I am on pantoprozole for acid reflux and once a week i get rotten egg smelling belches followed by diarrhea. could it be caused by medication or what?

Probiotics: These medicines have been reported to alter healthy flora in the colon and make one succeptible to overgrowth of c difficile infection. This could be the diarrhea. Probiotics and a diet in short chained fructoligosacchardies from bananas, garlic, asparagus and tomatoes and whole grain wheat products can help establish normal flora while on these medications.