The imidazopyridines are a class of sedative drugs related (in terms of their effect) to benzodiazepines. They include: Zolpidem (Ambien) Alpidem Saripidem Necopidem As they aren't chemically related to the benzodiazepines despite their similar effect, such drugs—as well as the pyrazolopyrimidines and cyclopyrrones—are sometimes grouped together and referred to as "nonbenzodiazepines".… (More on Imidazopyridine)