in guideline Opioid Fentanyl MESH:D005283 A potent narcotic analgesic, abuse of which leads to habituation or addiction. It is primarily a mu-opioid agonist. Fentanyl is also used as an adjunct to general anesthetics, and as an anesthetic for induction and maintenance. SCDO:0001321 Sufficient Duragesic N-phenyl-N-[1-(2-phenylethyl)piperidin-4-yl]propanamide Phentanyl Durogesic Were these specific synonyms selected form the long list in the description source because of specific relevance to SCD? Recommendations for the Management of Sickle Cell Disease in South Africa Standards for Clinical Care of Adults with Sickle Cell Disease in the UK Sickle Cell Disease: The Clinical Care Guidelines of the Sickle Cell Unit