- It is used to treat herpes infections.
- It is used to treat cold sores.
- It is used to treat chickenpox.
- It may be given to your child for other reasons. Talk with the doctor.
- If your child has an allergy to this drug or any part of this drug.
- If your child is allergic to any drugs like this one or any other drugs, foods, or other substances. Tell the doctor about the allergy and what signs your child had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- Tell all of your child’s health care providers that your child is taking this drug. This includes your child’s doctors, nurses, pharmacists, and dentists.
- Do not give this drug to your child for longer than you were told by the doctor.
- If your child is taking this drug for cold sores, it will not cure cold sores. Talk with the doctor.
- This drug is not a cure for herpes infections. Talk with the doctor.
If your child is or may be sexually active:
- If your child has genital herpes, this drug will not stop it from spreading. Be sure your child does not have any kind of sex when any sores or other signs of genital herpes are present. Genital herpes can also be spread if your child does not have any signs. Be sure your child does not have any kind of sex without using a latex or polyurethane condom. Talk with the doctor.
If your child is pregnant or breast-feeding a baby:
- Talk with the doctor if your child is pregnant, becomes pregnant, or is breast-feeding a baby. You will need to talk about the benefits and risks of using this drug.
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of kidney problems like unable to pass urine, change in how much urine is passed, blood in the urine, or a big weight gain.
- Feeling confused.
- Change in the way your child acts.
- Mood changes.
- Hallucinations (seeing or hearing things that are not there).
- Trouble speaking.
- Shakiness, trouble moving around, or stiffness.
- Very bad and sometimes deadly blood problems like thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS) have happened with this drug in some people. Call your child’s doctor right away if your child feels very tired or weak or has any bruising or bleeding; dark urine or yellow skin or eyes; pale skin; change in the amount of urine passed; change in eyesight; change in strength on 1 side is greater than the other, trouble speaking or thinking, or change in balance; or fever.
- Upset stomach or throwing up.
- Feeling tired or weak.
- Belly pain.
If your child has menstrual periods:
- Period (menstrual) pain.
- Give this drug with or without food. Give with food if it causes an upset stomach.
- Have your child drink lots of noncaffeine liquids every day unless told to drink less liquid by your child’s doctor.
- If your child is taking this drug to treat cold sores, chickenpox, shingles, or genital herpes, give this drug as soon as you can after your child’s signs start. This drug may not help if your child starts taking it too late.
- Keep giving this drug to your child as you have been told by your child’s doctor or other health care provider, even if your child feels well.
- A liquid (suspension) can be made if your child cannot swallow pills. Talk with your child’s doctor or pharmacist.
- Shake well before use.
- Measure liquid doses carefully. Use the measuring device that comes with this drug. If there is none, ask the pharmacist for a device to measure this drug.
- Give a missed dose as soon as you think about it.
- If it is close to the time for your child’s next dose, skip the missed dose and go back to your child’s normal time.
- Do not give 2 doses at the same time or extra doses.
- Store at room temperature.
- Store in a dry place. Do not store in a bathroom.
- Store liquid (suspension) in a refrigerator. Throw away any part not used after 28 days.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
- If your child’s symptoms or health problems do not get better or if they become worse, call your child’s doctor.
- Do not share your child’s drug with others and do not give anyone else’s drug to your child.
- Keep a list of all your child’s drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your child’s doctor.
- Talk with your child’s doctor before giving your child any new drug, including prescription or OTC, natural products, or vitamins.
- Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your child’s doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.