caret icon Back to all discussions

Metformin side effect - diarrhea- how long?

I am taking Metformin 1500 MG a day. At least once a day I have diarrhea. Some days 2 or 3 times. I understand this is a "temporary " side effect of Metformin but at what point do I insist on a change in medication. All this diarrhea can not be good for intestines/colon. It's been 30 days since I started. Can anyone quantify for me when to throw in the towel? 30, 60, 90 days?

PS I had been on 1000 MG but increased on Monday to 1500. My BS # was 134 today which was very welcome after weeks of 140 -180.


  1. , thanks for posting your question. I can understand why this would be such a bothersome side effect from your metformin. Unfortunately, I'm not able to give you a definitive answer as to when your diarrhea may subside. I encourage you to reach out to your doctor who prescribed the medication, and see if they have any feedback for you. More than likely, they will be able to give you a closer timeline and expectation of what taking the medication might look like for you because they are familiar with your history.


    Wishing you well, and please do keep us in the loop if you find an answer. We are always looking to learn from our community member's experiences.


    - Cody (Team Member)

    1. I want to thank-you for responding so quickly. Very much appreciated. I have my first FU with the Doctor Thursday so hopefully I will get an idea.

      Please read our rules before posting.