feel ill after b12 injection What happens if you inject wrong? Why Do I Feel Worse

Importantly, lipotropic combination injections are generally unlicensed in the UK and, if used, must be supplied as MHRA-regulated 'specials' on prescription from licensed manufacturers or importers

But you might need them more often if you have more serious symptoms, like nerve problems, or your pernicious anemia is serious

[Accessed on 4th November 2022] Useful Diagnostic Tests Complete blood count MMA test

Serious side effects are rare

Definition and Clinical Significance Anesthesia of the skin is when you lose or feel less sensation in your skin

these usually present in infancy, although neurologic and psychiatric presentations of cobalamin C defect have been described in adolescents and adults (216