I was diagnosed withh diverticulosis twentyfive years ago. I have had a couple of attacks for which I have been given the Cipro and the Metronidazole. I am on this med now for 6 days and my stool has changed to soft mushy dark tar like. When I eat something I go to the bathroom at least 2 to three times. Each time I go it is the dark tar like stool which has no odor. . I do have an appt. with the Dro tomorrow morning. I am concerned because my mother died of Pancreatic Cancer.