What Can Be Done When Insomnia And Depression Are Worsening Despite Taking Alprazolam And Ambien?

Hi my 80 years old father is a heart patient and an insomniac and took alprazolam for years. But now it’s not working and he is taking it with ambien 10 mg. It’s still not working and he sleeps only 4-5 hours the whole day. He is not feeling well and is depressed and getting worse