2 doctors weighed in:

I have an unopened vial of cyanocobalamin that is a couple years expired. What would happen if I used it?

2 doctors weighed in
Dr. Edward Goldberg
Internal Medicine - Gastroenterology
1 doctor agrees

In brief: DO NOT USE IT

Never use expired medication for any purpose, especially injectable medications.

In brief: DO NOT USE IT

Never use expired medication for any purpose, especially injectable medications.
Dr. Edward Goldberg
Dr. Edward Goldberg
Thank
Get help from a real doctor now
Dr. Andrea Brand
Board Certified,
7M people helped
Continue
108,000 doctors available
Read more answers from doctors