Oseltamivir

About oseltamivir

Oseltamivir works by preventing influenza viruses A and B from spreading inside the body. By doing this it reduces or prevents the symptoms of the influenza virus infection. As well as relieving the symptoms of flu, it also shortens the time of illness by around one day and reduces the risk of other problems that can occur alongside flu, such as pneumonia.

It is most effective in reducing the symptoms of flu if it is started within a few hours of the first symptoms of the infection. It can however be started up to 48 hours after the start of the infection.

It is also used to prevent flu when there are high levels of influenza in the community such as in epidemics and pandemics. It is useful for those who have been in close contact with people suffering from influenza at these times, or those who would be at particular risk if they developed flu.

Oseltamivir is not a substitute for seasonal flu vaccination.

Before taking oseltamivir

Before taking oseltamivir make sure your doctor or pharmacist knows:

• If you are pregnant, trying for a baby or breast-feeding.
• If you have kidney problems.
• If you are taking other medicines, including those available to buy without a prescription, herbal or complementary medicines.
• If you have ever had an allergic reaction to this or any other medicine.

How to take oseltamivir

• Before beginning treatment, read the manufacturer's printed information leaflet.
• Take oseltamivir exactly as directed by your doctor. Follow the dosing instructions on the pack carefully.
• Oseltamivir is a course of treatment which usually lasts 5-10 days although it may sometimes be taken for longer periods. Remember to complete the whole course (even if you do not feel unwell), otherwise the symptoms may return.
• Take oseltamivir with a drink of water. You can take it with or without food, although it is recommended to take it with food to reduce the chance of feeling or being sick.
• Try to take oseltamivir at the same times each day to avoid missing any doses.
• If you forget to take a dose, take one as soon as you remember unless it is time for your next dose in which case skip the missed dose. Do not take two doses at the same time to make up.

1. Shake the bottle well before using.
2. Push the plunger of the oral dispenser fully down to the tip.
3. Remove the cap from the bottle of oral suspension.
4. Insert the tip of the dispenser into the bottle adapter.
5. Turn the bottle (with the dispenser attached) upside down.
6. Slowly pull out the plunger of the dispenser to the graduation which marks the dose you need.
7. Turn the bottle (with the dispenser attached) upright.
8. Slowly remove the dispenser from the bottle.
9. Push the suspension directly into your (or your child's) mouth by pushing down the plunger of the dispenser and then swallow the medicine.
10. Immediately after administration, take the dispenser apart and rinse both parts of the dispenser under running tap water.

Getting the most from your treatment

• If your influenza symptoms get worse or the fever continues, speak with your doctor.
• To stop the spread of flu to others it is important to follow good hygiene practices. Remember to use clean tissues to cover your mouth and nose when you cough and sneeze, bin the tissues after use and regularly wash your hands with soap and hot water.

Can oseltamivir cause problems?

Along with their useful effects all medicines can cause unwanted side effects which usually improve as your body adjusts to the new medicine. Speak with your doctor or pharmacist if any of the following side effects continue or become troublesome.

If you experience any other symptoms which you think may be due to this medicine, speak with your doctor or pharmacist.

How to store oseltamivir

• Keep all medicines out of the reach and sight of children.
• The oral suspension (when reconstituted) can be stored for 10 days at room temperature or 17 days if it is refrigerated. Do not use the suspension after this time.
• Store in a cool, dry place, away from direct heat and light.

Important information about all medicines