Quote:
Originally posted by milt
You can do a Google search on the subject. I had to take a drug test and I did the search and learned a lot. I had taken some cold medicine with codeine and knew I'd fail. However, I drank about 3 gallons of water in 24 hours and flushed my system out pretty well. I passed (I passed a lot of water, too  ).
Apparently, pot doesn't flush out like that and it takes a week or more. That is unless they do a hair analysis. Hair shows drug use as far back is the hair is long. So, shave your head. 
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As long as we are going this deep on drug scans, and considering that I used to be the person who ran the program overseas for McDonnell Douglas...
Hair shows whatever you consumed for a long time. Forget exactly how long but if the hair is long enough it will bust you easily. Edgar Allen Poe was a known user of opiates and a piece of his hair was tested and came up positive. Oh yea, he died over 150 years ago and the hair test still worked.
Another gotcha is your fingernails. One new thing in the drug screen library is that HR will ask for a clipping of one of your fingernails. Its then tested in the same manner that hair is and is just as accurate. Unless you want to pull your finger and toe-nails out, these will bite you in the rear if you are doing drugs and are tested.
Pot will stay in a persons fat cells for up to 3 MONTHS, not weeks. The more rotund a person is the worse it is, and the more frequent a pot smoker they are the longer it takes to get out of their system.
Now the good news. There is a reason why people who get tested often do speed (meth) and blow (coke) as its usually out of your system (the pee test) in a few days. It IS NOT out of your hair and fingernails but most low level testing facilities do not use these tests.