Pooled data from clinical trials provide conflicting evidence regarding the use of nebulized lidocaine for refractory or intractable cough. Overall, many studies suggest no significant advantage, though outcomes appear to vary by clinical context. For instance, literature in hospice populations reports that nebulized lidocaine can provide rapid cough suppression in a substantial proportion of patients, whereas studies in patients undergoing bronchoscopy found no difference between nebulized a...
A 2025 review undertook a comprehensive evaluation of the efficacy and safety of nebulized lidocaine for managing intractable cough in hospice care settings. The study encompassed a systematic literature search spanning from 1973 to 2023, examining 265 studies and selecting 58 that met rigorous inclusion criteria. The principal findings indicated that nebulized lidocaine, administered in concentrations of 1–4%, provided rapid cough suppression within 15 minutes in 70% of cancer patients, with effects lasting up to four hours. Reported side effects were generally mild and transient, such as oropharyngeal numbness and a bitter taste. However, bronchoconstriction was noted in 25% of asthmatic patients, necessitating bronchodilator intervention. Notably, lidocaine was effective in reducing opioid usage and enhancing patient comfort in 80% of cases. Despite its efficacy, variability in results was observed, particularly in patients with severe chronic obstructive pulmonary disease (COPD)...
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A search of the published medical literature revealed
4 studies investigating the researchable question:
Is there any data in term of clinical trials that show benefit of using nebulized lidocaine for treatment of refractory cough, or cough post-tracheostomy?
Level of evidence
C - Multiple studies with limitations or conflicting results
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[1] Pan J, Khan AA, Yu W, Rui L. "Nebulized lidocaine for intractable cough in hospice care: a comprehensive review of efficacy, safety, and future perspectives". BMC Palliat Care. 2025 Apr 30;24(1):123. doi: 10.1186/s12904-025-01752-z.
[2] Slaton RM, Thomas RH, Mbathi JW. Evidence for therapeutic uses of nebulized lidocaine in the treatment of intractable cough and asthma. Ann Pharmacother. 2013;47(4):578-585. doi:10.1345/aph.1R573
[3] Zheng J, Du L, Du B, Zhang W, Zhang L, Chen G. Airway nerve blocks for awake tracheal intubation: A meta-analysis of randomized control trials and trial ...