Intravenous Fluids and Antipyretics for Influenza Treatment

Treatment Approach Based on Severity

The American College of Physicians and other medical societies recommend oral antipyretics, such as paracetamol or NSAIDs, with adequate oral hydration as the first-line symptomatic treatment for uncomplicated influenza, with paracetamol used for fever and discomfort only while symptoms persist 3
For patients with acute influenza-like illness, antiviral treatment with oseltamivir should be considered if they have a fever over 38°C, symptoms present for two days or less, or are at high risk of complications, such as those with chronic medical conditions, immunocompromised status, or age under 2 or over 65 years 1, 2
The Infectious Diseases Society of America recommends IV fluids for patients with severe influenza requiring hospitalization, but only when clinically indicated for volume depletion, and patients should be assessed for volume depletion and need for additional intravenous fluids based on clinical presentation 1, 2
The Centers for Disease Control and Prevention suggest that hypoxic patients should receive appropriate oxygen therapy with monitoring of oxygen saturations, and antiviral treatment with oseltamivir should be administered, with a dosage of 75 mg twice daily for 5 days in adults 1, 2, 4

Patients should be advised to seek immediate medical attention if they develop shortness of breath, painful or difficult breathing, bloody sputum, drowsiness, disorientation, or confusion, fever persisting for 4-5 days without improvement, or initial improvement followed by recurrence of high fever, according to the American Academy of Family Physicians 3, 4
The American College of Emergency Physicians recommends hospitalization for patients with unstable vital signs, such as temperature over 37.8°C, heart rate over 100/min, respiratory rate over 24/min, systolic BP under 90 mmHg, or O₂ saturation under 90% 1, 2