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Unexplained chronic cough — Clinical Guidelines

Overview

Chronic cough lasting more than 8 weeks is a common condition affecting approximately 10% of adults, often refractory to treatment of underlying causes and characterized by cough hypersensitivity 1 13 21.

Diagnosis

Key Criteria: Cough duration >8 weeks 1 6 13.

Recommended Tests:

- Comprehensive history and physical examination 1 13. - Pulmonary function tests 1 13. - Multidisciplinary investigations including ENT, GI, and pulmonology evaluations 12 23. - Triple endoscopy in pediatric patients 12. - Consider GERD assessment with reflux finding score (RFS) 16.

Differential Diagnosis: Exclude common causes like asthma, GERD, and postnasal drip; consider less common etiologies 1 13 24.

Management

First-Line Treatments:

- Address identifiable causes (e.g., asthma, GERD) with appropriate medications 1 13 24. - Lifestyle modifications and smoking cessation 1 13.

Adjunctive Treatments:

- Speech-Language Pathology Therapy: Effective for reducing cough frequency and improving quality of life 4 7 14 26 34. - Behavioral Speech Therapy (BST): Demonstrates significant benefit in refractory cases 7 14. - Neuromodulators: Increasingly used by laryngologists for refractory cases 2. - Physiotherapy and Speech Therapy Interventions: Emerging non-pharmacological options showing promise 17 19.

Special Populations

Pediatrics: Chronic cough defined as >4 weeks in children aged 14 years or older; consider aerodigestive causes and multidisciplinary approaches 5 9 12.

Elderly: Increased complexity due to comorbidities; thorough evaluation essential 13.

Comorbidities: Management should address coexisting conditions like GERD, asthma, and upper airway disorders 1 13 16.

Key Recommendations

Exclude identifiable causes through comprehensive evaluation before considering unexplained chronic cough 1 6 28 (Evidence: Strong).

Implement speech-language pathology therapy as a first-line adjunctive treatment for refractory chronic cough 4 7 14 26 34 (Evidence: Strong).

Consider multidisciplinary approaches including ENT, GI, and pulmonology evaluations for persistent cases 12 23 (Evidence: Moderate).

Evaluate and manage GERD as part of the diagnostic workup due to its significant overlap with chronic cough 16 (Evidence: Moderate).

Use behavioral speech therapy for patients with refractory chronic cough, given its demonstrated efficacy 7 14 (Evidence: Strong).

