Cannabis

Cannabis, also known as wacky backy, marijuana, and hashish, was a psychoactive drug.

History
Hashish was used by the Hashashins which Marco Polo gave them their name. (TV: "Five Hundred Eyes")

In 1799, marijuana was legal. (PROSE: Christmas on a Rational Planet)

Jack Harkness and Owen Harper once investigated a village where a number of people's hair turned blue, finding that it was caused by cannabis contaminated with lazulium. (AUDIO: Expectant)

Rhys Williams once used the drug on Banana Boat's stag party in Amsterdam. (AUDIO: Visiting Hours)

In 2016, the Coal Hill School student Lowe sometimes smoked marijuana. (PROSE: Joyride)

By 2069, cannabis cigarettes were legal and were produced in Birmingham. (PROSE: Alien Bodies)