urinary excretion of unchanged fentanyl is less than 10% 34. research hub

A randomised, double-blind, comparative clinical trial of the effectiveness and tolerability of fentanyl in continuous parenteral perfusion versus on-demand bolus of morphine for the treatment of refractory dyspnoea in patients hospitalised for acute dec

This study looks at how well two different pain relief medicines, fentanyl and morphine, work to help people with severe breathlessness in hospital due to heart failure. We want to see which one is better at making breathing easier and has fewer side effects.