texas hold em poker free Antihistamines can ease the symptoms of an allergy, but they won’t stop your allergy. So, if you’re allergic to something, you should try to avoid it. If your symptoms are very bad, see your GP because there may be other treatments that work. They may also suggest you see an allergy specialist. You may need to have a ‘skin prick test’ to check exactly what’s triggering your allergic reaction. If so, you’ll need to stop taking antihistamines several days before the test.