common side effects of vitamin b12 injections Understanding the Shot: Benefits, Risks, and Dosage Guide Does the Vitamin B12 Shot

These extremely rare side effects include: Reactive thrombocytosis during the first week of use in megaloblastic anaemia Hypersensitivity reactions including: rash, itching, exanthema, antibodies to HYDR0XOCOBALAMIN-transcobalamin II Anaphylaxis Hypokalaemia Headache, paraesthesia, tremor Irregular heartbeat (arrhythmias secondary to hypokalaemia) Nausea Vomiting Diarrhoea Fever, chills, hot flushes, dizziness, malaise, pain and / or swelling at the injection site Acne Abnormal colouration of the urine (chromaturia) What should you not do after a B12 shot

For people with B12 deficiencies, which can result in symptoms like fatigue, weakness, or even cognitive issues, B12 shots can provide a much-needed energy boost

Who Needs Higher Doses of Vitamin B12

If the infusion lasts less than 16 minutes, you must bill the service as an intravenous push instead