which needle for b12 injection B12 Injection Cost Guide: Prices, Fees & Savings Tips 2026 The next time you give

When researchers actually tried to shut this leak off the results werent subtle

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

It depends on whether you are actually low

Overall, B-12 injections are relatively safe with no significant side effects, but below are unknown incidents that may occur

But its a good idea to see a healthcare provider if a bruise: If medication is the likely cause, your doctor may explore other options