[ConservingFreedom]

I have two family members who developed cannabis psychosis. They became delusional, hostile, and reclusive. This was within months of starting heavy use

Heavy use of the mind-altering drug alcohol will screw one up too - doesn't mean it should be banned.

[cassiusking]

The problem is Medical Marijuana is now Big Business and no one is monitoring or educating users about warning signs. We all know the hazards of drinking but nothing is being done to warn people flooding into Legal Marijuana stores. They should be warned that 10-15% will become cannabis psychotic - hostile, withdrawn, loss of motivation, false memory, anxiety ,paranoia...

http://cannabisandpsychosis.ca/more-information/what-do-we-know/psychosis/what-is-psychosis/