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Vitamin B-12 Injection
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Vitamin B-12 Injection Side Effects

vitamin b12 vial, cyanocobalamin
Vitamin B-12 injection | cyanocobalamin side effects and adverse reactions include the following:
  • Pain or redness at injection site
  • Low potassium levels in the blood
  • Very rarely: chest pain, weakness, vision changes, problems speaking
  • Very rarely: Allergic reaction
If you or a loved one has experienced a Vitamin-B-12 injection side effect that we’ve listed or if you have more to share about this drug, fill out our report a bad drug form and tell us about it.