Restoril is another brand name for the medication temazepam. Like Ambien and Halcion, Restoril is a sedative-hypnotic medication primarily used to treat insomnia. It belongs to the benzodiazepine class of drugs, which work by enhancing the effects of GABA to promote relaxation and sleep. Restoril is typically taken orally, and its effects can be felt within 30 minutes to an hour of taking it. It has a longer half-life compared to Halcion, ranging from 8-20 hours. This longer duration of action makes Restoril more effective for maintaining sleep throughout the night. However, it also increases the risk of residual sedation and impaired cognitive function the next day.