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

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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

Who Needs Higher Doses of Vitamin B12

(10) J Tamunopriye and O O Abiola (2014) Human chorionic gonadotrophin (HCG) stimulation test and testosterone response in children with micropenis Pediatric Endocrinology Reviews, 2014 Sep, Volume 12 (Issue 1), Pages 42-5