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Tamiflu-NA
Oseltamivir Phosphate
$240.00
30mg · 6 × 10 capsules · 1 month supply
BrandBranded medicine· By Roche
$240.00 per month
Strength
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Annual cost
$2920a year at this pack size
Prescription required
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30mg
45mg
75mg
About Tamiflu-NA
Overview
Tamiflu-NA is a prescription capsule containing oseltamivir phosphate, an antiviral medicine. It treats acute, uncomplicated influenza A and B in patients aged 2 weeks and older whose symptoms started no more than 48 hours ago. It is also used to prevent influenza A and B in patients aged 1 year and older, but does not replace annual flu vaccination. It works by blocking neuraminidase, an enzyme in influenza viruses.
What it treats
- Treatment of acute, uncomplicated influenza A and B in patients aged 2 weeks and older whose symptoms began no more than 48 hours ago. - Prevention of influenza A and B in patients aged 1 year and older.
Safety information
Side effects
Common side effects include nausea, vomiting and headache. Pain was also commonly reported in studies of use to prevent influenza. Serious allergic reactions, including anaphylaxis, and serious skin reactions have been reported. These include Stevens-Johnson syndrome, toxic epidermal necrolysis and erythema multiforme. Stop taking oseltamivir and seek medical help immediately if an allergic reaction or serious skin reaction occurs or is suspected. Confusion, hallucinations, delirium and abnormal behavior have been reported in people with influenza, including those taking oseltamivir, particularly children. Some events have led to injury or death. It is not established whether oseltamivir contributes to these events; influenza itself can cause them. Watch closely for changes in behavior and contact a doctor immediately if they occur. The doctor should assess whether treatment should continue.
When to call your doctor
If symptoms are severe or getting worse quickly, seek emergency care rather than waiting.
Before taking this medicine
Do not take Tamiflu-NA if you have a known serious allergy to oseltamivir or any ingredient in the capsules. Severe allergic reactions, including anaphylaxis and serious skin reactions such as Stevens–Johnson syndrome, toxic epidermal necrolysis and erythema multiforme, have been reported. Stop taking it and seek medical care if an allergic reaction occurs or is suspected. People with influenza, particularly children, should be closely monitored for confusion, hallucinations or unusual behaviour. These events have sometimes led to injury or death. It is not known whether oseltamivir contributes to them, and influenza itself can cause these symptoms. If they occur, the prescriber should assess whether treatment should continue. Serious bacterial infections can resemble influenza, occur alongside it or develop as a complication. Oseltamivir has not been shown to prevent these complications, and there is no evidence that it works against illnesses caused by pathogens other than influenza viruses. Suspected bacterial infections need medical assessment and appropriate treatment.
Interactions
Tell your doctor if you have recently received or plan to receive a live attenuated nasal-spray flu vaccine. This vaccine should be avoided within 2 weeks before or 48 hours after using oseltamivir, unless your doctor considers it medically necessary.
Using Tamiflu-NA
Dosing
Dosing is set by your prescriber. Each health care professional may prescribe medication differently according to a patient's medical history and condition, so follow the directions on your prescription label and speak to your doctor or pharmacist before changing anything.
Storage
Store below 25°C in a dry place, in the original pack, away from direct light and moisture. Do not keep it in a bathroom. Keep all medicines out of the sight and reach of children.
Clinical information on this page is summarised from the US FDA label OSELTAMIVIR PHOSPHATE CAPSULE [STRIDES PHARMA SCIENCE LIMITED] (DailyMed, retrieved 19 September 2026).
Patient information and references
Official and supporting information to read alongside advice from your prescriber or pharmacist.
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