b12 for injection Cyanocobalamin 1000 mcg Multiple-Dose Vials 1mL x 25/Tray (Rx) Cyano is a form of vitamin B12 that is man Troy Vitamin B12 Injection 100ml
Description
If you have neurological symptoms (pins and needles, numbness, balance issues), severe fatigue, unexplained weight loss, chest pain, breathlessness, or symptoms that are worsening, you should seek medical assessment promptly.

Less common issues include itching or a rash that may signal a mild allergic reaction, or brief dizziness

Side effects are rare, but some individuals may experience mild pain at the injection site, allergic reactions, or dizziness

In other words, you may notice that you have more energy than you used to
