I m a female, 70 years, caught a virus, took antibiotics, lost my cat suddenly, all in the time frame of 3 days, and came down with diarrhea, mucus and some blood, and just watery and cant get rid of. the dr. put me on methronidazole, 250 mg. every 8 days. the mucus and blood has stopped, still got 4 days of pills left. I still have some looseness but nothing like before.