I had a prescription for a 30 day supply with refills. I faithfully took this to cope with my idiopathic neuropathy for the initial 30 days and refilled the prescription. I took the medicine for approximately 50 days straight. I did not think it was truly working for me and stopped. Two weeks later I was in a lot of pain in my feet and legs. I decided it was indeed working to alleviate (not eliminate) my pain. I took the few remaining pills and became convinced it was effective. I attempted to refill the prescription and I'm now caught in the "prior authorization required dance" in order to obtain a refill. Its frustrating and baffling. The prior authorization hurdle was overcome to fill it initially and obtain the 1st refill. I'm now in limbo as I await further word. I know it was effective in diminishing the pain level. I was at a 3-5 range with the medication; without it is a 5-7.