28 Feb 2010
In the body Nicotine is metabolised to Cotinine.
The half Life of Cotinine is 15-20 hours.
The half life of nicotine is 1 - 3 hours.
This means that every 15 to 20 hours, half of the previous amount of Continine in the body disappears, or every 1 - 3 hours half of the previous amount of Nicotine in the body disappears.
Because cotinine has such a long half life, and it remains in the system for such a long time it is easy to test for its presence.
It takes roughly around 6 half lives for a drug to be completely eliminated ie 5 to 6 days.
This is just a guide only and is influenced by other factors such as age, general health, weight etc.
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