A prospective, randomized, controlled clinical trial compared metronidazole 250 mg orally four times daily with vancomycin 500 mg orally four times daily, each for 10-day courses. [43] Fewer ...

Metronidazole oral tablets and capsules have ... as a single dose or two divided doses of 1 g each on a single day, or 250 mg three times per day for 7 days. The kidneys and liver of older adults ...