A sleeping pill is a kind of light esthesias. The activities of central nervous system and the cerebrum fall by a sleeping pill and this takes us to the good sleeping situation.

But if we take too many sleeping pills,we cannnot sleep deeply.

As a result,we'll feel frustrated and exhausted when we wake up.

However if we continue to take it,we'll feel nauseated and dizzy and have a headache as a secondary effect. Therefore we have to be careful to take it.