Belsomra is a sleep drug indicated for treating insomnia. This drug regulates sleep and the wake cycle. Insomnia is a disorder which causes difficulties in falling asleep or maintaining sleep. One with insomnia will show difficulties in sleeping, wakes up often especially at night, and might have troubles getting sleep. One also wakes up too early in the morning and feels tired upon waking up. Belsomra is a medication in a new class of drugs known as orexin receptor antagonists. These drugs target orexins, which are brain chemicals responsible for regulating the wake-sleep cycle in a person. Belsomra blocks the orexin receptor thus suppressing wakefulness. The orexin neuropeptide signals help in promoting wakefulness.