Other than the pills or liquid medicine, it is super important that you take any documentation like doctors note and prescription *with you. Ensure you *pack extra in case if an emergency like a flight cancellation, to ensure you don’t miss a dose which you may need to ask your GP to alter your prescription amount for. You may need a personal license, if carrying controlled medicines, which you will need to apply to your Home Office for, but talk to your GP beforehand.
Furthermore, write down all the medication you have to take with you and the translation as this will help you in the event that you do run out or loose your prescription. If you take this with you, you will be able to make communication easier with the pharmacist in the local pharmacy.