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Oseltamivir (Tamiflu): uses, side effects & brands
Oseltamivir treats and prevents influenza, including H1N1 (swine flu), when started early. It belongs to the Antiviral group. Antivirals treat specific viral infections such as herpes, shingles or influenza.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Antiviral |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Treating influenza (flu), including H1N1, when started early
- Preventing flu after close contact with an infected person
- Flu in high-risk people such as older adults, pregnant women and those with chronic illness
Common brand names
- India: Fluvir, Antiflu, Tamiflu
- Worldwide: Tamiflu
Common side effects
- Nausea or vomiting
- Headache
- Tummy pain
Before taking it — precautions
- Works best started within about two days of symptoms
- Tell your doctor about kidney problems
- It does not replace the flu vaccine
When to see a doctor urgently
- Unusual behaviour, confusion or agitation, especially in children (urgent)
- Breathlessness, chest pain or worsening fever (urgent)
- Severe allergy or skin rash
Not a prescription — no dose shown. The right dose of oseltamivir depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.
Frequently asked questions
Does Tamiflu work for colds?
No — it only works against influenza viruses, not the common cold.
What if I start it late?
It works best within about two days of symptoms. Doctors may still give it later to very ill or high-risk people.
Can taking it with food help?
Yes, taking it with food can reduce nausea.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.