I take a little more than 1/4 pill of Zolpidem ER 12.5 mg before bed. It helps me sleep for about 5 hours. I keep 1/4 pill next to the bed with water. When I waked up I chew the 1/4 pill and fall back to sleep quickly. It last about 2.5 to 3 hours. So now I am finally getting 8hrs of sleep. Works pretty good.