Vitamin B12 injections are generally safe, but some individuals may experience side effects, including: Pain or redness at the injection site Mild diarrhea Itching Nausea or vomiting Dizziness or headaches Hot flashes In rare cases, more serious reactions, such as allergic responses (rash, swelling, trouble breathing), can occur
After that, lifelong monthly injections become the gold standard
doi: 10.1016/j.ejphar.2007.05.072
Common solvents include bacteriostatic water, sterile saline, acidic buffers, and selected analytical-grade organic solvents
Standard dosing suggests one capsule twice daily on an empty stomach
Another technique involves locating the top outside corner of the kneecap and moving upward along the outside of the thigh to find the injection site