Aspadol 150mg  is an opioid pain medication. An opioid is sometimes called a narcotic.Aspadol 150mg is a prescription medicine that is used to treat moderate to severe pain. It works in the brain to change how your body feels and responds to pain. Nausea, drowsiness, vomiting and dizziness are some of the side effects of this medicine. Aspadol Tablet reduces pain perception by preventing pain impulses from reaching the brain.