where to inject b12 subcutaneously Instruction Guide for Intramuscular (IM) Self-injection of Methylcobalamin 1mg/5mg B12 vitamin Store A Manual
Description
Common injectable anesthetics are lidocaine, bupivacaine, and mepivacaine

Its also associated with side effects

doi:10.1210/endo.142.12.8522 Heffernan MA, Thorburn AW, Fam B, et al

this effect may be due to interference with erythrocyte maturation

Sequelae of untreated vitamin B 12 deficiency includes not only permanent neurological symptoms, but also osteoporosis and cardiovascular disease
