• Passengers are allowed to take essential medicines sufficient for their trip. Amounts under 100ml should be placed in a transparent, relsealable plastic bag, with any other liquids. If the container is larger than 100ml it should be presented at security for x-ray inspection. There is no limit on the amount but you may be asked to verify the liquid by tasting, or provide proof such as a doctor's letter.

• Passengers may carry non-prescription tablets (eg paracetamol), but as with all other medicines they should be properly marked with a professionally printed label identifying the medication and manufacturer's name or pharmaceutical label.

• Any other medical item that you may need during your flight – including insulin and needles, asthma inhalers, Epi Pen, angina sprays etc – can be carried, but only the amount necessary for your trip. The rest should be put in your hold baggage.

• If you are concerned about the effect of the temperature in the aircraft hold on your medicine, you should speak to your airline directly.

• Items such as blood pressure monitors can be carried in hand baggage – as long as they fit within the size limits.

• Spare contact lenses can be carried in hand baggage – but only what you need during the journey and the packets must be sealed. The rest should be in your hold baggage. And any contact lens solution must be in a 100ml container.

• Homeopathic medicines will be subject to x-ray screening. Although we appreciate your concerns, the Homeopathic Society of Great Britain cannot substantiate any impact on the medicines. However, should you be concerned please raise this with our officers at security.