Cannabis addiction is one of the most debated and misunderstood areas in addiction medicine. The short answer is yes — cannabis can and does cause dependency. The longer answer is that the picture is more nuanced than with alcohol or opioids, which is partly why so many people who are dependent on cannabis don’t recognise themselves in the word “addiction” at all.
People often dismiss cannabis dependence because its withdrawal isn’t usually medically dangerous in the way that alcohol or benzodiazepine withdrawal can be. But medical danger isn’t what defines addiction. A person can still become steadily more reliant on cannabis to sleep, manage anxiety, cope with stress or feel able to function normally — and that reliance is the thing that matters.
The proportion of adults aged 16 to 64 in England showing signs of cannabis dependence nearly doubled, from 2.8% in 2014 to 5.4% in 2023 to 2024, according to the Adult Psychiatric Morbidity Survey.
Over the same period, past-year cannabis use increased more modestly, from 7.2% to 8.7%.
NHS England notes that the rise in dependence may reflect increasing cannabis potency, changing products and newer methods of use, including cannabinoid vaping. Cannabis was also recorded as a problem substance for 22.2% of adults starting drug and alcohol treatment in England during 2024 to 2025.
Cannabis goes by many names — weed, marijuana, skunk, hash and pot. These can refer to different forms of the cannabis plant, but they share the same main active compounds: THC, or tetrahydrocannabinol, which produces the high, and CBD, or cannabidiol, which does not.
The form matters because potency and the amount of THC delivered can vary widely. Herbal cannabis — what most people call weed or skunk — is commonly smoked in joints, pipes or bongs. Resin or hash is made from compressed cannabis material. Neither form has a reliably predictable strength.
Cannabis vapes and concentrates may deliver high levels of THC, while illegally supplied products may not contain what the user expects. Their discreet format — less smell, little preparation and no obvious smoking ritual — can also make frequent use easier to overlook. A lot of people vaping cannabis daily don’t think of themselves as cannabis users in the traditional sense at all. That gap between the behaviour and the self-image is one of the ways dependency hides.
Cannabis dependence develops differently from alcohol or opioid dependence, which is one reason it can be underestimated. Cannabis withdrawal is generally not medically dangerous in the same way as withdrawal from alcohol or benzodiazepines, but it can still cause significant sleep disruption, irritability, anxiety, low mood and cravings.
With repeated exposure to THC, tolerance can develop. This means that someone may need more cannabis, stronger cannabis or more frequent use to produce the effect they previously experienced.
Over time, cannabis stops being something that produces a noticeable high and becomes something that feels necessary to feel normal. The high disappears; the need stays. This is the part almost nobody outside it understands, and almost everybody inside it recognises: long-term users often describe using not to get stoned, but to function — to sleep, to take the edge off anxiety or to get through an ordinary evening without the restlessness and irritability that appear when they don’t use.
That shift — from using to feel something to using to avoid feeling something else — is a common feature of
drug addiction, whatever the substance. With cannabis, it can happen so gradually that a person crosses that line without noticing it.
Cannabis dependency is easy to minimise, partly because it builds so slowly and partly because the cultural story around cannabis — that it’s natural, relatively harmless and not really a drug in the same way — provides a ready-made justification at every turn.
Some things worth paying honest attention to include:
Plenty of people who have used cannabis for years will recognise several of these without ever having called it a problem. The useful question isn’t whether the word “addiction” fits — that argument can run forever. It’s simpler and harder than that: is this a pattern you could actually change easily if you decided to?
For a lot of people, the honest answer to that question is the moment the picture comes into focus.
The relationship between cannabis and mental health runs in both directions, and it is central to why cannabis dependency can be so persistent.
Cannabis is widely used to manage anxiety, low mood and the discomfort associated with stress or trauma. In the short term, it may provide relief, which is exactly what can make the pattern so difficult to interrupt.
Regular heavy use, particularly of high-THC cannabis, can worsen anxiety, depression or paranoia for some people and is associated with psychotic symptoms in some cases.
That can create a difficult loop. Cannabis may provide short-term relief from anxiety while regular use contributes to worsening anxiety, low mood or paranoia. The person may then use more cannabis to manage symptoms that the cannabis is also contributing to.
When cannabis dependency occurs alongside an anxiety disorder, depression, trauma or another mental-health difficulty, both should be assessed and addressed together. This is often known as dual diagnosis.
Some people with ADHD use cannabis to manage restlessness, sleep difficulties, emotional overwhelm or anxiety. The overlap between neurodivergence, self-medication and dependency is explored in more detail in our guide to addiction and neurodivergence.
People who use cannabis regularly can experience withdrawal when they reduce or stop. Symptoms may include irritability, anxiety, disrupted sleep, vivid dreams, low mood, restlessness, appetite changes and cravings.
Cannabis withdrawal is not usually medically dangerous in the same way as withdrawal from alcohol or benzodiazepines, but it can still be difficult and may contribute to returning to use.
Our guide to cannabis withdrawal, symptoms and timeline explains what to expect and the support that may help.
Support may be worth considering where cannabis use is daily or difficult to control, attempts to stop have not lasted, mental health is worsening or everyday life has become increasingly organised around using.
Some people begin with their GP or a community drug service, you can learn more about different services on our getting help page. Where more structure and time away from the usual environment may be appropriate, our cannabis rehab page explains the treatment available at Abbington House.
