Resolved Question: Can someone be prescribed antidepressants for?

Insomnia? My friend saw this guy who takes drugs, he said, his insomnia. I do not believe this person, so I use the Google search of drugs, which is a anti-depressants! If you have insomnia, a doctor's prescription sleeping pills will what? Why he will open anti-depressants? It is possible that he had insomnia, lying, but in fact he had depression diagnosis? I want to help my friend. I do not care whether he has depression, I am only concerned that he was lying to her.