Zunestar Tablet is one of a class of drugs known as sedative-hypnotics. It helps you fall asleep by lowering the activity of nerve cells in your brain. Zunestar 3 mg medication is taken by mouth, either. The digestive fluids in the stomach break down the drug after it is ingested, allowing it to flow into the circulation. Your blood then transports the drug to other places of your body where it is most effective.