I take a medication for sleep called Elavil. It is an old tricyclic AD, not much in use as an AD, but is in use in small, non-AD doses, for muscle relaxation and consequently better sleep, for migraine prevention, for chronic pain relief. very cheap without insurance - need a prescription from a doctor. Trying searching the web to see if anyone has used it for cramps. The generic name is Amitriptyline.