Calpol comes in 100ml bottles so you should be fine although we have bought it at airport last few times to save messing. You can take sealed ready made cartons through no problem just tell them at security as they wk scan the separately.

In 2026, you can generally take a bottle of Calpol (liquid paracetamol) in your hand luggage, even if the bottle exceeds the traditional 100ml limit, as it is classified as a necessary liquid medication. Under current aviation security standards, essential liquid medicines required for the duration of a trip are exempt from the standard liquid restrictions. However, you must be prepared to present the bottle for separate screening at the security checkpoint. While a prescription is not typically required for over-the-counter Calpol, having a doctor’s note or the original packaging can speed up the process. It is worth noting that at advanced airports like London Heathrow or Amsterdam Schiphol, which have fully implemented CT 3D scanners in 2026, you may not even need to remove the bottle from your bag, though declaring it to security officers remains a best practice to avoid any boarding delays.