opioidsOpioids are substances that doctors may prescribe as medicine to treat severe pain. Related web pages: Treating people who have idiopathic hypersomnia or narcolepsyMedicines for idiopathic hypersomnia and narcolepsyPreparing for anesthesia, hospital stays, and medical emergenciesGlossaryMake an Emergency Anesthesia/Hospitalization Plan Now!<< Back to glossary index