My dad has COPD likely caused from agent orange inhalation during the Vietnam War. His muscles combated it for about 30 years up until about 6 years ago. He has battled this disorder without much community outreach, and it has worsened and it's time we reach out to others. Here's my question - he has massive stomach issues every so often, including diarrhea. He sleeps all the time as well, just gets utterly exhausted. I think some of this may have to do with the antibiotics he is on - but does anyone else have experience with these issues as well?