My son is calling. he is 25. He said he has a bad head ache, is vomiting , and has chills. He is a little achy. He lives in another state. I told him he might have flu or gastroenteritis ...to chew on ice chips, to sleep....there is nothing much he can do I think.....I am not sure he can hold motrine or Tylenol down...please advise what to do,,,,