Paraldehyde is primarily used as a sedative and hypnotic medication. It was historically used to treat conditions such as insomnia and epilepsy, although its use has decreased over time due to the development of safer and more effective alternatives. Paraldehyde is known for its sedative effects, which can induce sleep and reduce anxiety. However, it is important to note that paraldehyde has a narrow therapeutic window and can be toxic if not administered properly. Therefore, its use is now limited and more closely monitored in clinical settings.