I take a number of medication, one is gabapentin, for restless leg syndrome, & back pain. I have degenerative spinal stenosis,, fibromyalgia, heart problems, etc, but I have trouble with breathing & heart palpitation & weakness from the waist down. I wonder if it is the gabapentin causing this. I take xanax also for anxiety, & cymbalta for depression & fibromyalgia. I want something I won't gain weight because of taking it, but I have run out of suggestions.. Anyone got help for me?