patients with cytomegalovirus

500mg Tablets for cytomegalovirus


Consumer Medicine Information

What is in this leaflet

Please read this leaflet carefully before you start Zelitrex tablets.

This leaflet answers some common questions about Zelitrex tablets. It does not contain all the available information. It does not take the place of talking to your doctor or pharmacist.

All medicines have risks and benefits. Your doctor has weighed the risks of you taking Zelitrex tablets against the benefits this medicine is expected to have for you.

If you have any concerns about taking this medicine, ask your doctor or pharmacist.

Keep this leaflet with the medicine. You may need to read it again.

What Zelitrex tablets is used for

Zelitrex tablets belong to a group of medicines called antivirals.

Zelitrex tablets are used to prevent cytomegalovirus (CMV) infection and disease, following solid organ transplantation. CMV is another type of herpes virus. It can cause symptoms similar to glandular fever (high temperature, sore throat and swollen glands). Zelitrex tablets can help prevent CMV infection and herpes simplex infections.

Ask your doctor if you have any questions about why Zelitrex tablets have been prescribed for you.

Zelitrex tablets are not addictive.

Zelitrex tablets are available only with a doctor's prescription.

Before you take it

When you must not take it

Do not take Zelitrex tablets if you have ever had an allergic reaction to valaciclovir, aciclovir or any of the ingredients listed at the end of this leaflet. Symptoms of an allergic reaction may be mild or severe. They usually include some or all of the following: wheezing, swelling of the lips/mouth, difficulty in breathing, hayfever, lumpy rash ("hives") or fainting.

Do not take Zelitrex tablets if you are pregnant, trying to become pregnant or breastfeeding, unless your doctor says you should. Your doctor will discuss the risks and benefits of using Zelitrex tablets when pregnant and during breastfeeding.

Do not take Zelitrex tablets after the expiry date (EXP) printed on the pack. If you take them after the expiry date has passed, they may not work as well.

Do not take Zelitrex tablets if the packaging is torn or shows signs of tampering.

If you are not sure whether you should be taking Zelitrex, talk to your doctor.

Before you start to take it

You must tell your doctor if:

  • you are allergic to foods, dyes, preservatives or any other medicines.
  • you have or have ever had blood disorders.
  • you have a kidney or liver condition.
  • you are pregnant or plan to become pregnant. Your doctor will discuss the risks and benefits of taking Zelitrex when pregnant.

If you have not told your doctor about any of the above, please do so before you take Zelitrex.

Taking other medicines

Tell your doctor or pharmacist if you are taking any other medicines, including medicines you buy without a prescription from a pharmacy, supermarket or health food shop.

Some medicines may affect the way others work. Mycophenolate mofetil, cylclosporin and tacrolimus are medicines commonly taken by transplant patients and require close attention. These medicines may be affected by Zelitrex or Zelitrex may be affected by these medicines. Your doctor or pharmacist will be able to tell you what to do when taking Zelitrex tablets with other medicines.

Use in children

There is not enough information to recommend the use of Zelitrex in children.

How to take it

Take Zelitrex tablets exactly as your doctor has prescribed. Your doctor or pharmacist will tell you:

  • how many tablets to take at each dose
  • how many doses to take each day
  • when to take your doses each day.

The label on the pack will give the same information. If there is something you do not understand, ask your doctor or pharmacist.

How much to take

If you have been prescribed Zelitrex tablets to prevent CMV infection and disease, the usual dose for adults and children over 12 years of age is four 500mg tablets four times a day for 90 days.

If you have a kidney disease your doctor may reduce your dose.

If you think you have been advised to take a different dose, talk to your doctor or pharmacist.

How to take it

Swallow the tablets with a glass of water.

You should drink plenty of fluids while taking Zelitrex tablets.

When to take it

To prevent CMV infection and disease, the tablets should be taken four times a day (ie. morning, noon, afternoon and evening).

How long to take it

For the prevention of CMV infection and disease, the usual course of treatment is 90 days.

If you forget to take it

If it is almost time for your next dose, skip the dose you missed and take your next dose when you are meant to. Otherwise, take it as soon as you remember, then go back to taking it as you would normally.

Do not take a double dose to make up for the dose that you missed.

If you miss more than one dose, or you are not sure what to do ask your doctor or pharmacist. If you have trouble remembering to take your medicine ask your pharmacist for some hints.

