Oseltamivir as Phosphate

The information and instructions on the following pages should not replace those given to you by your doctor.

Oseltamivir as Phosphate (Tamiflu) is an antiviral drug belonging to the neuraminidase inhibitor group. Tamiflu is meant to treat and prevent the flu among both children (over the age of one) and adults.

Do not use when

  • Your child has a known allergy to one of the medication’s ingredients
  • Your child is suffering or has suffered in the past from kidney, liver, or urinary tract dysfunction
  • Your child is taking immunosuppressants
  • You are pregnant or nursing

Consult your doctor when

  • Your child is taking other medications
  • Your child has food allergies

How should I store the medication?
Tablets: Keep the tablets in a cool, dry place. Keep closed and out of reach of children.

Syrup: Keep at room temperature or refrigerated. The syrup is good for 10 days.

Do not use past the expiration date.

How to administer the medication
Follow the instructions and times set by your physician. Shake the syrup well prior to each use. If the medication comes in a powder form, have the pharmacist make it into syrup. Your child cannot eat or drink after taking the medication, but we recommend taking the medication with food to lower the chances of developing a stomach ache. Wash the syringe after each use.

Children over the age of one year: The medication should be taken immediately following the appearance of flu symptoms, or if you suspect your child has been exposed to the flu:

Body Weight Recommended Dose for 5 Days Recommended Tablet
< 15 Kilograms 30 mg, 2 times a day 1 capsule, 30 mg
15-23 kilograms 45 mg, 2 times a day 1 capsule, 45 mg
23-40 kilograms 60 mg, 2 times a day
2 capsules, 30 mg
> 40 kilograms 75 mg, 2 times a day 1 capsule, 75 mg or 1 capsule 30 mg + 1 capsule 45 mg.

Do not chew! The tablet must be swallowed with water. In certain cases, and only with your doctor’s permission, can you open the capsule and swallow the contents.

Open the capsule carefully. Pour the contents into a glass or bowl. Add a sweet drink. Mix well and swallow the entire contents of the drink.

Syrup Capsules Syrup
30 mg 2.5 ml
45 mg 3.8 ml
60 mg 5 ml
75 mg 6.3 ml

What should I do if I forgot to give my child his medication on time?
Give him the medication as soon as you remember – unless there are less than two hours until the next dose. Do not give two doses at once.

When can I stop giving my child the medication?
Finish the round as instructed by your physician. Even after your child shows signs of improvement, do not stop treatment without consulting your physician.

Side Effects
Side effects include nausea, vomiting, diarrhea and stomach pains. These side effects are common and generally subside after treatment is over. Less common side effects include dizziness, headaches, drowsiness, difficulty sleeping, bronchitis, bleeding in the digestive system, ear infections, eye infections, pulmonary infections, sinus infections, aggravation of existing asthma, skin rashes and swollen lymph nodes.

Call a doctor when

  • Your child’s condition worsens
  • Your child has an allergic reaction (especially an anaphylactic reaction) – shortness of breath, swelling in the face, chest pains, rapid pulse. Take your child to the ER immediately.
  • Your child experiences side effects such as confusion, hallucinations, seizures or a change in behavior

If your child suffers from kidney failure (ml/min30>CL) – the dose will need to be adjusted accordingly.

Using Tamiflu does not cancel out the need for a flu shot.

Tamiflu does not work against any other types of viruses except the flu.

Children and teenagers are at a higher risk of having seizures, confusion or abnormal behavior during the earlier stages of the virus. Any of these side effects can lead to self-harm so parents are encouraged to go to the doctor if the child begins to exhibit abnormal behavior.