Treatment of Refractory Cough After 8 Weeks

Initial Reassessment Before Declaring Cough "Refractory"

The American College of Physicians recommends confirming the top three diagnoses, including Upper airway cough syndrome (UACS), asthma/cough-variant asthma, and gastroesophageal reflux disease (GERD), have been properly treated, as they account for over 90% of chronic cough cases, either alone or in combination 1
The American Thoracic Society suggests verifying medication review was completed, including discontinuation of ACE inhibitors and sitagliptin, which are common iatrogenic causes of cough 1
The European Respiratory Society notes that up to 40% of patients have multiple etiologies requiring combination therapy, and assuming a single cause is a critical pitfall 1
The American College of Chest Physicians recommends ensuring adequate treatment duration for asthma, as complete resolution of cough-variant asthma may require up to 8 weeks of treatment with inhaled corticosteroids 2

The British Thoracic Society suggests performing assessment of airway inflammation, including evaluation of induced sputum or BAL fluid, to identify patients who may benefit from more aggressive anti-inflammatory therapy 2
The American College of Allergy, Asthma, and Immunology recommends considering nonasthmatic eosinophilic bronchitis (NAEB) as an important but less common cause of refractory cough, which requires specific identification and responds to corticosteroids 1

The American Academy of Neurology recommends gabapentin as the preferred first-line agent for refractory chronic cough, starting at 300mg once daily and escalating to a maximum of 1,800mg daily in divided doses 1
The American College of Gastroenterology notes that diffuse panbronchiolitis in patients with recent residence in Japan, Korea, or China requires consideration of prolonged treatment with erythromycin or other 14-member ring macrolides 3

The American Gastroenterological Association recommends against using acid suppression alone for GERD-related cough, and instead suggests comprehensive GERD management 1
The American Thoracic Society advises against assuming inhaled corticosteroid failure means non-asthmatic disease, and instead recommends trying switching formulations before abandoning this approach 2
The American College of Physicians recommends using validated cough severity tools to objectively assess treatment response and determine true treatment efficacy 1