Oseltamivir
System: AllopathyClass: Antiviral (Neuraminidase Inhibitor)Composition: Oseltamivir PhosphatePrescription: Prescription OnlyEssential medicine (NLEM): Yes
Oseltamivir treats and prevents influenza, including H1N1, and works best within 48 hours of symptoms.
Common brands
- Fluvir
- Tamiflu
Dosage forms
- Capsule
- Suspension
Uses
- Influenza treatment
- Influenza prevention in contacts (as advised)
How it works
Stops flu viruses from spreading between cells.
How to take
Usually twice daily for 5 days, with food.
Common side effects
- Nausea
- Vomiting
- Headache
Serious side effects — get medical help
- Behaviour changes in children (rare)
- Severe skin reactions (rare)
Who should not take it
- Allergy to oseltamivir
Interactions
- Live nasal flu vaccine
Pregnancy & breastfeeding
Recommended in pregnancy for flu when advised.
Alcohol & driving
No specific restriction.
Storage
Store below 25°C.
Used for these conditions
Prescribed by
Brands available in India
Frequently asked questions
What is Oseltamivir used for?
Influenza treatment, Influenza prevention in contacts (as advised)
What are the side effects of Oseltamivir?
Nausea, Vomiting, Headache
How should I take Oseltamivir?
Usually twice daily for 5 days, with food.
Who should not take Oseltamivir?
Allergy to oseltamivir
Medically reviewed by
Medical review pending
Last updated
11 October 2026
Sources
- National List of Essential Medicines (NLEM) 2022, MoHFW
- National Formulary of India, Indian Pharmacopoeia Commission
- CDSCO approved drug information
This information is for general awareness and does not replace advice from a qualified doctor. Do not start, stop or change any medicine without medical advice.