Depends on what you are allergic to - if your allergies are to drugs of any kind, be sure to check with your doctor about what kind of medications you can use!! Wristbands work for some people, but not all (me included), so I swear by Bonine, available OTC

- again, with the caution to see your doctor first. And bring along any antihistamines or other allergy meds you normally take, of course.