Restoril 15mg is a medication primarily used to treat insomnia, helping individuals who have trouble falling asleep or staying asleep. It belongs to a class of drugs known as benzodiazepines, which work by calming the central nervous system. Restoril increases the activity of a neurotransmitter called gamma-aminobutyric acid (GABA), which has a sedative effect on the brain, helping to promote relaxation and sleep. By doing so, it can help individuals with short-term sleep difficulties get a better night's rest. However, due to its sedative properties, it is usually prescribed for short-term use to avoid dependence or other long-term side effects.