Can you become dependent on prescribed cannabis?

This is the question people are most reluctant to ask and most deserve a straight answer to. Tolerance develops in many people. Dependence is possible. Neither is a reason to avoid treatment, and both are reasons to have a prescriber who is paying attention.

Tolerance

Repeated exposure to THC leads the body to reduce the availability of the receptors it acts on. The practical result is that the same amount produces less effect over time.

This affects different effects differently. Tolerance to the intoxicating and sedating effects tends to develop relatively quickly; whether tolerance to a therapeutic effect develops at the same rate is less clear and probably varies.

The important clinical signal is a pattern of needing steadily more for the same result. That is a prompt to review the treatment — possibly a planned break, possibly a change of route, possibly a conclusion that it is not working — rather than to keep increasing.

Dependence

Dependence means the body has adapted to the presence of the drug, so stopping produces withdrawal symptoms. It can develop with prescribed use, and it is more likely with higher exposure over longer periods.

It is worth separating two things that get conflated. Physical dependence is a predictable pharmacological adaptation that happens with many medicines, including ones nobody worries about. Problematic use — craving, loss of control, continuing despite harm — is a different and less common phenomenon.

Risk is higher with a personal or family history of substance use problems, with daily high exposure, and where the medicine is being used for a purpose it was not prescribed for. A prescriber should be asking about all three, and honest answers get you better care.

What withdrawal is like

Cannabis withdrawal is genuinely unpleasant and not medically dangerous in the way alcohol or benzodiazepine withdrawal can be. Symptoms usually begin within a day or two of stopping and ease over one to two weeks.

• Irritability, restlessness or low mood
• Difficulty sleeping, and vivid or disturbed dreams
• Reduced appetite
• Sweating, chills or headache
• A return of the original symptom, which can be hard to distinguish from withdrawal

That last point matters. When someone stops and their pain or anxiety returns, it is not always obvious whether the underlying condition has resurfaced or whether this is withdrawal. Reducing gradually rather than stopping abruptly helps separate the two.

Stopping properly

Plan it with your prescriber. Abrupt stopping is the route most likely to produce an unpleasant experience and a misleading conclusion about whether treatment was helping.

1. Tell your prescriber you want to stop, and why — the reason changes the plan
2. Agree a gradual reduction rather than stopping at once
3. Pick a period without major stressors where you can
4. Keep a record of symptoms so withdrawal and the underlying condition can be told apart
5. Agree what happens if symptoms return, so there is a plan rather than a crisis

Stopping is also the correct outcome of a trial that has not worked, and there is nothing wrong with reaching it. A prescriber who treats stopping as a failure, or who has no plan for it, is not managing the treatment well.

Patient guide · Written by the Flora House editorial team · Last reviewed: 8 September 2026