Zopiclone is a Z-drug. Z drugs are chemically distinct from benzodiazepines but also act on the same receptor (GABA receptor). Z-drugs are often prescribed instead of benzodiazepine hypnotics, although there is no evidence of differences in effectiveness and safety. In Hong Kong benzodiazepines are classified as dangerous drugs, but zopiclone is a P1S1S3 drug.

Answer: P1S1S3

Benzodiazepine vs Z drugs