotinine usually stay in saliva for about 1–2 days.

Can second-hand exposure cause a positive result?

Second-hand exposure is unlikely to cause a positive result at typical cut-off levels, unless exposure is regular, such as living with someone who smokes indoors.

Do nicotine pouches change detection times?

Nicotine pouches do not meaningfully change detection times, because cotinine detection is broadly similar across nicotine products.

References

Committee on Toxicity (UK). Statement on the bioavailability of nicotine from oral nicotine pouches.
Clinical laboratory guidance on cotinine metabolism, half-life and testing.