difference between b12 injections and sublingual Should You Use Over Capsules & Shots? Oral vitamin B12 versus intramuscular
Description
After loading, transition to maintenance dosing of 1000 mcg every 1 to 4 weeks depending on response and follow-up testing

Following this, apply a heavy layer of cream, as thick as icing on a cake, to the same area

Common causes include herniated or bulging lumbar discs (the most frequent cause), spinal stenosis, degenerative disc disease, piriformis syndrome, and spondylolisthesis

It's like day 4 since he took it
