@narelled23 Thanks for letting me know. I posted 2 links, and they have somehow run together so they don't work. I will ask a moderator to fix this. Here are the links I tried to post.
https://www.mayoclinic.org/diseases-conditions/hiatal-hernia/symptoms-causes/syc-20373379
and this story from the Mayo News Network
https://newsnetwork.mayoclinic.org/discussion/tuesday-q-a-gerd-a-more-severe-form-of-acid-reflux/
I have also done allergy shots which help and then you don't need anti-histamines. I just don't like getting a shot, so I can take an anti-histamine, but I should be doing the injections. I know some anti-histamines can cause drowsiness and dry mouth. You can always look up a specific drug to see what side effects it may have. If you use the word "ototoxic" in your search, you can find out if it causes damage to hearing.