A nonbenzodiazepine drug used to treat insomnia is zopisign 10mg. It slows down the central nervous system (CNS) so that the person can fall asleep and stay asleep since it is a central nervous system (CNS) depressant. It belongs to the group of drugs known as sedative-hypnotics. Within an hour of taking this particular medication, it usually begins to work. It works best if you take it right before night. The recommended duration of use for sleep medications is no more than two weeks, every night.