Sleep Disorders - is still nox a sleeping pills?

Yes, it is but should only be used as prescribed by a doctor.

Stilnox (zolpidem) is a sedative, also called a hypnotic. It affects chemicals in your brain that may become unbalanced and cause sleep problems (insomnia).

Zolpidem is used to treat insomnia. The immediate-release form of zolpidem is Ambien, which is used to help you fall asleep. The extended-release form of zolpidem is Ambien CR, which has a first layer that dissolves quickly to help you fall asleep, and a second layer that dissolves slowly to help you stay asleep.

http://www.drugs.com/zolpidem.html