Topiramate
"I used Lyrica for six months and gained ten pounds a month. I have been off of the Lyrica since April and have only lost 15 pounds.  Recently started 100 mg of Topamax at bedtime and this is the answer! It actually will encourage the body to shed weight and have lost six pounds. Pain has gone from an intolerable 7 or 8 on the pain scale to about a 3.  This is what I have been praying for."