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Tamiflu can reduce the length of time you are ill with flu by up to 24 hours, and can halve the chances of catching flu from an infected person. You can order it in advance from our online service, so that you can take it as soon as possible when needed. This will greatly increase its effectiveness.

"You can order Tamiflu for Same-Day Collection, or choose between Next-Day and FREE Standard Delivery."

Dr Gigi Taguri
Key Features
  • Available to be ordered in advance
  • Can reduce the time you are ill with flu by up to one day
  • Can help prevent you from catching flu
Tamiflu can reduce your risk of catching flu from an infected person.
Dr Gigi Taguri

Key Information

The medicine

Tamiflu (oseltamivir phosphate)


Tamiflu can reduce the length of time you are ill with flu by up to one day, and can reduce the chances of you catching flu from an infected individual by 50%. Tamiflu is particularly recommended if you have a weakened immune system, heart disease or lung disease.

How it works

Unlike over-the-counter remedies, Tamiflu goes to the source of the flu virus and helps stop it spreading through the body. After a certain point during a bout of flu, there are too many infected cells for Tamiflu to work effectively and therefore it must be taken as early as possible.

How to take Tamiflu

How you should take Tamiflu depends on whether you are treating yourself for flu or whether you are taking Tamiflu because you have been in close contact with someone who has flu. We will provide more detailed advice when we send you the tablets.

Side effects

Possible side effects include nausea, vomiting, diarrhoea, stomach ache, abdominal pain, headaches and conjunctivitis. Rare side effects include skin reactions, inflammation of the liver and visual disturbances.

Taking Tamiflu

If you are taking Tamiflu to treat flu, you need to start taking it within 48 hours of the symptoms first appearing. For this reason, if you have currently have the flu and think you should be taking Tamiflu, you should call your GP surgery rather than ordering it through our online service.

You will usually be prescribed one tablet twice a day for five days.

Our online service is intended to make it more convenient to order Tamiflu in advance. You can order it in advance to help reduce the duration of flu if you end up becoming infected, or to minimise the chances of developing symptoms if you have been in close contact with someone who has flu.

Alternative Treatments

If you have flu you should stay at home and rest, keep warm and drink plenty of water to avoid dehydration. You can take paracetamol or ibuprofen to help with the fever and aching muscles.

An alternative prescription-only antiviral medicine to Tamiflu that you could take is Relenza (zanamivir), a dry powder that you breathe in through an inhaler. This is not available through our service.

You can order the flu vaccination through our online flu jab service.

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