[DanP]

I'm a idiopathic PNer in my 21st year. My pain is controlled by the Fentanyl Transdermal System patches (generic Duragesic), 125mcg/hr, changed every 2 days. I've been taking 1000mcg of Methylcobalamin B-12 daily for the past 5 years and have noticed no change in my other PN symptoms, i.e., numbness, tingling, stinging, etc., and the feeling that my feet and legs from the knee down is wrapped too tight with ace bandages.

So, I ask: how much Methylcobalamin B-12 should I take and why and on what evidence?