Related name(s): Suvorexant

Suvorexant is used treat insomnia (difficulty falling asleep or staying asleep). Suvorexant is in a class of medications called orexin receptor antagonists. It works by blocking the action of a certain natural substance in the brain that causes wakefulness.

Source: U.S National Library of Medicine (MedlinePlus)
For more detailed information on Belsomra vist U.S. National Library of Medicine (MedlinePlus)