If you take too much (overdose)

Immediately telephone your doctor or Poisons Information Centre (telephone 131126) for advice, if you think you or anyone else may have taken too much Zelitrex, even if there are no signs of discomfort or poisoning. You may need urgent medical attention.

Keep telephone numbers for these places handy.

If you are not sure what to do, contact your doctor or pharmacist.

While you are taking it

Things you must do

Tell your doctor or pharmacist that you are taking Zelitrex tablets if you are about to be started on any new medicines.

Tell your doctor if you become pregnant or are trying to become pregnant or intend to breastfeed while you are taking Zelitrex tablets.

Drink plenty of fluids while you are taking Zelitrex tablets.

Tell your doctor if, for any reason, you have not taken your medicine exactly as prescribed. Otherwise, your doctor may think that it was not effective and change your treatment unnecessarily.

Things you must not do

Do not stop taking Zelitrex tablets, or alter the dose, without first checking with your doctor.

Do not give this medicine to anyone else, even if their symptoms seem similar to yours.

Do not use Zelitrex tablets to treat any other complaints unless your doctor says to.

Side effects

Check with your doctor as soon as possible if you have any problems while taking Zelitrex tablets, even if you do not think the problems are connected with the medicine or are not listed in this leaflet.

Like all medicines, Zelitrex tablets can cause some side-effects. If they occur, they are most likely to be minor and temporary. However, some may be serious and need medical attention.

Do not be alarmed by this list of possible side-effects. You may not experience any of them.

The most commonly reported side-effects in patients taking Zelitrex are:

  • headache
  • gastrointestinal discomfort (vomiting, nausea, diarrhoea, constipation, abdominal pain, indigestion)

These should be reported to the doctor or pharmacist if they are severe or become troublesome.

You should contact your doctor if you experience any of the following side effects which are more common in patients with kidney disease or in those taking high doses of Zelitrex:

  • Hallucinations
  • Confusion
  • Dizziness
  • Drowsiness

gic reactions to Zelitrex are rare. However, if you think you are having an allergic reaction, tell your doctor immediately or go to your casualty department at your nearest hospital. Symptoms usually include some or all of the following:

  • wheezing
  • swelling of the lips/mouth
  • difficulty in breathing
  • hay fever
  • lumpy rash ("hives")
  • fainting

Some rare side-effects of Zelitrex tablets include:

  • unusual bruising or bleeding. Tell your doctor immediately if you notice any bruising or bleeding, as this may indicate that your blood is not clotting properly.
  • sensitivity to UV light, such as development of a rash like sunburn even after short exposure to UV light. Talk to your doctor or pharmacist if you experience this.
  • kidney problems, which get better when Zelitrex treatment is stopped.
  • liver problems, which get better when Zelitrex treatment is stopped.

This is not a complete list of all possible side-effects. Others may occur in some people and there may be some side-effects not yet known.

Tell your doctor if you notice anything else that is making you feel unwell, even if it is not on this list.

Ask your doctor or pharmacist if you don't understand anything in this list or if you have any questions.

After taking it tablets


Keep this medicine where young children cannot reach it. A locked cupboard at least one-and-a half metres above the ground is a good place to store medicines.

Keep Zelitrex tablets in a cool, dry place where it stays below 30°C. Do not store them, or any other medicine, in a bathroom or near a sink.

Do not leave them in the car or on window sills. Heat and dampness can destroy some medicines.

Keep your tablets in their pack until it is time to take them. If you take the tablets out of their pack they may not keep well.


If your doctor tells you to stop taking Zelitrex, or the tablets have passed their expiry date, ask your pharmacist what to do with any tablets left over.

Product description

What it looks like

Zelitrex 500 mg tablets are white, film coated tablet, white to off-white core, biconvex, elongated, unscored engraved with “500” on one side and plain on the other. They are available in a pack size of 100 tablets.


Zelitrex tablets contain the active ingredient valaciclovir. The tablets also contain microcrystalline cellulose, crospovidone, povidone, colloidal anyhydrous silica, carnauba wax, magnesium stearate and white colour concentrate.


Arrow Pharma Pty Ltd
15-17 Chapel Street
Cremorne VIC 3121

Zelitrex 500 mg tablets:
AUST R 128739.

This leaflet was revised in January 2018.

Published by MIMS March 2018


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