Originally Posted by
RichardInSF
In China they sold me something called "Zopiclone" cheaply (Lunesta is "eszopiclone"), but when I looked it up online, the side effects listing scared me away from trying it.
Eszopiclone is the active stereoisomer of zopiclone. It exists as a separate drug from zopiclone because of patent reasons; there's no motivation to go through the FDA approval process for an off-patent drug.
AFAIK the side effect profile of the two is the same.