A problematic pattern of cannabis use leading to clinically significant impairment or distress. Typically includes a strong desire to take the drug, difficulties in controlling its use, persisting in its use despite harmful consequences, a higher priority given to drug use than to other activities and obligations, increased tolerance, and sometimes a physical withdrawal state.

Predictions:
Episodic/Continuous For Years
 Occupational-Economic:
• Causes academic and/or vocational impairment (due to impairment of memory and motivation)
Cooperation:
• Some develop suspiciousness, social withdrawal
Justice:
• Marital/child neglect in heavy users; legal problems Wisdom:
• Memory loss, learning impairment, apathy (even when not intoxicated)• Cognitive impairment when intoxicated• Can cause delusions, hallucinations; triggers schizophrenia in 4% of users
 Self-Control:
• Intoxicated behavior, impaired driving• Impulsivity, dangerous risk taking, irresponsibility

Retrieved from: Mentalhealth.com