When you introduce substances regularly, your brain recalibrates around having those substances present, like reprogramming a thermostat
Young | Dreamstime Last Updated: July 1, 2014
This is because the federal excise tax is not keeping up with inflation (thanks to successful lobbying by the tobacco companies), and because of worries that increasing taxes will increase the black market and interstate smuggling, as taxes vary by state (and tend to be lower in tobacco producing states, again due to lobbying)
Introduced in 1928 by Macdonald Tobacco as Macdonald's Gold Standard, the boxes were marked "Export", and were quickly known under that name
Nonetheless, evidence from single-dose trials does suggest that the recommended daily dosage of bupropion when administered orally in divided doses is not likely to be significantly reinforcing to amphetamine or CNS stimulant abusers