The short answer
Cannabis use disorder is not defined by one use, one symptom or moral failing. CDC describes a pattern of difficulty controlling use and continuing despite consequences. The information below can help someone decide whether they want a conversation with a professional; it cannot diagnose them.
Patterns worth noticing
Examples include using more than intended, wanting to cut down but being unable to, craving cannabis, spending substantial time around use, missing responsibilities, giving up activities, using in risky situations or continuing despite physical, emotional or relationship problems. Tolerance or withdrawal symptoms may also occur. Patterns and impact matter more than a single answer to a checklist.
What a checklist cannot tell you
A clinician can consider frequency, duration, health, medications and life circumstances. If use is not matching your goals, you can ask a family doctor or local substance-use service about support options. Support does not require waiting until a crisis. See our reassessment guide.
Quick FAQ
Does one sign prove cannabis use disorder?
No. A list of signs is not a diagnosis. A qualified professional can assess the pattern, duration and impact in context.
What patterns should prompt a closer look?
CDC lists using more than intended, unsuccessful attempts to cut down, cravings, time spent obtaining or using cannabis, role problems and continued use despite harm.
Where can someone start if they want help?
Health Canada suggests contacting a health care provider or local addiction treatment centre to discuss support options and goals.
Sources
- CDC: Cannabis use disorder -- recognized signs and functional impacts.
- Health Canada: Cannabis side effects -- problematic-use signs and help-seeking.
Sources checked 2026-09-25.