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Tamiflu

Influenza|Active ingredient(s): Oseltamvir phosphate|Manufacturer: Roche

A young man in front of a green background with the flu blowing his nose.

Fast flu relief: Treat flu symptoms in 5 days

  • Effective treatment for influenza.
  • Reduces symptom duration & severity.
  • Start within 2 days of symptoms developing.
  • 5-day treatment course.

How to take

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Start ASAP

Start taking Tamiflu within 2 days of symptoms developing. This gives Tamiflu the best chance of working.

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5-day course

Take one capsule twice daily for 5 days. You must complete the full course to prevent flu symptoms from returning.

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Take with food

You can take it with or without food. But taking it with food helps to prevent nausea and vomiting.

What others say about Tamiflu

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Tamiflu

What is Tamiflu?

Tamiflu is a treatment for influenza, more commonly known as “the flu”. It works by helping your body recover from the flu by stopping the spread of the virus, reducing the duration of symptoms by about 2 days.

It can also be used to prevent flu if you have been in contact with someone with symptoms. However, it is not a replacement for the flu vaccine.

You start taking it within 48 hours (2 days) of symptoms appearing, which ensures it is the most effective. You take one capsule twice daily for 5 days.

How does Tamiflu work?

Oseltamivir works on an enzyme called neuraminidase, which is an enzyme that helps the influenza virus from spreading from infected cells to new ones.

Blocking this enzyme prevents the virus from spreading. This slows down the infection and stops the virus from replicating. Your immune system can therefore fight the flu virus, which reduces the duration of symptoms.

How effective is it?

Clinical trials have shown that Tamiflu is an effective treatment for flu.

One clinical trial on 374 flu patients found that it:

  • Reduces symptom severity - Tamiflu tablets reduced symptom severity by 40%*.
  • Cuts symptom duration - Participants saw a 30% reduction in flu duration*.
  • Reduces the risk of complications - The trial found that Tamiflu may help to reduce the risk of secondary complications of the flu.

*When treatment was started within 36 hours of flu symptoms.

Who can use Tamiflu?

Most adults aged 18 and over can use Tamiflu. However, if you have a certain medical condition or take certain medications, you should check with your doctor to see if it's safe for you to use.

You should ask your doctor before using Tamiflu if you:

  • are pregnant or breastfeeding
  • have problems with your kidneys
  • have a weak immune system
  • have a severe medical condition which may require hospitalisation
  • have a chronic heart or lung problem

Consult your doctor if you are unsure whether any of these conditions apply to you.

What dose should I take?

Tamiflu is available as 75 mg capsules. The dose for treating the flu is one 75 mg capsule twice daily for 5 days.

How do I take Tamiflu?

You must start taking Tamiflu within 2 days of flu symptoms developing. This ensures that the medicine is effective.

  • Take Tamiflu twice daily, allowing 12 hours between each dose.
  • Take Tamiflu for 5 days. You must complete the full course
  • Take capsules with or without food. But food may help to prevent digestive side effects.

If you miss a dose, do not take a double dose to make up for it. Simply skip the missed dose and take the next dose at the regular time.

Are there any side effects?

Like all prescription medicines, the Tamiflu pill may cause side effects. The most common side effects should go away on their own once your body gets used to the medicine.

Common side effects (up to 1 in 10 people):

  • feeling dizzy
  • stomach discomfort
  • cold sores
  • feeling or being sick
  • sleep disorders
  • vertigo (spinning sensation)

Speak to your doctor as soon as possible if you experience any persistent or serious side effects. If you experience any rare side effects such as swelling of the face or mouth or difficulty breathing, please seek emergency medical attention.

For a full list of side effects, please refer to the patient information leaflet (PIL) which comes in the box with your medicine.

Is Tamiflu safe?

Yes, Tamiflu is a safe and clinically-proven treatment for the flu (influenza) when used as directed. Our doctors review every consultation to make sure it’s suitable for you.

Can I get Tamiflu without a prescription?

No, Tamiflu is not available without a prescription. Our doctors will only prescribe treatment if you meet the criteria in your online consultation.

A prescription from a trusted healthcare provider like 121doc ensures:

  • safety during treatment
  • effective results
  • monitoring of side effects

Is Tamiflu an antibiotic?

No, Tamiflu contains Oseltamivir, a particular type of antiviral called a neuraminidase inhibitor. Antibiotics are medicines used to treat bacterial infections and do not work for influenza.

