"ambien itself is fantastic, never missed a night of sleep and 8 hours a night. on the other hand, this generic zolpidem tartrate is absolute garbage. i&#039;ve tried for a very, very long time to see if it would work and it never has. i noticed it slowly stopped working when i picked up the new prescription for what i was told would be ambien but was the zolpidem. i do not only barely sleep with it, i do not sleep at all when i take it. keeps me up until the next night, makes me feel mildly high without sleeping, and they just do not work at all. i&#039;ve read so many reviews in the past hour or so sharing the same experience. cheaper is not better when its prescription meds. someone should tell the moronic big pharma companies."