Look again at information on zolpidem tartrate.
Boyle
J A
JA
D006801:Humans; D006993:Hypnotics and Sedatives / Q000009:adverse effects*; D008568:Memory / Q000187:drug effects; D011725:Pyridines / Q000009:adverse effects*; D000077334:Zolpidem
D006993:Hypnotics and Sedatives; D011725:Pyridines; D000077334:Zolpidem