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A 25-year-old female asked:

Can xifaxan (rifaximin) & probiotics cause your stool to smell "chemically"? it almost smells like motor oil. stool looks brownish/orange. no visible blood. stool culture/o&p = neg.

2 doctor answers2 doctors weighed in
Dr. Mark Scheier
Family Medicine 44 years experience
No: These drugs are used for liver failure. Liver failure, can cause smelling stools, especially with high ammonia levels.
Dr. Martin Raff
Infectious Disease 56 years experience
Stools: The color, odor, consistency, etc. Of stool can be changed by anything taken orally. This is usually dietary materials, but drugs also possible. Not probiotics which generally make stools like those of breastfed babies and are not malodorous.

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Last updated Jul 8, 2018

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