Doxycycline is a very broad spectrum antibiotic. This can change the bacterial flora in your colon and also change the color of the stool along with the function of the colon. It is a good idea to take a probiotic daily to help rebalance the bacterial flora in your bowel.
Answered 6/16/2021
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Agree with Dr Ellis. Additionally, I don’t recommend PeptoBismol. Please contact your doctor if your stools are pure black or if you see blood.
Answered 6/16/2021
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