BA · United Kingdom · updated 2026-06-01
British Airways medication liquid rules
Essential liquid medicines are exempt from the 100 ml rule on British Airways flights. You can carry more than 100 ml in hand luggage if you have supporting documentation — usually a prescription or a doctor's letter — and declare it at the security checkpoint.
Send these rules to whoever you're travelling with.
What to know before you pack
- Keep medicines in their original labelled packaging so the name matches your documentation.
- Insulin, inhalers, liquid painkillers, eye drops and gel cold packs used medically all count as essential medicines.
- Split your supply between hand luggage and hold luggage where possible in case of delays or lost bags.
- Musical instruments up to 126×30×38 cm may replace your cabin bag.
- Suit carriers up to 60×110×11 cm are allowed as an additional handbag on some fares.
- Vape devices, spare batteries and power banks must be cabin-only, protected against activation.
British Airways cabin bag at a glance
Personal item: 40 × 30 × 15 cm · 23 kg
Overhead bag: 56 × 45 × 25 cm · 23 kg
Frequently asked
Do I need a prescription for liquid medicine on British Airways?
For quantities over 100 ml, bring a prescription or doctor's letter. Under 100 ml, medicine can simply go in your clear liquid bag with no paperwork.
Where should medication go on a British Airways flight?
In your cabin bag, within easy reach. Medicines you may need during the flight should never be checked into the hold.
More British Airways liquid topics
Sources
- BA hand baggage allowance — checked 2026-06-01