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) B12 injections work quickly
& Xiao, D
Track your cycle and discuss significant changes lasting more than 3 months with your gynecologist
[DOI] [PubMed] [Google Scholar] Davies J
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The unit measurement exists to help patients deliver precise doses without needing to calculate fractions of a milliliter, making self-injection safer and more reliable