Breathlessness: Information for clinicians

Breathlessness is a very common distressing symptom in malignant and non-malignant disease. Up to 70% patients with cancer experience breathlessness in the 6 weeks prior to death, and this may be greater in lung cancer patients because of co-existent COPD. It is a frightening symptom for the patient and for those caring for them. There are specific resources for carers here.

Chronic breathlessness syndrome is breathlessness that persists despite optimal treatment of the underlying pathophysiology.

Consider reversibility if appropriate – antibiotics for infection, steroids for lymphangitis and SVC obstruction, furosemide for heart failure, drainage for pleural effusions.

Non–pharmacological interventions

Interventions of benefit in helping breathlessness
  • Keep room cool and open windows
  • A hand-held fan blowing towards the face
  • Pursed-lip breathing - inhale through nose with mouth closed, then exhale slowly through pursed lips for 4 to 6 seconds.
  • Sitting upright and lean forward with arms bracing a chair or knees
  • Visualisation and complementary therapy
  • Nutritional advice e.g. small frequent meals, easily chewed
  • Anxiety management
  • Social interaction eg Breatheasy groups

Medicines that help Breathlessness

Opioids
  • Relieve the sensation of breathlessness - there is much evidence of efficacy and safety in doses of less than 20mg per day
  • Start low and go slow e.g. prescribe immediate release oral Morphine (e.g. Oramorph®) 2.5mg–5mg P.R.N., then regularly 4-6 hourly if beneficial
  • Even lower doses may help if elderly or frail eg 1mg to 2mg oral Morphine
  • Long-acting opioids can be very effective and are safe eg Morphine Modified Release Tablets 5mg bd
Benzodiazepines
  • Useful for those patients with anxiety/panic associated with episodes of breathlessness
  • Less evidence for efficacy than opioids in relieving breathlessness
  • e.g. Lorazepam (1mg blue tablet – Genus or Teva brand) 0.5mg sublingual 4–6 hourly P.R.N. 
Mirtazapine

Some evidence that this can help the sensation of breathlessness, possibly by reducing panic. Start with 15mg at night.

For breathless patients already on opioids for pain

Lower opioid dose needed than breakthrough analgesic dose is often sufficient for breathlessness, e.g. 25-50% of the current PRN analgesic dose.

Oxygen

Limited value if oxygen saturation is already >92%. Some patients however find the work of breathing is eased by Oxygen even if if SATs are good.

Breathlessness in the last days
  • Continue non-pharmacological treatments
  • Morphine 2.5 mg to 5 mg and Midazolam 2.5 mg -5mg subcutaneously P.R.N. for repiratory distress - this is important as no-one wants to experience or watch someone gasping for breath
  • If several injections are needed, then a syringe pump may be beneficial
  • Morphine 10 mg over 24 hours via a syringe pump, increasing stepwise to Morphine 30 mg over 24 hours as needed (start with 5mg if very frail)
  • Midazolam 10 mg over 24 hours via the syringe driver, increasing stepwise to Midazolam 60 mg over 24 hours as required (start with 5mg if very frail)

Key Points

  • Do contact the local specialist palliative care team for more specific advice
  • Lower starting doses in frail elderly and those in renal failure
  • Remember non-drug methods to relieve breathlessness
  • Identify and treat reversible causes of breathlessness in the dying person, for example pulmonary oedema or pleural effusion, if appropriate
  • Consider an opioid and benzodiazepine combination for patients at the end of life
  • Sedation and opioid use should not be withheld because of a fear of causing respiratory depression. The intention is to relieve respiratory distress, not to hasten death

Recommended Resources

West Midlands Palliative Care - Breathlessness in the last days

Published 1st July 2024

Scottish Palliative Care Guidelines - Breathlessness

Published 1st April 2020

Palliat Med: Use of mirtazapine in patients with chronic breathlessness: A case series

Published 1st October 2018

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