All medications have chemicals which can either directly or indirectly cause harm to the body. This actually includes sleeping pills. Yes, you heard before that getting addicted to them proves to be deadly. But the truth is that taking it just once can also be bad for your body. The result will actually become completely visible to you. You really do not want to run a test on that, for its consequence will not only be seen by you, but also by others.  Read The Most Visible Side Effect of Sleeping Pills to know everything in details.