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Tamiflu (Oseltamivir) Capsules

  • Antiviral capsules for treating and preventing influenza (flu)
  • Reduces severity and duration of flu symptoms
  • Suitable for adults, children, and infants including newborns
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Fast & Free Delivery Options

Variety of delivery options including next day & free delivery.

100% UK-based Pharmacy

Pharmacy, clinic and prescribers based in Greater Manchester.

Free Online Consultations

Start your treatment with a quick and free online consultation.

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About Tamiflu Capsules

Tamiflu Capsules contain oseltamivir, a neuraminidase inhibitor used to treat and prevent influenza (flu) in adults, adolescents, children, and infants, including full-term newborns. Tamiflu works by stopping the flu virus from spreading inside the body, reducing the severity and duration of flu symptoms such as fever, cough, runny nose, headaches, muscle aches, and fatigue.

Tamiflu is suitable for patients who have been exposed to the flu or are experiencing symptoms during influenza outbreaks and may be prescribed in exceptional circumstances for prevention during pandemics.

Tamiflu Capsules are available in:

  • Tamiflu 75 mg Hard Capsules – 10 capsules
Medication Name Tamiflu Capsules
Active Ingredient Oseltamivir 75 mg per capsule
Other Ingredients Sodium stearyl fumarate, povidone, maize starch, croscarmellose sodium, gelatin, titanium dioxide (E171), iron oxide yellow (E172), iron oxide red (E172)
Medication Form Hard capsules
Used to Treat Treatment and prevention of influenza (flu)
Available Sizes 10 capsules per pack
Who Can Use It Adults, adolescents, children, and infants (including full-term newborns)
Prescription Required? Yes – Prescription only medicine (POM)
Patient Information Leaflet Tamiflu Capsules – Patient Information Leaflet

What Is Tamiflu Used For?

Tamiflu is used to treat influenza (flu) by reducing the spread of the virus and alleviating symptoms. It can also be used to prevent flu after exposure, especially during outbreaks or in high-risk individuals.

Who Is Tamiflu Suitable For?

Tamiflu is suitable for adults, adolescents, children, and infants, including full-term newborns.

Do not take Tamiflu if you:

  • Are allergic to oseltamivir or any other ingredient in the capsules

Consult your doctor before use if you:

  • Have kidney problems
  • Have a weakened immune system
  • Have chronic heart or lung conditions
  • Are pregnant or breastfeeding
  • Take other medicines such as methotrexate, chlorpropamide, probenecid, or phenylbutazone

How to Use Tamiflu

  1. Take exactly as prescribed by your doctor.
  2. Swallow capsules whole with water; do not crush or chew.
  3. For treating flu: one capsule twice daily for 5 days (10-day course if immune system is weak).
  4. For preventing flu: one capsule daily for the duration advised by your doctor.
  5. Start treatment as soon as possible, ideally within 48 hours of symptom onset.

Possible Side Effects of Tamiflu

Common side effects:

  • Nausea and vomiting
  • Diarrhoea
  • Headache

Uncommon/Rare side effects:

  • Neuropsychiatric effects, such as mood or behaviour changes (especially in children)
  • Seizures or hallucinations (very rare)

Warnings and Precautions

  • Do not exceed the prescribed dose.
  • Inform your doctor if you experience unusual behaviour or mood changes.
  • Use caution in patients with kidney problems; dose adjustment may be necessary.
  • Tamiflu is not a substitute for the flu vaccine.

Storage Instructions

  • Store below 30°C in the original packaging.
  • Keep capsules in a dry place, away from light.
  • Keep out of reach of children.

Tamiflu (Oseltamivir) Capsules Reviews

Our Experienced UK-based Pharmacy Team

Clinical Consultant
MUDr, MRCEM, EBCEM, FRCEM
GMC no. 7176414

Pharmacist
MPharm
GPhC no. 2065469

Pharmacist
MPharm
GPhC no. 2046514

Page content authored by Amjad Khan, last reviewed by Mr Muhammad on 27th January 2026.

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