More serious vitamin B12 side effects may include the following: Allergic reactions, such as hives, trouble breathing, or swelling of the face, lips, tongue or throat
Carroll PV, Umpleby M, Alexander EL, Egel VA, Callison KV, Snksen PH, Russell-Jones DL
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Important Store unused equipment and medicine in a safe place, away from children and pets
Any suspected side effects from hydroxocobalamin injections should be reported via the MHRA Yellow Card scheme (available at yellowcard.mhra.gov.uk)
Obtaining a B12 Injection Prescription To get a vitamin B12 injection prescription, you need to see a doctor