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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Are constipation and bloating a side effect of Bactrim?

I was diagnosed early Wednesday morning with a kidney infection and was given Bactrim. As I had C Diffe from antibiotics in 2013 of course I worry. But with this drug or this infection I am incredibly bloated and haven t had a bowel movement since Tuesday. Very unusual for me. Is this a side effect of these generic Bactrim meds.
Tue, 26 Mar 2019
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Internal Medicine Specialist 's  Response

Pseudomembranous enterocolitis can occur with Bactrim (Trimethoprim/Sulfamethoxazole) due to an overgrowth of Clostridium difficile (C difficile). However Bactrim is also used for infectious diarrhea (shigellosis enteritis) or traveller's diarrhea. The drug might have treated subtle colonic infection as well.

Hope I have answered your query. Let me know if I can assist you further.

Dr. Tushar Kanti Biswas,
Internal Medicine Specialist
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