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As someone with a long-standing (more than ten years) spinal cord injury and perpetual neurogenic pain, I use or have used gabapentin (useless), prjegabalin (wonderful) and carbamazepine (great for trigeminal neuralgia that I also have). I was fascinated to read that they are drugs of abuse. I hate their 'mind altering' properties - they are sedatives and muscle relaxants and lower the tone in my limbs making my lack of mobility worse and more likely to end with a fall.
I could not survive without prjegabalin or I would need serious analgesia with fentanyl (patches), the only other drug that makes the pain liveable with.