Dad's Side Effects

My father is having some side affects that we haven't been able to resolve. The heartburn after eating a few bites even when using Pepcid, burning from nose and sore burning buttocks from diarrhea. He was recently discharged from the hospital after 5 days due to dehydration and not eating because he developed shingles in his mouth and throat. I would appreciate anyone's help. I have been reading your blogs since he has been diagnosed and I appreciate your courage and knowledge.
Thank you.