Gabapentin
"I've had Complex regional pain syndrome (CRPS) in my ankle/foot for about 9 yrs now work injury. 1st thing tried was cortizone shots directly in my ankle then after diagnosis I was given ext release morphine an vicodin for break through pain. Due to one of my more unpleasant an turned out dangerous side effects I have which is the random feeling of lots of ants or spiders running all over my Foot & Leg biting me It feels so real that twice I ignored the feeling an found I was really being attacked by dozens of ants Doc decided to add Gabapentin and even thou that side effect has tapered off I had no real improvement I stopped taking it after 4 months. For about 5 yrs now I've been taking exalgo, dilaudid, flexaril, & cymbalta this combo has helped the most for me so far"