What are substances that induce sleep?

Substances that induce sleep are known as sedatives or hypnotics. Common examples include prescription medications like benzodiazepines (e.g., diazepam, lorazepam) and non-benzodiazepine sleep aids (e.g., zolpidem). Additionally, natural substances such as melatonin, valerian root, and chamomile are often used to promote sleep. These substances work by calming the nervous system, reducing anxiety, or directly affecting sleep cycles.