How long is nicotine detectable in blood test? my buddy went to job interview and they test for it using blood.

Quit: I would first tell your friend to seek medical attention to discuss tobacco cessation. Most nicotine should be out of the body a few days after quitting. Then again, if he uses nicotine gum it may show on blood test as well. Be a good friend and help him quit :).

Possibly 1 year: While most nicotine is gone within 3-7 days, as detected by urine, 3-6mos by hair, blood test depending on type can detect traces of metabolites up to one year. Hard to answer as some test can detect traces even if you were only exposed to a smoker and not even smoke yourself.

Depending upon the : Quantity of cigarettes smoked, nicotine can be detected in the urine for 2-7 days and in the blood for a month or longer after quitting. Passive smoking can cause nicotine to be detected in the blood or urine for longer period of time.