what size needle to use for vitamin b12 injection Cyanocobalamin Vitamin B12 Injection 1000 mcg — Mountainside Medical what size needle to use

Possible Side Effects Mild side effects of Vitamin B12 may include: ( 12 ) Mild pain, itching, or swelling at the injection site Temporary nausea or headache Mild diarrhea Hot flashes Vomiting These side effects do not affect all patients and are generally temporary and mild While rare, more serious side effects of Vitamin B12 injections can include ( 12 ): Irregular heartbeat Heart palpitations Hives or skin rash If you notice any severe reactions to a Vitamin B12 shot, contact a medical professional immediately

And at the heart of that rhythm is one critical, non-negotiable metric: its half-life

While some people receive a weekly injection, others might be given these injections more frequently or twice a week

Injectionsite discomfort (if used IM/SC)