Take probiotics (which some yogurts and milks products have included). It is ok to take them together with the antibiotics.
Avoid ibuprofen and milk of magnesia
unless absolutely necessary.
Cipro and flagyl can cause some diarrhea, and also some metallic taste
in the mouth, but side effects go away as soon as you stop those meds.
Make sure you get a colonoscopy
in the next few weeks if you haven't had a recent one (within the past year or two). Sometimes cancer or inflammatory bowel disease
is confused with "diverticulitis".