Belsomra
Also known as: 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 detailed information including dosage, side effects, and precautions:
View on MedlinePlus