I can report a similar story with B-12 and sciatica. After I started B-12 injections my sciatica improved. I order pre-filled syringes from Wellness pharmacy Inc oout of Birmingham, Alabama. They are about $85.00 for 20 pre filled syringes including shipping.. They contain 25mg/ml of methylB12. It is the only form of B-12 that passes the blood brain barrier except for sub-linguals. Some take it every other day, I take it every day. You need a prescription. It also improves my brain function and mood.