Cannabis Detox in the UK
The short answer
Cannabis withdrawal is real but not dangerous: broken sleep, irritability, sweating and appetite loss for 1–2 weeks. There is no medical detox, so treatment is therapy-led. A residential stay is usually only needed when use is heavy, daily and tied to psychosis or a mental health condition.
Call 0800 000 0000 for a confirmed priceWhat it costs
| Option | Detox | 28 days |
|---|---|---|
| NHS community detox Prescribed and reviewed locally; suitable for lower-risk withdrawal. | Free | 1–3 week assessment wait |
| Private inpatient detox CQC-registered, 24-hour observation through the risk window. | £1,500–£3,000 | 1–2 weeks of acute symptoms; sleep normalises over 3–4 weeks |
| Detox plus 28-day programme Detox followed by the therapy programme that prevents an immediate relapse. | £1,500–£3,000 | £3,500–£13,000 |
These are market ranges gathered across CQC-registered UK providers, not quotes. Only the clinic can confirm a final price, and it depends on your assessment. Prices checked July 2026.
Cannabis detox timeline
Days 1–3
Irritability, vivid dreams, sweating and appetite loss begin.
Days 4–10
Symptoms peak then ease. Insomnia is the most persistent complaint.
Weeks 3–4
Sleep and mood normalise. Most relapses happen because nothing replaced the evening routine.
How risky is it, honestly
Withdrawal carries no seizure or cardiac risk. Heavy high-THC use can trigger or worsen psychosis, which needs psychiatric assessment rather than a detox bed.
Medication typically used
- No substitute prescription exists
- Short-term sleep support in the first week
- Psychiatric review where there is paranoia or psychosis
Can you do a cannabis detox at home?
A cannabis detox at home is realistic for most people. Plan for two weeks of bad sleep, get support in place for the evenings, and treat any underlying anxiety rather than white-knuckling it.
This page is general information, not medical advice for your situation. If you are physically dependent, speak to a doctor before you change your intake — including reducing it.
Common questions
How long does a cannabis detox take?
1–2 weeks of acute symptoms; sleep normalises over 3–4 weeks. Cannabis withdrawal is real but not dangerous: broken sleep, irritability, sweating and appetite loss for 1–2 weeks. There is no medical detox, so treatment is therapy-led. A residential stay is usually only needed when use is heavy, daily and tied to psychosis or a mental health condition.
Is a cannabis detox dangerous?
Withdrawal carries no seizure or cardiac risk. Heavy high-THC use can trigger or worsen psychosis, which needs psychiatric assessment rather than a detox bed.
Can I detox from cannabis at home?
A cannabis detox at home is realistic for most people. Plan for two weeks of bad sleep, get support in place for the evenings, and treat any underlying anxiety rather than white-knuckling it.
What medication is used for a cannabis detox?
No substitute prescription exists; Short-term sleep support in the first week; Psychiatric review where there is paranoia or psychosis. Everything is prescribed and reviewed by a doctor — nothing here should be sourced privately or online.
How much does a private cannabis detox cost?
Expect £1,500–£3,000 for a medically supervised inpatient detox, depending on length of stay and room type. NHS community detox is free but involves an assessment wait.
Do I need rehab afterwards?
Detox handles the chemistry, not the habit. Relapse rates after detox alone are high, so plan the following four weeks before you start — a residential programme, structured outpatient therapy, or at minimum a weekly group and a named person to call.