The FDA has attempted several times to get rid of menthol but faced pushback from Big Tobacco, members of Congress and competing political interests under both political parties
With cannabis still classified as a Schedule 1 drug under federal law, there are certain times when it might become problematic to test positive for marijuana
Nova Biomedical, pp 3767 Shoji T, Inai K, Yazaki Y, Sato Y, Takase H, Shitan N, Hashimoto T (2009) Multidrug and toxic compound extrusion-type transporters implicated in vacuolar sequestration of nicotine in tobacco roots
Neighborhood Patterns
Jpn J Genet 44:4754 Tanzer MM, Thompson WF, Law MD, Wernsman EA, Uknes S (1997) Characterization of post-transcriptionally suppressed transgene expression that confers resistance to tobacco etch virus infection in tobacco