Sleeping pills

Sleeping pills depress the central nervous system, so they feed into biochemical changes that occur in the brain, causing you to drop off to sleep. 

Unlike the brain circuitry,they wash the entire brain in these chemicals so there are other unwanted effects. They reduce the amount of time you spend in the deepest stages of sleep, and people get used to them and require increasing doses. It is better to look at the underlying cause of your sleep problem, which is often psychological.