Ambien - How long does it stays in your system? I have a drug test for work?

It takes approximately 11 hours for Ambien to be eliminated from your body. The half-life of Ambien is 2 hours. Generally it is considered that it takes 5.5 x half-life for a drug to be removed from the body, in that it is considered to no longer have a clinical effect. So for Ambien it would take approximately 11 hours (2 hours X 5.5) to be eliminated from your body.

Elimination of a drug varies from person to person due to factors like age, weight, other medications taken, or other medical conditions present, also kidney function, liver function etc. Therefore half-life is used as a guide, or an estimate of how long it may take for the drug to be removed from the body.