Medicines and Driving: Common Questions
The legal and practical rules on driving while taking medicines.
Last revised
Medicines and Driving: the questions people actually ask, answered from published guidance.
Key takeaways
- Offence: driving while impaired by any drug, prescribed or not
- Specified limits: apply to certain drugs including some benzodiazepines and opioids
- Most useful single change: Ask the pharmacist whether a new medicine affects driving.
- Commonest mistake: Driving while drowsy, whatever the cause.
- See a doctor if any of the signs under "When to get help" below apply to you.
What is Medicines and Driving?
The legal and practical rules on driving while taking medicines.
Why does it matter?
It is an offence to drive impaired by prescribed medicines, and several common ones impair more than people expect.
Specified limits for Medicines and Driving?
Apply to certain drugs including some benzodiazepines and opioids.
Statutory defence for Medicines and Driving?
Available if taking them as prescribed and not impaired.
Highest risk period for Medicines and Driving?
The first days after starting or a dose change.
What is the single most useful thing to do?
Ask the pharmacist whether a new medicine affects driving.
What is the most common mistake?
Driving while drowsy, whatever the cause.
When should I see a doctor?
Do not drive if you feel drowsy, dizzy or slowed. Inform the DVLA of any condition affecting driving, including conditions causing excessive sleepiness or severe hypoglycaemia. Seek urgent advice for confusion or fainting on a new medicine.
Where to go next
- Medicines and Driving: What to Do, in Order
- Popular Beliefs About Medicines and Driving, and What Is Actually Published
- Medicines and Driving — the reference entry
- Storing Medicines: What Published Guidance Supports
- Drug Interactions: Sorting the Evidence From the Noise
When to get help
Do not drive if you feel drowsy, dizzy or slowed. Inform the DVLA of any condition affecting driving, including conditions causing excessive sleepiness or severe hypoglycaemia. Seek urgent advice for confusion or fainting on a new medicine.
Where this comes from
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.
