@avmcbellar Thank you and @rwinney Good advise. I will check with the pharmacist and doctor. I don't know why I did not ask for a quick lesson so I can do this myself. Let me ask anyone who is low on B12 and injecting. My primary care doctor did not suggest B12 injections and my blood work showed normal levels. The neurologist prescribed the B12 without doing another blood test. He said that although the number is normal I may not be metabolizing or getting into my system because I had surgery on my stomach 9 years ago. I had a nisson funtalmentation? because my esophagus was being harmed by stomach acid. I do know this to be true, but didn't ask if that were going on wouldn't my B12 be under normal amount.