I have trouble sleeping too. My wife is a deep sleeper, so I used her as a model with NBG. I found it worked...but only to make me want to SLEEP IN everyday. Did not prevent me from waking up through the night.
I went to a sleep clinic, did a 2 night polysomnogram, and found out I have obstructive sleep apnea. That means I stop breathing 30 times per hour at night...very dangerous. SO now I need to learn to sleep with a machine that keeps my throat open, time for NBG again to help me with that.
Some insomnia are psychological, some are mechanical, and some are neurological. Certainly, try paraliminals, but also get her to see her doctor. Some of these conditions, like the one I have are life threatening.
Good luck, and Good night!
vitaman