Prescribing Prednisone with Tamiflu for Cough

Introduction to Guideline Recommendations

The American College of Chest Physicians recommends against routine prescription of oral corticosteroids for acute bronchitis in immunocompetent adults, as high-quality evidence demonstrates no benefit in reducing symptom duration or severity 1
Neither the CDC nor IDSA guidelines recommend adding corticosteroids to antiviral therapy for standard influenza cases 5, 6

No known drug interactions exist between oseltamivir and prednisone, with oseltamivir primarily excreted renally via glomerular filtration and tubular secretion 3, 4
Concurrent use is pharmacologically safe, but the clinical appropriateness depends entirely on the indication for prednisone, not on any interaction with Tamiflu 3, 4

For acute exacerbation of chronic bronchitis/COPD, prescribe prednisone 40 mg daily for 5-7 days, as this is a different clinical entity than acute bronchitis and does warrant corticosteroids 1
For suspected cough variant asthma, a diagnostic-therapeutic trial of prednisone 30 mg daily for 2 weeks can be used, with expected response within 3 days 2
If cough persists 3-8 weeks after influenza and severely affects quality of life, consider prednisone 30-40 mg daily for a short, finite period, only after first-line and second-line treatments have failed and other causes have been ruled out 1, 2, 7

For patients already on immunomodulator therapy, including chronic corticosteroids, CDC guidelines recommend early antiviral therapy with oseltamivir for suspected or confirmed influenza to reduce risk of complications 6
For immunocompromised patients, the concern is that pre-existing immunosuppression increases influenza complication risk, making Tamiflu more important, not that adding Tamiflu to existing steroids is problematic 6

For acute cough (<3 weeks), no prednisone is recommended unless confirmed asthma/COPD exacerbation, and Tamiflu should be prescribed alone if influenza is suspected within 48 hours of symptom onset 1, 2
For subacute/post-infectious cough (3-8 weeks), consider prednisone only for severe paroxysms after stepwise failure of ipratropium and inhaled corticosteroids 1, 2, 7
For chronic cough (>8 weeks), investigate other diagnoses, as this is no longer post-infectious cough 2, 7