How long are you contagious with the flu after taking Tamiflu?

You are contagious with the flu 1 day before symptoms develop until about 7 days after becoming ill, even if you take Tamiflu. So, make sure you prevent spreading the flu by washing your hands often, covering coughs and sneezes and staying home where possible.

Medical review byDr. Caroline FontanaLast review 28 November 2025
Dr. Caroline Fontana

Note: You must complete a short online consultation so that our doctor can ensure that the treatment is suitable for you. The above pricing should only be used as a reference. The final decision to issue this treatment lies with the prescribing doctor.

Tamiflu Overview

Type of medicine: Antiviral
Used for: Influenza
Active ingredient: Oseltamivir
Works by: Preventing virus from spreading to allow your immune system to fight off the infection
Effective within: 5 days
Available as: Capsules
Available dosages: 75 mg
Usage instructions: Two capsules a day for 5 days
Packaging: Cardboard carton containing foil blister packs of tablets
Manufacturer Roche
Generic available No

FAQs

What is included in the online consultation?
Will a doctor review my consultation?
What happens after I submit my order?
What services are included with my order?
Is the price all-inclusive?
What are my delivery options?
Is it safe to buy prescription medication online?
Is this service discreet?
What is included in the online consultation?

Our online consultations are in the format of short medical questionnaires. You will be asked general questions about your health and medical history, as well as specific medical questions relevant to the treatment you have chosen. We will also ask you for your payment and delivery details to complete the order.

Online consultations take no longer than 5 minutes to complete. All questions are necessary when issuing prescription medicines. It means that our doctors can make sure the treatment is safe and right for you.

Will a doctor review my consultation?

Yes, it is a legal requirement that all online consultations are reviewed by a registered doctor. This is to make sure the chosen treatment is safe and right for you to take. All personal information is stored securely and confidentially.

Please note, all orders are subject to doctor approval, and we cannot guarantee that your order will be approved.

What happens after I submit my order?

Your online consultation will be sent directly to our medical team, where it will be reviewed by on of our in-house doctors.

If a doctor approves you for treatment, they will issue a prescription. Your prescription will then be forwarded to our pharmacist, where you medication will be dispensed and dispatched for delivery.

What services are included with my order?

Every order includes:

  • Free consultation - your consultation will be personally reviewed by one of our registered doctors.
  • Free prescription - a doctor will issue you a prescription if approved for treatment.
  • Free delivery - we provide free express delivery across Europe, you should receive your order in 1-2 working days.
Is the price all-inclusive?

Yes, our service is all-inclusive and there are no hidden fees. All 121doc orders include a free online consultation, a free prescription and free express delivery.

What are my delivery options?

We offer several delivery options at no extra charge:

  • Next-day delivery
  • UPS Access Point - convenient parcel drop-off and collection near your home or work address
  • Nominated-day delivery - choose the most convenient day for delivery

All these options can be tracked and require a signature on delivery. If you are not in, a friend or relative can sign in your place.

Is it safe to buy prescription medication online?

It is safe to buy prescription medications online from genuine and reputable healthcare providers, like 121doc.

Our medical staff and facilities are registered with the relevant medical governing bodies. We also ensure your data is protected by adhering to European data privacy laws.

You can learn more about our certifications here.

Is this service discreet?

Our patients’ privacy is of utmost importance. All your medical information is securely stored and only viewed by our doctors. We do not share your details with third-parties. We are also closely adhere to data privacy laws.

All orders will only show on invoices, bank statements, etc. as ‘HHC Ltd’.

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As soon as you place the order, one of our doctors will review your consultation. On working days, this usually takes around one hour.

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If the doctor has any additional questions, you will receive a phone call and an email. We understand you might be at work or busy. Our customer service representatives are always discreet and can call back at a more convenient time if necessary.

Our emails never contain any personal or medical information, only a link to your private account on our website (where you will find your messages).

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Once our pharmacy receives your prescription, you will get a second email with your package tracking code.

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All orders include next-day delivery. Alternatively, you can select a delivery date that suits you better.

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We also provide a free UPS Access Point service. Pick up your package from one of many collection points across the UK.

With your tracking code, you will know the estimated delivery time. All we need is your signature (or a friend‘s or relative’s).

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All parcels are plainly labelled; there is no logo or any indication of its contents. Inside, you will find your treatment as well as a patient leaflet in your chosen language.

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