text: Restoril is the brand name for temazepam. It is a sleeping pill. \n\nWhen used for treatment of insomnia, the usual dose is 7.5mg to 15mg taken at bedtime.\n\nAlthough not usually fatal when taken alone, a temazepam overdose is considered a medical emergency and generally requires the immediate attention of medical personnel.\nThe lethal dose is not known, but supposed to be over 500 mg. A case of a person surviving after taking 300 mg is known.