Describe the mechanism of action of fentanyl in relation to its administration to Lucy.

Case Study DetailsLucy is a 19 year old university student. She has been admitted to hospital with a six (6) day history of lower right quadrant abdominal cramping pain increasing with intensity, diarrhoea with blood, anorexia, fatigue, nausea and episodes of vomiting. Lucy states that she was diagnosed with Crohn’s disease at age 15. She has had two previous hospital admissions for acute exacerbations of Crohn’s disease with clinical manifestations of diarrhoea, abdominal pain and vomiting. Her Crohn’s disease has been managed with a combination of diet, medication and medical monitoring. Remission of her Crohn’s disease was maintained by oral mesalazine (Mesasal). Lucy currently rates her pain as 9/10.