Do you have to tell your insurer about a medical cannabis prescription?

Insurance runs on disclosure. The rule that matters is not whether cannabis is involved but whether you answered the questions accurately — and an inaccurate answer can leave you uninsured at the worst possible moment.

What the law actually requires

For consumer insurance, you must take reasonable care not to make a misrepresentation. In practice that means answering the insurer's questions honestly and completely; you are not required to volunteer things they have not asked.

The consequences of getting it wrong depend on whether the misrepresentation was deliberate or careless. A deliberate one can allow the insurer to avoid the policy entirely and keep the premium. A careless one is treated more proportionately, but can still reduce or remove a payout.

The practical lesson is simple. If a form asks whether you take prescribed medication, or asks you to list your medicines or medical conditions, answer it fully. Do not decide for yourself that something is irrelevant. An insurer is entitled to decide what matters to the risk it is taking on, and the safest assumption is that anything they ask about, they consider relevant. If in doubt, disclose and let them assess it — that is exactly the situation the reasonable-care standard is designed to reward.

What different insurers tend to ask

Different policies care about different things, and the question about cannabis is rarely asked directly. It is usually captured by a broader question about medication or conditions.

Where a form asks about recreational drug use, a prescribed medicine is not recreational use — but say so clearly rather than answering no and leaving it ambiguous. If there is a free-text box, use it.

Practical steps

A little care at the application stage prevents most of the problems that arise at the claim stage.

1. Answer questions about medication and conditions fully, naming the medicine as prescribed
2. Keep a copy of what you declared, including screenshots of online forms
3. If a question is ambiguous, ask the insurer in writing and keep the reply
4. For travel, declare the condition as well as the medicine
5. If declined, try a specialist broker — declared-condition markets exist
6. Re-check at renewal; a change in treatment is a change in your circumstances

If an insurer refuses a claim on disclosure grounds and you believe you answered correctly, the Financial Ombudsman Service can review the decision free of charge. This is where the records you kept earn their place: an ombudsman can only judge what you were asked against what you answered, and being able to produce the actual questions and your actual replies is far more persuasive than a recollection of a conversation. Keeping that evidence costs nothing and turns a dispute you might otherwise lose into one you can properly contest.

Why this is really about accuracy, not cannabis

It is easy to assume that a cannabis prescription is the problem an insurer cares about. In most cases it is not the medicine itself that drives the decision — it is whether you answered the questions accurately, and what the underlying condition means for the risk.

Underwriters price risk. For life, health and travel cover, the condition being treated usually tells them far more than the name of any single medicine, and a prescribed medicine is simply part of an accurate picture of your health. Framed that way, the task is not to argue about cannabis but to make sure your answers are complete and correct, so that whatever decision the insurer reaches is one they cannot later unpick.

The reason this matters so much is timing. Non-disclosure is rarely discovered when you buy a policy; it surfaces when you claim, which is exactly when you need the cover to hold. A policy that pays is worth more than a cheap policy that does not, and accuracy at the outset is what keeps the cover intact.

Questions worth asking before you buy

A few direct questions at the application stage remove most of the uncertainty. Ask them in writing where you can, so you have a record of the answer.

• Does this policy ask me to list my medicines and conditions, and where exactly do I do that?
• Do I need to report a change in medication or treatment mid-term, or only at renewal?
• Is there a free-text box where I can state that a medicine is prescribed by a specialist?
• For travel, are you covering the underlying condition as well as unrelated emergencies?
• If you cannot offer cover, can you point me to a specialist or broker who covers declared conditions?

If an answer is unclear, treat that as a reason to get it in writing rather than a reason to guess. An insurer's own written confirmation of what they need is the best evidence you can hold.

When your circumstances change

Insurance reflects your circumstances at the point you answer the questions, and those circumstances can change. Treatment starting, stopping or changing can all be relevant.

At renewal you are answering the questions afresh, so make sure your answers reflect your current treatment rather than last year's. Mid-term, some policies require you to report a material change; if you are unsure whether something counts, ask. And where a condition or its treatment affects your driving, remember that the DVLA is a separate obligation from your insurer — the two are connected but not the same, as set out in can you drive on a medical cannabis prescription?

One caveat before you rely on any of this

This is general information about how the rules on insurance disclosure work, not legal advice, and it cannot take account of your circumstances.

The law changes, enforcement practice varies, and the details of your own case matter. If something here could affect your licence, your job or your liberty, get advice from someone qualified to give it — a solicitor, your prescriber, or the relevant authority itself. Where we can point you at the primary source, we have.

Patient guide · Written by the Flora House editorial team · Last reviewed: 2 November 2026