From the Research
A fever with influenza typically lasts for 3-4 days, though it can persist for up to 5-7 days in some cases. The fever usually begins abruptly and reaches its peak within 12-24 hours of symptom onset, often ranging from 100.4°F (38°C) to 104°F (40°C) 1. To manage fever, adults can take acetaminophen (Tylenol) 650mg every 6 hours or ibuprofen (Advil, Motrin) 400-600mg every 6-8 hours as needed, while staying well-hydrated with water or clear fluids. Children's dosing should be based on weight and age according to package instructions.
Some key points to consider when managing fever with influenza include:
- The fever occurs as part of the body's immune response to the influenza virus, with the elevated temperature helping to fight the infection by creating an unfavorable environment for viral replication and enhancing immune function 1.
- If the fever lasts longer than 5-7 days, exceeds 103°F (39.4°C) despite medication, or is accompanied by severe symptoms like difficulty breathing or confusion, medical attention should be sought promptly 1.
- Treatment with one of four approved anti-influenza drugs may be considered if the patient presents within 48 hours of symptom onset, with the benefit of treatment being greatest when antiviral therapy is started within 24 hours of symptom onset 1.
- The use of neuraminidase inhibitors such as oseltamivir, zanamivir, laninamivir, and peramivir can help alleviate fever and other symptoms, with peramivir showing significant benefits in some studies 2.
It is essential to note that the management of fever with influenza should prioritize the patient's overall health and well-being, taking into account their age, medical history, and other factors that may influence their response to treatment 1.