Occasionally, mild soreness or redness may occur at the injection site
Patients should seek emergency medical help (call 999) if they experience: Difficulty breathing, wheezing, or throat tightness Swelling of the face, lips, tongue, or throat (angioedema) Widespread urticarial rash (hives) developing rapidly Dizziness, fainting, or rapid heartbeat suggesting anaphylaxis These symptoms typically occur within minutes to hours of administration, most commonly with injectable preparations
Although vitamin B12 is generally considered safe even in higher amounts, it is still important to use this medication as prescribed to avoid unnecessary complications
Dispose of needles and syringes in a sharps container
Injections bypass the gut, and for these patients treatment is often a long-term maintenance strategy guided by their provider