Prescriptions are reviewed by licensed providers and filled by independent pharmacies
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
Unopened freeze-dried vials can be kept at room temperature or in the refrigerator for short periods with no issue
Insufficient Folic Acid (Vitamin B9) is particularly concerning for pregnant women as it increases the risk of birth defects , such as spina bifida , in the developing foetus