This treatment contains the agent Zanamivir and is used to treat flu (influenza A and B). It is effective at combatting symptoms in cases where the sufferer has been ill with the condition for two days or less. The treatment is dispensed through a diskhaler, whereby the medicine is inhaled in powder form through a small and simple-to-use device (similar to a regular inhaler). While it is not a substitute for the flu vaccine, this medication has also shown to be effective at preventing flu before it can occur in individuals who have been exposed to someone already infected.

If you are showing the initial symptoms of flu, or have been in prolonged contact with someone infected with the virus, you can buy Relenza from Express Doctor by clicking below and proceeding to our online consultation and prescription process.

Relenza 5mg5 Pieces£6074.77 €Proceed to Consultation

This medication comes with very specific application instructions which must be carefully followed. If you are unsure, consult your doctor. Relenza is not suitable for patients who are breastfeeding or suffer from asthma, and may not be suitable for patients who are pregnant. There are a number of allergies and medical conditions which preclude the use of this medication. Ensure you disclose your full medical history to your prescriber before you buy and take this treatment.

Side effects may include skin rashes, respiratory problems, dehydration, fever or behavioural changes. The information provided here is not comprehensive. For a full list of side effects, restrictions and safety information, consult the leaflet provided or ask your prescriber. If you become unwell or display signs of an allergic reaction while using this treatment, seek medical advice immediately.

What is included in the price shown on the website?


No Prescription Required

You will be presented with a medical questionnaire written by our doctor. The price you pay includes a UK registered doctor to review your answers and issue you a valid prescription.

Prescription Processing

Once your order has been approved by our doctor, your prescription will be forwarded to a UK registered pharmacy responsible for dispensing your medication. To view one of our partner pharmacies’ registration details click here.

Discreet Secure Packaging

A UK registered pharmacy will dispense your medicines and place them in secure plain packaging. All medicines are sealed in tamper proof secure bags.

24 Hour Next Day delivery – Fully Tracked Secure Delivery

Our partner pharmacies only use fully tracked couriers. In most cases your medicines will be sent using TNT. You will be sent a tracking number once the pharmacy has shipped your medicine so you can track the parcel whilst its on its way to you. All medicines are sent via a ‘guaranteed next day delivery’ service.

Same Day Despatch For 24 Hour Delivery

If your order has been approved by our doctor by 4pm (GMT/UK time), then this order will be dispensed by our partner pharmacy on the same day and you will receive your medicines the next working day. Please note that TNT do not deliver on weekends. All deliveries will require a signature, therefore if you are aware of not being home the next day, please provide an alternative delivery address when placing your order.

Dedicated Customer Service

We are here to help! If your require any further information or help in ordering, please do not hesitate to contact us on 0203 239 8452 or you can email us on

Important Information


  • Powder oral inhalation (disk inhaler)


  • Inform the doctor if you have any allergic reactions to Zanamivir
  • Inform the doctor if you have any respiratory conditions like asthma, or COPD
  • Can cause dizziness so avoid driving or machine operation after use


  • Nausea
  • Sinusitis
  • Diarrhea
  • Allergic reactions (swelling of lips, appearance of rashes, difficulty of breathing)
  • Rare cases of delirium and confusion