Yes and no. Broad spectrum and isolate are both THC free, therefore should not cause you to fail a drug test. Full spectrum can contain up to 0.3% THC, technically a barely traceable amount. However each body responds to THC differently, and overtime some may allow the buildup of the substance which can lead to a failed drug test. The tests also vary dramatically, and some can be more sensitive than others. While technically CBD hemp oil is legal in all 50 states, THC is not.