This is the protocol for a review and there is no abstract. The objectives are as follows:
To assess whether opioid analgesics have a role in the control of dyspnoea in adults (aged 18 and over) with chronic heart failure. If the opioid reduces breathlessness in heart failure, this could potentially markedly improve the quality of life of people with this problem, as breathlessness is a major adverse symptom in heart failure. What is not entirely clear is whether opioids really do reduce breathlessness in heart failure and, if so, by how much and is it is enough to impact on quality of life?