Treatment for Dry Cough
For acute dry cough, use central antitussives like dextromethorphan or codeine for short-term symptomatic relief, particularly when cough interferes with sleep or daily activities.
Treatment Algorithm Based on Clinical Context
Upper Respiratory Infection (URI) with Dry Cough
- Ipratropium bromide (inhaled anticholinergic) is the only recommended inhaled agent for cough suppression in URI 1
- Central antitussives (codeine, dextromethorphan) have limited evidence for URI-related cough and are NOT strongly recommended for this indication 1
- Peripheral cough suppressants have limited efficacy in URI and are not recommended 1
Chronic Bronchitis with Dry Cough
- Central cough suppressants (codeine or dextromethorphan) are recommended for short-term symptomatic relief 1
- Ipratropium bromide is also effective in this population 1
- Peripheral cough suppressants like levodropropizine and moguisteine are recommended where available 1
Acute Non-Productive Cough (General)
- Antitussives are indicated primarily to improve quality of life during ongoing infection 2
- Combination therapy with dextromethorphan plus antihistamine (preferably non-sedating like bilastine) and decongestant is effective and well-tolerated 3
- First-generation antihistamines (chlorpheniramine) combined with codeine provide sedation that is valuable when cough disturbs sleep 4
Key Clinical Considerations
Avoid mucoactive agents in dry cough - these are only appropriate for productive cough with sputum 1, 2. The guideline explicitly states agents that alter mucus characteristics are NOT recommended for cough suppression in chronic bronchitis (Grade D recommendation) 1.
Codeine should be used as last resort - reserve codeine-based preparations for unexplained chronic cough when other treatments have failed 5. The evidence supports codeine primarily in chronic bronchitis, not routine URI 1.
Non-sedating combinations are preferred for daytime use - bilastine/dextromethorphan/phenylephrine combinations provide effective cough relief with significantly lower drowsiness scores compared to sedating antihistamines 3.
Common Pitfalls
- Do not use expectorants or mucolytics for dry cough - these are contraindicated when there is no sputum production
- Avoid long-term antitussive use - these are recommended only for SHORT-TERM symptomatic relief 1
- Do not overlook the importance of identifying the underlying cause - treatment effectiveness depends on knowing the specific disorder eliciting cough 1
Practical Prescribing
For nighttime cough disrupting sleep:
- Codeine + chlorpheniramine combination (sedation is beneficial) 4
For daytime symptom control:
- Dextromethorphan + bilastine + phenylephrine (non-sedating) 3
- Ipratropium bromide inhaler for URI or bronchitis 1
Duration: Limit to 7 days or less for acute cough 3. Reassess if symptoms persist beyond this timeframe.