Side effects: Vitamin B12 injections may cause mild side effects such as pain, redness, or swelling at the injection site, feeling sick, diarrhoea, headache, dizziness, or hot flushes. Serious reactions are rare.
Additional precautions: Vitamin B12 injections are used to treat or prevent vitamin B12 deficiency and should be given based on clinical need. If you have symptoms such as extreme tiredness, weakness, numbness, tingling, or memory problems, it is important to seek proper assessment, as deficiency can have different causes and may need ongoing monitoring.
Risks caused by vitamin B12 deficiency: Vitamin B12 deficiency can cause tiredness, weakness, shortness of breath, headaches, memory problems, and nerve-related symptoms such as numbness or tingling. If left untreated, some neurological problems can become permanent.