Sleep is the symptom people underestimate. It's usually the last thing to settle, and the dreams that come with it can be startling if you're not expecting them.
Why it gets worse first
Regular cannabis use suppresses REM sleep — the stage where most vivid dreaming happens. Your brain adapts by building up "REM pressure." When you stop, that pressure is released all at once, so for the first week or two you get a rebound: more REM than usual, packed into the night, which means longer, stranger, more emotionally intense dreams. Dreams about using are common and don't mean anything has gone wrong.
Falling asleep also gets harder for a while. If cannabis was part of your wind-down routine, your body has to relearn how to get drowsy without it, and withdrawal restlessness works against you at the same time.
Roughly how long
- Week 1–2: hardest. Trouble falling asleep, waking in the night, vivid or unpleasant dreams.
- Week 3–4: falling asleep gets easier for most people; dreams start to calm down but can stay vivid a while longer.
- Month 2+: sleep is normal or close to it for the large majority. A minority notice lighter sleep or occasional off nights for a couple of months.
What actually helps
- Keep a consistent wake time even when the night was bad — it's the strongest lever you have on sleep.
- Treat the dreams as a sign of recovery, not a problem to fix. They fade on their own.
- Cut caffeine earlier in the day than you normally would; withdrawal already makes sleep harder to come by.
- A wind-down routine that isn't a screen — a shower, reading, a short walk after dinner — gives your body a new cue to replace the old one.
If you're lying awake for more than about 20 minutes, get up and do something quiet in low light until you feel sleepy, then go back. Staying in bed frustrated trains your brain to associate the bed with being awake.