Cannabis in Arizona is legal for medical uses, but prohibited for recreational use.
Cannabis in Arizona Wikipedia
In 2010, Proposition 203, legalizing medical marijuana, was passed by voters, after passage of legally flawed initiatives in 1996 and 1998, and failure of a 2002 initiative.
In 2016, Proposition 205 to legalize recreational cannabis appears as a legalization initiative on the November ballot. The measure failed, 47.8–52.2.