Drake Shearer It's pretty simple. If they give you b12 injections, and your b12 doesn't go up. It didn't work and you should probably try something Instagram Thinking of a B12 injection for wellness? Here's what you need to know Vitamin B12 injections are prescription only medications and for good reason. They're intended to treat a clinically Vitamin B Complex: Package Insert Prescribing Information What is Vitamin B12 , Vitamin B12 is needed to form red blood cells and DNA. It is also a key player in the function and development of brain and nerve cells. Vitamin B12 binds to the protein in the