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Can Vitamin B-12 Injection Cause Diarrhea?

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Posted on Fri, 22 Jan 2016
Question: Can B12 shots cause diarrhea
YYYY@YYYY
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Answered by Dr. Bonnie Berger-Durnbaugh (28 minutes later)
Brief Answer:
Yes Vitamin B 12 can cause diarrhea.

Detailed Answer:
Hello and welcome,

Diarrhea is not a common side effect of taking supplemental Vitamin B 12, but it is a reported side effect, so it is known to happen.

If you noticed that diarrhea started after starting shots, and you didn't start any other new medication or food around the same time, then it is likely that the diarrhea is attributable to the Vitamin B12.

I encourage you to talk with the prescribing doctor about this problem and let humor her know whether the diarrhea is severe or mild and manageable, and also how long it lasts after each shot.

I hope this information helps.
Note: For more detailed guidance, please consult an Internal Medicine Specialist, with your latest reports. Click here..
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Bonnie Berger-Durnbaugh

General & Family Physician

Practicing since :1991

Answered : 3133 Questions

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Can Vitamin B-12 Injection Cause Diarrhea?

Brief Answer: Yes Vitamin B 12 can cause diarrhea. Detailed Answer: Hello and welcome, Diarrhea is not a common side effect of taking supplemental Vitamin B 12, but it is a reported side effect, so it is known to happen. If you noticed that diarrhea started after starting shots, and you didn't start any other new medication or food around the same time, then it is likely that the diarrhea is attributable to the Vitamin B12. I encourage you to talk with the prescribing doctor about this problem and let humor her know whether the diarrhea is severe or mild and manageable, and also how long it lasts after each shot. I hope this information helps.