Influenza Treatment Guidelines

Antiviral Treatment

The Centers for Disease Control and Prevention recommends initiating oseltamivir 75 mg twice daily for 5 days for patients presenting within 48 hours of symptom onset with confirmed or suspected influenza, prioritizing treatment for high-risk patients and those with severe illness 1
Mandatory treatment groups include all hospitalized patients with suspected influenza, patients with severe, complicated, or progressive illness, and high-risk patients such as children under 2 years, adults 65 years and older, and those with chronic medical conditions 1
The American Thoracic Society suggests considering treatment for previously healthy outpatients presenting within 48 hours of symptom onset, based on clinical judgment, and for patients with COPD or other severe pre-existing illnesses 2, 3

Oseltamivir is the preferred antiviral agent, with a recommended adult dosing of 75 mg orally twice daily for 5 days 2, 3, 4
For pediatric patients, weight-based dosing using oral suspension is recommended, with dosing as follows:
Renal adjustment is recommended, with a 50% dose reduction if creatinine clearance is less than 30 mL/min 2, 3

Antibiotics are not routinely required for previously healthy patients with uncomplicated influenza, as influenza is a viral illness and antibiotics have no effect on viral infections 2, 3, 7
Consider antibiotic use in patients with significant worsening of symptoms, particularly recrudescent fever or increasing breathlessness, and in patients with COPD or other severe pre-existing illnesses 2, 3, 7
First-line antibiotic choices include doxycycline or co-amoxiclav, with macrolides as an alternative 2, 3

Assess presentation timing and identify risk status to determine the need for oseltamivir initiation 1, 2, 3
Initiate oseltamivir for high-risk patients or those with severe illness presenting within 48 hours, and add antibiotics only if pneumonia is present or secondary bacterial infection is suspected 1, 2, 3