Restoril (temazepam) is a medication commonly prescribed for the short-term treatment of insomnia, particularly for individuals who have difficulty falling or staying asleep. It belongs to the benzodiazepine class of drugs, which work by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain. This neurotransmitter has a calming effect, helping to relax the central nervous system and induce sleep.