how long does nicotine stay within your bloodstream?

how long does nicotine stay within your bloodstream?
24hrs
If you are a normal fully fledged, with run of the mill liver function, the half time of nicotine will be about 2 hours. This manner that more than 99% will be gone after 10 hours. This is usually the level which we speak 'it's gone', 5 half lives.
Note that while it vary by race and inheritance (there are several versions of the enzyme that breaks down nicotine) as in good health as meals- because liver blood flow is greater after a meal, more nicotine is eliminate faster- it doesn't vary much if you are a long permanent status or a short term smoker.
By the mode, the increased liver blood flow after a meal is thought to be one basis why smokers get a strong craving after consumption, their before buffet nicotine is metabolized faster, leading to lower blood level and an 'urge'.
2o-3o ng/ml falls to half inside about 10 mins & afterwards slowly over next 1-2 hrs.Thisb is cause by the one cigarette.