<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Cannabis drug testing describes various drug test methodologies for the use of cannabis in medicine, sport, and law . Cannabis use is highly detectable and can be detected by urinalysis, hair analysis, as well as saliva tests for days or weeks . </P> <P> Unlike alcohol, for which impairment can be reasonably measured using a breathalyser (and confirmed with a blood alcohol content measurement), valid detection for cannabis is time - consuming, and tests cannot determine an approximate degree of impairment . The lack of suitable tests and agreed - upon intoxication levels is an issue in the legality of cannabis debate, especially regarding intoxicated driving . </P>

How do they test for weed in your system