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How to Prevent and Manage Flu and Its Complications: Practical Steps, Medications, and When to Seek Care

Professional header illustration with a clean light-blue background, bold dark-blue headline text on the left reading “How to Prevent and Manage Flu and Its Complications,” and a doctor in a white coat on the right; subtle medical icons (syringe, virus, mask, pill bottle, shield) appear faintly in the background to reinforce the health topic.

Get your annual flu shot, practice basic hygiene (handwashing, masks when sick), and start antiviral treatment early if you’re high‑risk or very ill  –  antivirals shorten illness and lower complications when used promptly.

Why prevention matters

Flu can be serious. Annual vaccination is the single best way to reduce your risk of getting sick and of severe outcomes like hospitalization. Simple daily habits  –  handwashing, staying home when sick, improving indoor air  –  also cut spread and protect people who are vulnerableCDC.

How well the vaccine works

Vaccine effectiveness varies by season and strain, but recent U.S. data show the 2024–25 vaccine reduced medically attended flu and hospitalizations across age groups, supporting vaccination for everyone 6 months and older.

Who’s at higher risk

People most likely to have complications include young children, adults 65+, pregnant people, and those with chronic conditions (asthma, heart disease, diabetes, weakened immune systems)  –  they should seek care early if symptoms start.

Quick guide: when to call a doctor

  • Call now if you have trouble breathing, chest pain, severe dizziness, confusion, or signs of dehydration.
  • Start antivirals promptly if you’re hospitalized, very sick, or high‑risk  –  don’t wait for test results.

Medications: what helps, pros/cons, side effects

MedicationFormProsConsCommon side effects
Oseltamivir (Tamiflu)Oral pill/liquidWidely recommended; approved for infants ≥2 weeks; reduces illness duration when started earlyMust be taken twice daily for 5 days; supply can fluctuateNausea, vomiting; rare neuropsychiatric events
Baloxavir (Xofluza)Single oral doseSingle‑dose convenience; may reduce hospital visits in some studiesNot recommended in pregnancy/breastfeeding; limited data in hospitalized patientsDiarrhea, nausea; possible resistance concerns
Zanamivir (Relenza)Inhaled powderAlternative for some patients; effective if used earlyNot for people with asthma/COPD; inhaled routeCough, throat irritation; bronchospasm risk
Peramivir (Rapivab)IV infusionSingle IV dose for those who can’t take oral medsRequires healthcare setting for infusionDiarrhea, neutropenia (rare)
OTC symptom meds (acetaminophen/ibuprofen, decongestants)OralRelieve fever, aches, congestion; easy accessTreat symptoms only; watch dosing and interactionsStomach upset (NSAIDs), liver risk (acetaminophen)

Practical home care

  1. Rest and hydration. Sleep and fluids support your immune system and help thin mucus; aim for water, broths, and electrolyte drinks if you can’t eat much. 
  2. Symptom relief. Use acetaminophen or ibuprofen for fever and aches (follow dosing on the label). Avoid aspirin in children because of Reye syndrome risk. 
  3. Antiviral treatment for eligible people. If you’re high‑risk (young children, 65+, pregnant, chronic conditions) or very sick, contact your clinician immediately—antivirals work best when started within 48 hours of symptoms. 
  4. Isolation and masking. Stay home and avoid contact with others until 24 hours after fever resolves without fever‑reducing meds; wear a mask around household members if you must be near them. 
  5. Cleaner air and surface hygiene. Open windows, use HEPA filtration if available, and disinfect high‑touch surfaces; wash hands frequently or use alcohol hand rubs. 
  6. Caring for children and dependents. Minimize face‑to‑face time, hold children so they don’t cough in your face, and monitor for emergency signs (fast breathing, poor fluid intake, confusion).

Risks and trade‑offs

ActionBenefitWhen to useRisks / Trade‑offs
Rest & fluidsSpeeds recoveryAll casesMay need help with chores/childcare
AntiviralsShorten illness, reduce complicationsHigh‑risk or severe; within 48 hrsMust access clinician quickly; side effects possible
Masking & isolationProtects othersWhile symptomatic and 24 hrs after feverWork/childcare disruption
Fever reducersComfort, lower feverFor high fever or painMasks worsening signs; dosing errors risk
Air cleaning & disinfectionLowers household spreadWhen caring for sick personCost, logistics

When to escalate. Emergency signs – difficulty breathing, chest pain, severe dizziness, persistent vomiting, confusion, or signs of dehydration – require immediate medical attention; waiting risks rapid deterioration.

Sources (14)

  1. Preventing Seasonal Flu | Influenza (Flu) | CDC 
  2. Influenza (Flu) | CDC 
  3. Healthy Habits to Prevent Flu | Influenza (Flu) | CDC 
  4. Preliminary Flu Vaccine Effectiveness (VE) Data for 2024-2025 
  5. Interim Estimates of 2024–2025 Seasonal Influenza Vaccine Effectiveness — Four Vaccine Effectiveness Networks, United States, October 2024–February 2025 | MMWR 
  6. Baloxavir Outperforms Oseltamivir in Reducing Flu Hospitalisations 
  7. Baloxavir reduces flu-related hospitalizations more than oseltamivir 
  8. Influenza Antiviral Medications: Summary for Clinicians 
  9. Treating Flu with Antiviral Drugs | Influenza (Flu) | CDC 
  10. Clinical practice guidelines for influenza 
  11. Influenza (flu) – Symptoms and causes – Mayo Clinic 
  12. Tamiflu: Consumer Questions and Answers | FDA 
  13. Tamiflu Side Effects: Common, Severe, Long Term 
  14. People at Increased Risk for Flu Complications | Influenza (Flu) | CDC