We just learned that our 13 year old daughter suffered from cyclic vomiting syndrome for the past 4 years. in the beginning, we were told she had headacheless migraines and to try giving her an antihistamine. we found that giving her a benadryl each night for the week she would usually be ill helped to prevent an episode. some times it would surprise us and when she would begin the severe abdominal pain she could take dimetap and prevent the episode as well. If she began throwing up then nothing would stop it. Has anyone found this to help?