A ‘false positive’ is when you are drug tested and the initial screening result declares a detected result and the confirmatory result declares a negative or not-detected result.
The term ‘False Positive’ is an erroneous and misleading term as it does not necessarily mean that there was none of the drug (detected in the screening test) in your system, it may mean that the drug that was detected was below the confirmatory cut-off levels as stated in the Australian standard.