Treatment Pathway
Treatment of Influenza (Flu)
Influenza is a highly contagious respiratory viral illness caused by influenza A or B viruses. It spreads through respiratory droplets and causes sudden fever, severe body aches, fatigue, cough, and headache. Annual vaccination is recommended for prevention.
WHO Global Antimicrobial GuidelinesIDSA (Infectious Diseases Society of America)NICE (UK)ECDC (European Centre for Disease Prevention)Surviving Sepsis Campaign
Managing Influenza (Flu) effectively requires a combination of medical treatment, lifestyle modification, and regular monitoring. With a structured management plan, most people with Influenza (Flu) can maintain a good quality of life and prevent serious complications.
First-Line Treatment Principles
- ✓Identify pathogen and antimicrobial sensitivities before initiating targeted therapy
- ✓De-escalate antimicrobial spectrum as soon as culture/sensitivity results available
- ✓Source control: drainage of abscesses, removal of infected catheters/prosthetics
- ✓Empirical antibiotics: cover likely pathogens based on clinical syndrome and local resistance patterns
- ✓Adhere to minimum effective duration to reduce resistance selection
What to Do Now
- Learn your personal risk factors for Influenza (Flu) (family history, age, lifestyle)
- Attend regular health check-ups and screening tests appropriate for your age and risk
- Track new or changing symptoms, especially those associated with Influenza (Flu)
- Use our AI symptom checker to assess whether your symptoms fit an early Influenza (Flu) pattern
- Discuss preventive strategies and early monitoring with your GP
- Build a personalised management plan with your GP or specialist
- Adhere consistently to prescribed medications — do not stop without medical advice
- Adopt a Influenza (Flu)-appropriate diet (anti-inflammatory, low-glycaemic, or disease-specific)
Medications Used in Influenza (Flu)
OseltamivirAntiviral
Oseltamivir is an antiviral medication used to prevent or treat viral infections by interfering with viral replication.
ZanamivirAntiviral
Zanamivir is an antiviral medication used to prevent or treat viral infections by interfering with viral replication.
BaloxavirAntiviral
Baloxavir is an antiviral medication used to prevent or treat viral infections by interfering with viral replication.
Non-Pharmacological Management
- •Infection prevention: hand hygiene, vaccination, insect bite prevention (malaria/dengue/Lyme)
- •Isolation precautions for highly contagious or drug-resistant organisms
- •Nutritional support: adequate protein and calorie intake during infectious illness
- •Rest and adequate hydration during acute illness
- •Vector control for vector-borne diseases (mosquito nets, repellents, chemoprophylaxis for travel)
- •Contact tracing for notifiable diseases (TB, meningococcal, sexual infections)
Treatment Goals
🎯Microbiological eradication: negative cultures, resolution of pathogen-specific markers
🎯Clinical cure: resolution of fever, inflammatory markers, and organ dysfunction
🎯Prevention of complications: abscess formation, septicaemia, chronic infection
🎯Minimise antimicrobial resistance development through appropriate stewardship
🎯Return to full functional capacity and prevention of recurrence
Monitoring Parameters
- ◆Temperature, heart rate, respiratory rate, and blood pressure: 4-hourly in hospital
- ◆CRP, procalcitonin: inflammation markers to guide treatment response and de-escalation
- ◆Blood cultures: before antibiotics if systemic infection suspected; repeat if deterioration
- ◆Organ function: LFTs, renal function, FBC — especially with prolonged therapy
- ◆Antimicrobial drug levels (vancomycin, aminoglycosides) to optimise dosing and prevent toxicity
- ◆Clinical response at 48–72h: reassess empirical therapy if no improvement
Red Flags — When to Escalate
- ⚠Any of the characteristic symptoms of Influenza (Flu) — even mild — in a high-risk individual
- ⚠Progressive worsening of early warning signs over weeks
- ⚠Laboratory abnormalities (e.g., blood sugar, inflammatory markers) without full symptoms
- ⚠Unexplained weight loss, night sweats, or fatigue persisting >2 weeks
- ⚠Strong family history of Influenza (Flu) combined with new relevant symptoms
- ⚠Sudden worsening of Influenza (Flu) symptoms despite established treatment
Escalation Criteria
- →Sepsis/septic shock: immediate IV broad-spectrum antibiotics within 1 hour; ICU admission
- →Clinical deterioration at 48–72h despite appropriate antibiotics → reassess diagnosis, obtain cultures, consider resistant organisms
- →Drug-resistant organism identified → infectious disease specialist review
- →Immunocompromised host: lower threshold for escalation; consider uncommon pathogens (fungal, mycobacterial)
Special Populations
Immunocompromised: HIV, transplant, chemotherapy patients need broader empirical coverage and lower threshold for invasive investigation
Pregnancy: many antibiotics restricted (fluoroquinolones, tetracyclines, aminoglycosides) — seek specialist guidance
Children: weight-based dosing; higher suspicion for unusual organisms (meningococcal in adolescents, Haemophilus in unvaccinated)
Elderly: impaired immune response; higher risk of drug toxicity; atypical presentations (confusion as only sign)
Clinical Insights
Compare With Similar Conditions
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