Cannabis Addiction & Treatment

Treating Cannabis Addiction

Cannabis, or Marijuana, is a plant-derived, psychoactive drug that is generally smoked. Its effects include changes in perception and mood, as well as feelings of euphoria, or relaxation.

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However, users may also experience negative effects such as paranoia, or anxiety. Increased appetite, sleepiness, and short term memory impairment are more common effects of smoking cannabis.

Cannabis can sometimes act as a ‘gateway drug’, meaning that users may start off taking this drug before moving onto harder drugs in search of a stronger high. Drug dealers selling harder drugs in addition to cannabis will inevitably ask clients if they would like to sample these too.

Negative Health Impact of Smoking Cannabis

Cannabis has a reputation as a ‘soft’ drug, but it can damage both physical and mental health in a number of ways.

Cannabis can interrupt the user’s sleep pattern, and cause changes in mood, which can, in turn, lead to depression. Increasing evidence has linked cannabis use to the emergence of mental health disorders in people that are predisposed to psychological disorders. In extreme cases, heavy cannabis use can trigger a psychotic episode.

These psychological effects have been linked in particular to the potent ‘skunk’ variety of cannabis, which contains high levels of THC. This is now the main type of cannabis that can be found on the street in the UK.

Long-term cannabis use can have a damaging effect on memory and concentration abilities.

High doses of cannabis can cause psychosis or panic. Some people experience an acute psychotic reaction (disturbed perceptions and thoughts, paranoia) or panic attacks while under the influence of cannabis.

There is a strong link between cannabis use starting before the age of 16 and schizophrenia in late life. Cannabis use can also worsen psychotic symptoms in people who already have schizophrenia.

According to different studies and reports, cannabis consumption can also result in:

  • Acute memory loss
  • Depression
  • Weakened immune system
  • Severe vomiting sickness
  • Paranoia
  • Psychosis

Cannabis Withdrawal: Symptoms, Timelines and Support

While marijuana withdrawal isn’t as dangerous as opioid and benzodiazepine withdrawal, users still experience unpleasant withdrawal symptoms when trying to quit.

Many people often opt to detox at home because they believe that cannabis withdrawal doesn’t require a medical detox, however, despite the mild withdrawal symptoms, there is still a risk of experiencing complications. 

 Yes, I want sobriety: call 0808 271 7500.

While the majority of withdrawal symptoms are psychological, it is still advised you complete your detox with a registered rehab clinic.  

If you have developed a cannabis use disorder and wish to find out more about cannabis withdrawal, detox and treatment, get in touch with our admissions team today. 

Cannabis Withdrawal Symptoms

As is the case with most addictive substances, heavy marijuana use for prolonged periods can lead to withdrawal symptoms when a person tries to stop. 

Withdrawal will affect each person differently depending on a number of factors such as duration of use, gender, height, weight and general health. Users who have developed a mild dependence on the drug may be able to stop using relatively quickly. However, chronic users who have built up a tolerance might need more help overcoming their addiction.

The symptoms of cannabis withdrawal can manifest both physically and psychologically. 

Physical Withdrawal Symptoms of Weed Addiction

The physical symptoms of marijuana withdrawal are not too severe and typically peak sooner than the psychological symptoms. The frequency and amount of marijuana used prior to stopping will affect the severity of the withdrawal symptoms.

Some of the most common physical symptoms of marijuana withdrawal include: 

  1. Stomach pains/abdominal pain
  2. Changes in appetite or weight loss or weight gain
  3. Sleep problems, Disturbing dreams
  4. Headaches, vomiting
  5. Restlessness and Sweats, chills, tremors, fever and other flu-like symptoms
  6. Nicotine withdrawal (if you smoke cannabis with tobacco)

The effects of withdrawal will vary in severity for each user, and although they are not dangerous, some may experience uncomfortable withdrawal symptoms. In rare cases, marijuana withdrawal symptoms can cause complications, especially where someone has quit marijuana suddenly. It’s important to remember that the chances of experiencing marijuana withdrawal symptoms will increase based on the duration of use. 

Psychological Withdrawal Symptoms of Weed Addiction

A study by the British Journal of Psychiatry states that there is significant evidence that taking cannabis leads to acute adverse mental effects in a high proportion of regular users. Many of these effects are dose-related, but adverse symptoms may be aggravated by con- situational factors including youthfulness, personality attributes and vulnerability to serious mental disorders.  


Cravings involve the persistent desire to use cannabis during any period of abstinence. Although many regular cannabis users don’t believe they are addicted to the drug, users who had recently quit reported experiencing intense cravings for marijuana when abstinent. 


Irritability, mood swings and restlessness are common cannabis withdrawal symptoms and can range from mild annoyance to intense anger. It is recommended you seek the help of a therapist or counsellor if you begin to display symptoms of aggression that last for more than a week, as this could indicate a deeper issue being masked by substance abuse.  


Anxiety is a symptom often associated with a cannabis high, but it is also a distinctive sign of withdrawal. Anxiety and paranoia are often exacerbated once you stop using cannabis, which is why counselling and therapy are strongly advised as part of treatment, as there may have been an existing anxiety problem before you started using cannabis. 


While depression and persistent sadness is a well-known psychological withdrawal symptom, it’s important to remember that cannabis misuse can often mask other psychological issues such as depression. It’s important these potential issues are addressed once detox is complete, as this can increase your chances of maintaining sobriety.

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Cannabis Withdrawal Timeline

The cannabis withdrawal timeline and intensity of symptoms will depend on:

  • How much cannabis do you smoke
  • How frequently do you smoke cannabis 
  • If you quit ‘cold turkey’ rather than cutting down your use

However, users can typically expect: 

  • 1-3 days – Symptoms will be mild but noticeable 
  • 4-7 days – Symptoms will peak 
  • 8-10 days – Most symptoms will have stopped by this stage 

For chronic users, symptoms may continue for up to four weeks. This is because the active ingredients in cannabis are stored in the body’s fat cells and can take up to a month to be released.

 Are You Ready to quit for good? Call 0808 271 7500.

Residential Cannabis Addiction Treatment

Castle Craig has been successfully treating patients with drug and alcohol addiction for over 30 years. As one of the leading addiction clinics in the UK, we provide the highest quality of care to our patients.

Our cannabis addiction treatment programme is personally tailored to each patient based on their history of drug use and their individual treatment goals. Our treatment programme incorporates group therapy and personal therapy, alongside family therapy if appropriate.

We also offer a range of complementary therapies and activities which provide emotional and spiritual healing. These include drumming therapy, equine therapy, art, creative writing and mindfulness meditation.

We continue to support patients after they have completed their treatment with us by providing:

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Get in touch today

To find out how we can help you, please telephone Castle Craig on our 24-Hour Helpline: 0808 271 7500. or click here to arrange a free addiction assessment or here for more information.

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