"it&#039;s very expensive for it not to be effective. my insurance paid $400 &amp; my copay was $100. pharmacy said it was effective which within 3 days nothing happen. it seems i stayed up longer. took it at 9 pm. supposedly you are to take it 30 minutes before bedtime. i stayed up till 4 am &amp; 5 am. i took advil pm since i had to get some sleep. it was more effective then this very expensive medication that i can&#039;t get a refund. do not buy it unless your insurance covers it all. maybe asked for a sample before buying a month supply."