Withdrawal timeline phase by phase
Below is the typical withdrawal timeline for cannabis. Individual experience varies — duration of use, average daily dose, polysubstance use, age, liver/kidney function, and co-occurring mental health all shift the pattern. The phases below describe the average presentation in clinical settings.
Phase 1 · Days 1–3
Early withdrawal
- Irritability
- Anxiety
- Sleep disturbance and vivid dreams
- Reduced appetite
- Restlessness
Phase 2 · Days 3–10
Peak withdrawal
- Insomnia worsens
- Cravings peak
- Mood depressed and irritable
- Sometimes night sweats and chills
- Cannabinoid hyperemesis (cyclical vomiting) in chronic heavy users
Phase 3 · Weeks 2–4
Resolution
- Sleep gradually improves over 2–4 weeks
- Mood stabilises
- Cravings reduce
- Cognitive sharpness improves over weeks
Medications and medical management
No specific anti-craving medication. Short-term sleep support (mirtazapine, melatonin) may be useful for the first 2–3 weeks. Treatment of co-occurring anxiety or depression as appropriate.
Where to detox safely
Outpatient counselling and group programs are first-line. SMART Recovery and similar programs work well. Residential reserved for severe presentations, polysubstance use, or where home is too disrupted.
When to call 000
What helps in the post-acute phase
The hardest part of cannabis withdrawal is rarely the first few days — it is the weeks that follow. Sleep is disrupted, mood is low, cravings come and go in waves, and cognitive sharpness recovers slowly. The interventions that consistently help: structured psychological therapy (CBT, motivational interviewing, mindfulness-based relapse prevention), peer support (SMART Recovery, AA, NA, CA — choose by fit), continued GP and addiction-medicine follow-up, ongoing relapse-prevention medication where relevant, and a written relapse-prevention plan that names triggers and rehearsed responses.
People who engage with structured aftercare for 12 months or more after a withdrawal episode have dramatically better long-term outcomes than people who treat withdrawal as a one-off event. The single most predictive question to ask any program: "What does aftercare look like in the 12 months after I leave?"
Frequently asked questions
How long does cannabis withdrawal last?
Acute cannabis withdrawal typically lasts 2–4. Post-acute symptoms — sleep, mood, cravings — can persist for weeks to months. The acute phase is the medically dangerous one; the post-acute phase is uncomfortable but rarely dangerous.
Is cannabis withdrawal dangerous?
Cannabis withdrawal is not directly life-threatening but is uncomfortable and produces high relapse risk if unmanaged. Cannabis withdrawal is not life-threatening. Symptoms are uncomfortable but manageable in an outpatient setting. Cannabis-induced psychosis IS a medical emergency, but is associated with use rather than withdrawal.
Can I detox from cannabis at home?
Yes, in many cases. Outpatient counselling and group programs are first-line. SMART Recovery and similar programs work well. Residential reserved for severe presentations, polysubstance use, or where home is too disrupted. For supervised home detox, your state alcohol and drug line can refer you to a community AOD nurse who can visit daily.
What medications help with cannabis withdrawal?
No specific anti-craving medication. Short-term sleep support (mirtazapine, melatonin) may be useful for the first 2–3 weeks. Treatment of co-occurring anxiety or depression as appropriate.