Ambien (Stilnox, Zolpidem) is in a class of drugs called
sedative/hypnotics or sleep medicines. Stilnox (the brandname used for
Ambien outside the US) affects chemicals in your brain that may become
unbalanced and cause insomnia.
Ambien (Stilnox, Zolpidem) induces sleep
and causes relaxation. It is used to treat sleep disorders such as
trouble falling asleep, waking up many times during the night, or waking
up too early in the morning.