The gateway drug theory and many other ideas about drug ... Because the use of one substance like alcohol or nicotine is associated with the use of other drugs like cannabis, many have drawn ...

Nicotine may alter the brain’s response to cocaine, supporting the idea that the legal drug may serve as a "gateway" to the use of illegal substances. The measles virus attacks long-lived immune cells ...

Behler said tobacco is a gateway drug, with users starting with nicotine and later evolving to using “harder substances.” Preventing youth from accessing tobacco early will end up decreasing ...