I have osteoarthritis, FM, and carpal tunnel and have difficulty sleeping because of pain. I'm currently taking Zanaflex (4 mg), Darvocet, Vioxx, and Tylenol Arthritis at bedtime for pain - a cocktail which has worked fairly well - without that mental hangover - until recently. My doctor has just prescribed Neurontin (300 mg) to also be taken at bedtime for the additional pain. I'm confused about what I've read about this drug. It appears that it is FDA approved for seizures but that the manufacturer has been promoting it for off-lable uses. I am unable to find a listing of side effects or possible harmful reactions and/or interactions. Does anyone have any experience or knowledge about Neurontin (generic: Gabapentin)? I would appreciate your help!