List of products in the National Drug Code with proprietary name . This medication is used to treat sleeplessness (insomnia). It helps you fall asleep faster so you can get a full night's rest. Sleep is important for your ability to function, think clearly, and remain alert. Lack of sleep can cause problems such as depression, heart disease and accidents. Getting enough sleep allows your mind and body to repair itself and increases your energy throughout the day. Ramelteon works like a natural substance called melatonin that is produced by your body. It helps regulate your sleep-wake cycle (circadian rhythm).