A member asked:

Can mucinex (guaifenesin) cause loose stools and rectal irritation? i had some minor diarrhea the day after taking it.

A doctor has provided 1 answer
Dr. John Chiu answered

Uncommon: Mucinex (guaifenesin) in large doses can irritate the stomach but not usually the lower bowel- but then any drug may potentially cause bowel symptoms in a few individuals. I suspect that the disease you are treating with Mucinex (guaifenesin) may be linked to the diarrhea.

Answered 4/20/2016

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