I think if you keep in mind that everyone is different and drugs, OTC and otherwise, affect people differently, you should be ok. When the specialist showed my son the list of OTC drugs that were considered harmful if used regularly, it scared him and me, too. For ex: Benadryl makes most people drowsy but it wires me for sound. I become a nervous wreck if I take it and even cry but others swear by it. Take what we all say w/a grain of salt and visit an allergist. That's probably your best bet. There is no hard and fast rule and certainly no reason to insist on our way. One person's medicine is another person's poison.