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This is Dr. David
cymbalta can cause symptoms of diarrhea or constipation
your symptoms could also be due to IBS irritable bowel syndrome.
I would not stop your medications at this point.
I would see your doctor to discuss your GI symptoms
you may benefit from adding a probiotic into your diet.
if the cymbalta continues to cause GI side effects, your doctors might switch you to Savella to treat your fibromalgia.
you may have to keep a food diary of what you eat to see what foods could be irritating your system.
how old are you?
with new GI bowel syndrome, you may need a colonoscopy to look inside of your colon.
let me know if you have other questions.