Smoking other diagnostic studies

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Usama Talib, BSc, MD [2]Aravind Kuchkuntla, M.B.B.S[3]

Breath carbon monoxide can be used to assess the presence of smoking in the last 24 hours.

• Breath carbon monoxide can be used to assess the presence of smoking in the last 24 hours.
• Cotinine, a metabolite of nicotine, can be found in urine, saliva, and blood for up to 7 days after tobacco use.

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