Restoril (temazepam) is a prescription benzodiazepine commonly used for the short-term treatment of insomnia. It works by slowing overactive brain activity, helping you fall asleep more easily and maintain deep, restorative sleep throughout the night. Because it can cause side effects like drowsiness, dizziness, or dependence, Restoril should always be taken exactly as prescribed under a healthcare provider’s supervision and never combined with alcohol, opioids, or other sedatives.