References

1 Chung KF, Mazzone SB. Chronic Cough Hypersensitivity as a Neuropathic Disorder: Implications for Management and New Treatments. Annual review of medicine 2026. link 2 Dwyer CD, Johns MM, Shin JJ, Carroll TL. Practice Trends in Laryngology: Neuromodulators for Treatment of Chronic Cough. The Laryngoscope 2025. link 3 Zheng K, Tang L, Wang X, Chen L, Zhao Y, Chen X. The risk factors for chronic cough in children: A meta-analysis covering five continents. Respiratory medicine 2024. link 4 Ribeiro VV, Casmerides MCB, da Silva Reis ZMC, de Santana ÍV, do Carmo RD, Behlau M. Efficacy of Speech-language Pathology Therapy in Chronic Cough: Systematic Review With Meta-analysis. Journal of voice : official journal of the Voice Foundation 2024. link 5 Jiang ZY, Gatcliffe C, Mai T, Huang Z. Aerodigestive Approach to Pediatric Chronic Cough. Otolaryngologic clinics of North America 2022. link 6 Weiner M, Dexter PR, Heithoff K, Roberts AR, Liu Z, Griffith A et al.. Identifying and Characterizing a Chronic Cough Cohort Through Electronic Health Records. Chest 2021. link 7 Wright ML, Sundar KM, Herrick JS, Barkmeier-Kraemer JM. Long-Term Treatment Outcomes after Behavioral Speech Therapy for Chronic Refractory Cough. Lung 2021. link 8 Ribeiro VV, Lopes LW, Behlau M. Presentation of the Therapy Program for Management of Chronic Cough. CoDAS 2021. link 9 Marseglia GL, Manti S, Chiappini E, Brambilla I, Caffarelli C, Calvani M et al.. Chronic cough in childhood: A systematic review for practical guidance by the Italian Society of Pediatric Allergy and Immunology. Allergologia et immunopathologia 2021. link 10 Kennedy AA, Anne S, Hart CK. Otolaryngologic Management of Chronic Cough in School-aged Children: A Review. JAMA otolaryngology-- head & neck surgery 2020. link 11 Kapela SL, Vertigan AE, Gibson PG. Speech Pathology Intervention for Chronic Refractory Cough: A Pilot Study Examining the Benefit of Using Prerecorded Videos as an Adjunct to Therapy. Journal of voice : official journal of the Voice Foundation 2020. link 12 Fracchia MS, Diercks G, Cook A, Hersh C, Hardy S, Hartnick M et al.. The diagnostic role of triple endoscopy in pediatric patients with chronic cough. International journal of pediatric otorhinolaryngology 2019. link 13 Mathur A, Liu-Shiu-Cheong PSK, Currie GP. The management of chronic cough. QJM : monthly journal of the Association of Physicians 2019. link 14 Vertigan AE, Haines J, Slovarp L. An Update on Speech Pathology Management of Chronic Refractory Cough. The journal of allergy and clinical immunology. In practice 2019. link 15 Slinger C, Mehdi SB, Milan SJ, Dodd S, Matthews J, Vyas A et al.. Speech and language therapy for management of chronic cough. The Cochrane database of systematic reviews 2019. link 16 Rosen R, Mitchell PD, Amirault J, Amin M, Watters K, Rahbar R. The Edematous and Erythematous Airway Does Not Denote Pathologic Gastroesophageal Reflux. The Journal of pediatrics 2017. link 17 Chamberlain Mitchell SA, Garrod R, Clark L, Douiri A, Parker SM, Ellis J et al.. Physiotherapy, and speech and language therapy intervention for patients with refractory chronic cough: a multicentre randomised control trial. Thorax 2017. link 18 Krakowiak K, Dąbrowska M, Buła F, Łobacz A, Rojek D, Grabczak EM et al.. Speech therapy - a non-pharmacological method to manage difficult-to-treat chronic cough. Advances in respiratory medicine 2017. link 19 Birring SS, Floyd S, Reilly CC, Cho PSP. Physiotherapy and Speech and Language therapy intervention for chronic cough. Pulmonary pharmacology & therapeutics 2017. link 20 Morice AH, Millqvist E, Belvisi MG, Bieksiene K, Birring SS, Chung KF et al.. Expert opinion on the cough hypersensitivity syndrome in respiratory medicine. The European respiratory journal 2014. link 21 Cornere MM. Chronic cough: a respiratory viewpoint. Current opinion in otolaryngology & head and neck surgery 2013. link 22 Gawron AJ, Kahrilas PJ, Pandolfino JE. Chronic cough: a gastroenterology perspective. Current opinion in otolaryngology & head and neck surgery 2013. link 23 Athanasiadis T, Allen JE. Chronic cough: an otorhinolaryngology perspective. Current opinion in otolaryngology & head and neck surgery 2013. link 24 McGarvey L. The difficult-to-treat, therapy-resistant cough: why are current cough treatments not working and what can we do?. Pulmonary pharmacology & therapeutics 2013. link 25 Chamberlain S, Garrod R, Birring SS. Cough suppression therapy: does it work?. Pulmonary pharmacology & therapeutics 2013. link 26 Vertigan AE, Gibson PG. The role of speech pathology in the management of patients with chronic refractory cough. Lung 2012. link 27 Poulose V, Bin Mohd I. Prolonged cough presenting with diagnostic difficulty: a study of aetiological and clinical outcomes. Singapore medical journal 2011. link 28 Irwin RS. Unexplained cough in the adult. Otolaryngologic clinics of North America 2010. link 29 Field SK, Conley DP, Thawer AM, Leigh R, Cowie RL. Effect of the management of patients with chronic cough by pulmonologists and certified respiratory educators on quality of life: a randomized trial. Chest 2009. link 30 Gibson PG, Vertigan AE. Speech pathology for chronic cough: a new approach. Pulmonary pharmacology & therapeutics 2009. link 31 Vertigan AE, Theodoros DG, Winkworth AL, Gibson PG. A comparison of two approaches to the treatment of chronic cough: perceptual, acoustic, and electroglottographic outcomes. Journal of voice : official journal of the Voice Foundation 2008. link 32 Rank MA, Kelkar P, Oppenheimer JJ. Taming chronic cough. Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology 2007. link60875-7) 33 Simpson CB, Amin MR. Chronic cough: state-of-the-art review. Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery 2006. link 34 Vertigan AE, Theodoros DG, Gibson PG, Winkworth AL. Efficacy of speech pathology management for chronic cough: a randomised placebo controlled trial of treatment efficacy. Thorax 2006. link 35 Morice AH, Kastelik JA. Cough. 1: Chronic cough in adults. Thorax 2003. link 36 Walamies MA. A teenager with an annoying cough. The Journal of adolescent health : official publication of the Society for Adolescent Medicine 2000. link00121-x) 37 Lewis M, McClay JE, Schochet P. Lingual tonsillectomy for refractory paroxysmal cough. International journal of pediatric otorhinolaryngology 2000. link00302-5) 38 Irwin RS. Silencing chronic cough. Hospital practice (1995) 1999. link 39 Callahan CW. Etiology of chronic cough in a population of children referred to a pediatric pulmonologist. The Journal of the American Board of Family Practice 1996. link

Unexplained chronic cough