Avoid leaning or tilting your head to one side, since your neck muscles contract when you're in these positions. Avoid high-Altitude headaches. You may help avoid a headache by taking 3,000 to 5,000 milligrams of Vitamin C the day before you leave and one each day when visiting. When caffeine helps a headache. Having a cup of coffee or tea with your aspirin provides better relief than aspirin alone.
Caffeine can be very helpful, because it constricts blood vessels.
Most aspirin products have a fair amount of caffeine in them. And avoid using more than two aspirin tablets a day. And if you're a coffee drinker during the week, don't stop drinking it on weekends or you'll risk a real head splitter. That's because even one day of skipping is enough to trigger a caffeine withdrawal headache. How to fly without headache.