Asking your doctor would be the wisest thing. Diphenhydramine(benadryl) is a good one to use but can make people either drowsy or hyper. Chlorpheniramine(ChlorTabs generic) works great and doesn't cause drowsiness. One pill every 4-6 hours works well. Loratidine(Claritin generic) is also a really good one, as is Zyrtec(no generic, is expensive).

All work well!