insomnia
"I've been on Ambien CR (Zolpidem XR) for years. It always worked. Until it didn't. I have insomnia because of Fibromyalgia and a bad back which wakes me every time I turn over. But it loses its efficacy after 6-7 months. Doctor switched me to Lunesta and it did nothing. It was as if I took a placebo. Went back to the Zolpidem XR but I'm now back to having built up a tolerance again. Doc put me on Temazepam but it's like nothing too. It stinks not being able to sleep or stay asleep."