Conversation so far:
when did ambien come out on the market
Zolpidem was approved in the US in 1992 under the brand name Ambien. It became available as a generic medication in 2007
is zolpidem safe for older people
In 2015, the American Geriatrics Society said that zolpidem met the Beers criteria and should be avoided in older people due to its risks compared with its benefits

Question: what is the criteria
Self-contained rewrite: what is the beers criteria