Asthma cough management
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Asthma Cough Management: Diagnosis and Assessment
Cough is a common and often troublesome symptom in asthma, sometimes presenting as the main or only symptom, especially in cough-variant asthma (CVA) 15610. CVA is characterized by a persistent cough without the classic asthma symptoms of wheezing or shortness of breath . Diagnosis can be challenging, as standard lung function tests may appear normal, so bronchial provocation tests (like methacholine challenge) are often used to confirm airway hyperresponsiveness . Excluding other causes of chronic cough, such as gastroesophageal reflux disease (GERD) or upper airway cough syndrome, is also important 25.
Standard Treatments for Asthma-Related Cough
The mainstay of treatment for asthma cough, including CVA, is inhaled corticosteroids (ICS), which help reduce airway inflammation and control symptoms 1235+1 MORE. If symptoms persist, increasing the ICS dose or adding other medications such as long-acting beta-agonists (LABA), leukotriene receptor antagonists (LTRA), or slow-release theophylline may be considered 136. Studies show that most patients with CVA experience significant improvement in cough symptoms with ICS/LABA combinations, such as budesonide-formoterol . Leukotriene receptor antagonists are also recommended as a next step if ICS alone is insufficient .
Alternative and Complementary Therapies
Acupuncture has been shown to improve cough symptoms, reduce relapse rates, and enhance lung function in patients with CVA, although more high-quality studies are needed to confirm its safety and effectiveness . Traditional Chinese medicine formulas, such as Modified Dingchuan Decoction, have demonstrated benefits in animal models by reducing lung inflammation and regulating the lung microbiota, suggesting potential as adjunct therapies .
Addressing Cough Hypersensitivity and Treatable Traits
Cough in asthma can be driven by airway inflammation, bronchoconstriction, and cough hypersensitivity, which involves increased sensitivity of airway nerves 5610. For patients with cough hypersensitivity, especially adults, speech and language therapy or neuromodulators like gabapentin may be considered . Recognizing cough as a distinct treatable trait in asthma can help tailor management and improve patient outcomes .
Special Considerations and Symptomatic Relief
In cases where cough is linked to allergic rhinitis or upper airway cough syndrome, non-sedating antihistamines (such as bilastine) and combination therapies with dextromethorphan and phenylephrine may provide additional symptomatic relief, especially in pediatric patients . However, the primary focus should remain on treating the underlying asthma and associated airway inflammation 136.
Gaps in Research and Future Directions
Despite its impact on quality of life and asthma control, cough is often overlooked in clinical trials and asthma management guidelines 910. There is a need for more research to better understand the mechanisms of cough in asthma, develop targeted therapies, and include cough as a key outcome in asthma management 910.
Conclusion
Effective management of asthma-related cough centers on inhaled corticosteroids, with additional therapies considered for persistent symptoms. Complementary treatments like acupuncture and traditional medicine may offer further benefits, but more research is needed. Recognizing cough as a treatable trait and addressing cough hypersensitivity can help personalize care and improve outcomes for patients with asthma cough.
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Most relevant research papers on this topic
Diagnosis and management of cough-variant asthma
Cough-variant asthma is diagnosed by assessing airway hyperresponsiveness and managing with inhalation therapy, including bronchodilators and corticosteroids.
Patient response to the management during the acute presentation of cough variant Asthma: Retrospective cohort study
Budesonide-formoterol inhaler therapy significantly improves cough symptoms in patients with cough variant asthma, providing valuable information for optimizing patient care.
Modified Dingchuan Decoction treats cough-variant asthma by suppressing lung inflammation and regulating the lung microbiota.
Modified Dingchuan Decoction effectively treats cough-variant asthma by suppressing lung inflammation and regulating lung microbiota.
[Focus on cough in asthma should be highlighted].
Cough in asthma is often neglected in clinical practice, affecting quality of life and requiring more clinical trials for assessment and management.
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