Can taking clindamycin and metronidazole for tooth infection lead to dark brown stools?
Patient: I finished a course of antiobiotics clyndamiacin 300mg. 4x/day and metronidazole 500 mg 4x/day for 7 days for a tooth infection.  I now have very dark or brown stools that are very loose.  I have also been taking a probiotic during this time.  Is this something I should be worried about. I noticed the stool get progressively darker as the week went on Doctor: Hello and welcome.Thanks for sharing your concern.Loose stools and mild darker stool is expected with such antibiotic.Therefore do not worry and wait for two more days.Loose stools should stop once your antibiotic course gets over.Therefore if the symptoms persists then you can see your physician for further investigation regarding this.until then do take good care of yourself.Thanks.Take care