insomnia
"My doctor (a psychopharmologist-one who specializes in medication) started telling me about Belsomra 2 years ago.  I have acute insomnia and no drug ever worked. He explained how Belsomra works in a completely different way than any other drug for sleep.  He also explained that it took 2 years to get FDA approval because Merck (the manufacturer) was NOT willing to have it classified as an addictive controlled substance when the fact that addiction is far less than on any other drug for sleep.  The FDA also had issues w/ the dose-studies show 15-20 mg is optimal.  Merck finally "caved" to both issues but if you're taking 5-10 and it isn't working, ask about increasing it.  Works for me!"