Tamiflu is used to treat flu symptoms caused by influenza virus.


Tamiflu general information

Tamiflu is used to treat flu symptoms caused by influenza virus in patients who have had symptoms for less than 2 days. Tamiflu may also be given to prevent influenza in people who may be exposed but do not yet have symptoms. Oseltamivir will not treat the common cold.

Before taking Tamiflu, tell your doctor if you have received a nasal flu vaccine within the past 2 weeks, or if you have kidney disease, heart disease, lung disease, or any other serious disease or health problem. Also tell your doctor if you have any condition causing swelling or disorder of the brain.

Tamiflu dosage and administration

Take Tamiflu exactly as your doctor has prescribed it for you. Do not take more of the medication than recommended. Do not take Tamiflu for longer than your doctor has prescribed

Treatment with Tamiflu should start as soon as possible when flu symptoms appear, such as fever, chills, muscle aches, sore throat, and runny or stuffy nose.

Take the capsule with a full glass of water. Shake the oral suspension (liquid) well just before you measure a dose. To be sure you get the correct dose, measure the liquid with the syringe provided with the medicine. Do not measure the medicine with a regular table spoon. If you do not have the syringe or another medicine dose-measuring device, ask your pharmacist for one.

You may take Tamiflu with or without food. If the medicine upsets your stomach, it may help to take it with food or milk.

To treat flu symptoms: Take every 12 hours for 5 days.

To prevent flu symptoms: Take every 24 hours for 10 days or as prescribed. Follow your doctor's instructions.

Tamiflu side effects

Stop using Tamiflu and get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat; a red and blistering or peeling skin rash. Some people using oseltamivir have had rare side effects of sudden confusion, delirium, hallucinations, unusual behavior, or self-injury. These symptoms have occurred most often in children. It is not known whether Tamiflu was the exact cause of these symptoms. However, anyone using this medicine should be watched closely for signs of confusion or unusual behavior. Call a doctor at once if you or the child using Tamiflu has any of these symptoms.

Less serious Tamiflu side effects may include:

  • nausea, vomiting, diarrhea;

  • dizziness, headache;

  • nosebleed;

  • eye redness or discomfort;

  • sleep problems (insomnia); or

  • cough or other respiratory symptoms.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.