You never know what will happen on your trips, so ensure that you take adequate medication with you if necessary. Once good things is to take a copy of your prescriptions with you in case you misplace your medicine and need to get it refilled.
Always take some kind of medication for a headache with you as well. One thing to remember too is that if you travel internationally, you may not be able to find your normal headache medication. Usually you can tell the pharmacist what you need and they will provide you with an equivalent. Please read and understand the dosage.
Oh, don't pack your medication in your checked luggage.