Half life of nicotine vs Caffeine

[robw]

Nicotine half life is 60 min
Caffeine half life is 3-4 hours

Just so you know.

[Nuck]

Nicotine half life is 60 min
Caffeine half life is 3-4 hours

Just so you know.

I've seen a few different values but I believe nicotine half life is 2 hours.

[robw]

Howstuffworks is where I got the info

[taz3cat]

When does it lose the other 1/2 of it's life?

[MonkeyMonk]

taz3cat it goes like this: 1/2, 1/4, 1/8, 1/16, 1/32... to infinity

I, too am finding 2 hours more frequently being cited for Nicotine half life.

Here is an interesting paragraph from the following link:
Google Answers: Nicotine and Cotinine tests
"Nicotine is cleared from the blood by liver enzymes that convert it to
its metabolite cotinine. Blood analysis showed that it took an average
of 152 minutes for half the injected nicotine to degrade in the blood
of the Chinese-Americans in this study. Nicotine's half-life in whites
and Latinos was 134 and 122 minutes, respectively. Slow metabolism of
nicotine draws out its effects, says Neal L. Benowitz, a clinical
pharmacologist at the University of California, San Francisco. He and
his colleagues report their work in the Jan. 16 Journal of the
National Cancer Institute.?
http://www.sciencenews.org/articles/20020119/fob6.asp"

SmokeHelp's Frequently Asked Questions
"How Long Can Nicotine Be Found in a Blood or Urine Test.
1 year assuming you are not working or living in the presence of second-hand smoke."

It is my understanding that cotinine is what is tested for when testing is done to determine if a person is a smoker. This link is about Cotinine:
FBR Cotinine Pamphlet
(It cites 7-10 days to reduce to that of a smoker. However, I have read that long term chain smokers might be able to be detected for up to 3 months or longer.)

Also, I posted this link in a different thread before. I do not know if the product works, but this is just an FYI that there are things like this out there:
Pass Nicotine Drug Test - Insurance Blood Drug Testing

[taz3cat]

Monkeymonk, thanks for the infromation. Those who have to take a test for nicotinee may have problems. I don't know what has happen to our rights of privacy. Maybe we will have need to have another Boston Tea party. I just love partys.

[Stogie]

interesting stuff, where wuld alcohol fit in comparison?

[MonkeyMonk]

Hey, Taz3cat, Kate was/is our hero! She taught us well.
Thanks for the thanks, but it is to Kate we owe the thanks.

[taz3cat]

thanks, Kate, we miss you.

[flexy123]

HL of N depends.

For someone who is a heavy smoker HL of N can be as low as 20mins, but usually i see numbers quoted ranging from 30mins-60mins.

For a non smoker, HL of N can be as long as 2 hours.