Dosage of Tamiflu

What is the Proper Dosage of Tamiflu?

Taking the proper recommended dosage of Tamiflu is extremely important in individuals of all ages.  This antiviral drug slows down the spread of the influenza virus in the cells of the individual’s body by chemically cutting the ties it has created with its host.  It was first introduced in 1999 and has been used to treat and prevent both influenza virus A and B.

Oseltamivir is the chemical in Tamiflu and although it is not effective by itself, once it is in the liver, it goes through a natural chemical conversion process to actively produce carboxylate.  It is a neuraminidase inhibitor that acts as a competitive inhibitor in regards to sialic acid that are found in the host’s cells.  By blocking this viral activity, new particles are unable to be released.

Who Can Take Tamiflu?

Under supervision, the proper dosage of Tamiflu is considered safe for most individuals.  It is FDA-approved for flu prevention and treatment in individuals above the age of one year old.  It is available as a capsule or as a fruit flavored liquid in a dosing dispenser.  You cannot take Tamiflu if you are allergic to oseltamivir phosphate. You should tell your doctor if:

  • You are either pregnant or nursing.  The effects of Tamiflu on a fetus or a nursing infant are not yet known.  If you are planning to become pregnant in the near future, this needs to be discussed as well before you take the drug.
  • You have heart, respiratory or kidney disease or if you have any other type of serious health condition.
  • You have received FluMist or any other type of nasally administered virus vaccine in the past two weeks.
  • You have fructose intolerance in your family history.

How to Take Tamiflu

Following the recommended dosage of Tamiflu is extremely important.  For prevention uses, it should be taken one dose every day for 10 days.  For flu treatment, Tamiflu is taken two times per day for five days in a row and it is imperative that you take all of the doses.  It is important to note that one capsule is 75 mg and is standard for individuals 18 years old and up.  The dosage for children depends on weight but on average:

  • Under 33 pounds = 30 mg doses
  • From 34 to 51 pounds = 45 mg doses
  • Between 52 and 88 pounds = 60 mg doses
  • Over 89 pounds = 75 mg doses

If you happen to have problems with your kidney, your doctor may prescribe you a different dosage.  Ideally, treatment will begin within the first 48 hours of experiencing symptoms.  Tamiflu can be taken either with or without food however, most individuals find that here is less stomach upset when taken with milk, a light snack or a meal.

Should you happen to forget a dose, you need to take the missed capsule when you remember.  However, if it is within two hours of your next dosage, skip it and take it at the next scheduled time.  Never take two doses at one time to try and make up for one that you missed.  Should you miss more than one dose, seek advice from your doctor on how you should handle it.

Storage Information

Capsules of Tamiflu should always be stored around 77 degrees Fahrenheit which is average  room temperature and they need to be kept in a place that is dry and out of direct sunlight.  Oral Tamiflu is safely stored in your refrigerator for 17 days.  Do not attempt to freeze!  It does not have to be refrigerated though, if you prefer to keep it at room temperature you can do so for 10 days.  Always keep Tamiflu in a safe place where children cannot get to it.

Administering Oral Tamiflu

The dosage for oral suspension needs to be precise as they are  regulated by the child’s weight.  If the child spits some out and you give another full dose, this could be dangerous.  It is important to follow directions and use the provided dispenser.

If Tamiflu liquid is unavailable, you may be instructed to use a certain amount of an opened capsule mixed with a sweetened liquid.  Only administer this type of dosage of Tamiflu under a doctor’s recommendation.