What cotinine level typically indicates regular cigarette use?

Cotinine is a metabolite of nicotine and is commonly measured to assess tobacco exposure. Regular cigarette use is typically indicated by cotinine levels above a certain threshold, reflecting consistent and prolonged exposure to nicotine.

A cotinine level around 14 ng/mL is generally considered a marker of regular smoking habits. This level suggests a steady intake of nicotine, distinguishing it from low levels seen in infrequent smokers or those exposed to secondhand smoke. For instance, non-smokers usually have cotinine levels below 1 ng/mL, while individuals who smoke occasionally may present with levels up to 10 ng/mL, indicating sporadic use rather than regular smoking.

Understanding the implications of these different cotinine levels is crucial in addiction medicine, as it helps in assessing tobacco dependence and guiding cessation strategies. Regular smokers are more likely to have levels that reflect their habit, typically around or above the mentioned threshold, indicating they are consuming nicotine on a daily basis.