vitamin b12 or b-complex injections Phoenix B Complex Injection, 100 ml Vitamin B Complex Fortified Injection is for use as a supplemental source of B complex vitamins for cattle Vitamin B Complex: Package Insert
Description
Vitamin B12 injections are generally safe when administered by qualified professionals

This small bleb is totally safe but the skin has a much greater density of nerve fibrils than one finds in the adipose tissue of the buttocks
This is particularly true when the treatment approach involves dietary adjustments, like increasing the intake of B12-rich foods or oral supplements

Bleeding: Minimal bleeding is expected