How can we fuck up a blood test???

my friend is gonna have a bloodtest, on THC. Now, i only know how to fuck Piss and Hair Tests, but not how to fucK bloodtests.
Do you know any stuff to fuck blood tests???

 

I'm not sure, I'd just try my best to get any thc out of my system, of course that takes time...

 

i got this info from http://www.norml.com/index.cfm?Group_ID=4934#blood
here it is-

BLOOD TESTS: In some situations, including accidents and roadside sobriety checks, blood tests may be used. Blood tests are a much better gauge of current impairment than urine tests because they detect the actual presence of THC in the system; however, they can be sensitive to other metabolites as well. Blood tests generally register positive for just a few hours after smoking, though heavy chronic smokers may be positive for a couple of days. Less sensitive are saliva tests, which register positive for about 2-4 hours after smoking. If you have used marijuana in the last few days but are not currently under the influence, you should insist on a blood (or saliva) test instead of a urine test if at all possible, since you are more likely to turn up clean. On the other hand, if you have smoked recently, you may do better to take a urine test, since this will at least leave open the question as to whether you were under the influence. Also, urine doesn't turn positive until several minutes after smoking.

 

Thanks mate!

 

my pleasure