ibromyalgia
"I was in a clinical study for Xyrem for fibromyalgia.  I hated having to wake up to take the 2nd dose.  Was afraid of being addicted to the medicine.  It did not significantly lessen my pain.  I had suffered from sleeping problems for years and was really afraid that I would have horrific problems sleeping once I stopped the medicine.  But to my surprise it seemed to have forced my body to break the insomnia habit.  I haven't had sleeping problems in the year since I quit the drug.  Used to wake at 3 am most mornings and not be able to get back to sleep or have trouble getting to sleep.  Now I sleep from 11 to 6 usually - no problem.  So I am grateful for that."