can you take b12 injection if b12 levels normal Cobalamin (vitamin B12) and Folate Deficiency Vitamin B12 Test: High Blood
Description
If you do lose some weight while receiving lipotropic injections, this is likely more due to other factors in your weight loss program like exercise and diet than to the shots alone

Anesth Prog 38 [PMC free article] [PubMed] 49.Berlin R, Berlin H, Brante G, Pilbrant (1978) Vitamin B12 body stores during oral and parenteral treatment of pernicious anaemia

33 Common neurological symptoms include myelopathy, neuropathy, and, less frequently, optic nerve atrophy

It would happen a few hours after an injection, but only once or twice, then it would return to normal