Butterfly, in one final attempt to show you the truth, I will quote from Erowid myself.
"Blood Testing
Cannabis is detectable in the blood for approximately 2-3 days after use in an infrequent user. Frequent use can be detected in the blood for approximately 2 weeks." http://www.erowid.org/plants/cannabi..._testing.shtml

Please note that the 2 week time frame is as extreem and rare as the 12 week time frame use in the urine testing section of the same page.

Hope that helps you. N2
IamN2pot Reviewed by IamN2pot on . butterfly_UK Please help.... I have to undergo a pre-employment medical, which includes drug screening I have already handed in my notice at my current employment and now find myself in this terrible predicament I know they are going to take a blood testâ?¦so any factual tips and advice would be very helpful I last smoked weed/cannabis on the 6 June 2004 and the drugs test is on the 8th July 2004 oh i forget to say i have smoked weed/cannabis for years - at least 2 spliffs everyday Rating: 5