The best defense for positive opiate test results is the claim of eating poppy seed–containing food prior to the drug test. Although consuming poppy seeds may result in positive morphine or codeine levels in biological matrices, semisynthetic opioids such as oxycodone, hydromorphone, hydrocodone, oxycodone, and heroin are not found in poppy seeds, and the presence of any one of these compounds in a specimen is not consistent with ingestion of poppy seed food. Passive inhalation of marijuana may be used as a defense against confirmed Δ9-tetrahydrocannabinol (Δ9-THC) test results; however, several reports indicate that such passive inhalation usually does not yield concentrations above marijuana screening method cutoffs in urine, but concentrations can be above positive cutoffs in oral fluid. Similarly, ingestion of hemp or cannabidiol (CBD) products, which may contain trace amounts of Δ9-THC, are unlikely to result in 11-nor-9-carboxy-Δ9-tetrahydrocannabinol (THC-COOH) concentrations above screening positivity limits in urine, but Δ9-THC measured in blood or oral fluid may be above test positivity cutoffs.