The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
Side effects aren't common.
Vitamin B12 serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Serious allergic reaction: rash; trouble breathing; swelling of the lips, tongue, or face; vomiting
Source: DailyMed
The following Vitamin B12 side effects have also been reported
Side effects that you should report to your care team as soon as possible:
- Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
