Restoril 30 mg refers to the 30 milligram dosage of temazepam, a prescription medication in the benzodiazepine class used to treat symptoms of a sleeping disorder in patients. Restoril generic is a useful medication for adults who need help getting to sleep, but it can also be misused and abused. According to the US Drug Enforcement Administration (DEA), benzodiazepines are depressants that slow down the central nervous system to induce calmness and relaxation, help to reduce anxiety and muscle tension, and minimize seizures.