"i was prescribed this medication yesterday after struggling to sleep when my ambien became ineffective.  when i took it, i waited 1.5 hours to feel sleepy and i didn&#039;t.  i then took a 2nd pill (30mg total).  after 3 hours time it still hadn&#039;t worked for me.  i was in bed, ready to sleep, no real distractions.  i finally had to take ambien on top of it and then i felt a bit tired and struggled all night.  not sure if this is a medication that takes time to work, but it didn&#039;t touch me at all."