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Acyclovir (Systemic) (ay SYE kloe veer)

Pediatric Medication

Brand Names: U.S.

Zovirax

Brand Names: Canada

Apo-Acyclovir; Mylan-Acyclovir; Nu-Acyclovir; ratio-Acyclovir; Teva-Acyclovir; Zovirax

What is this drug used for?

  • It is used to treat or prevent herpes infections.
  • It is used to treat chickenpox.
  • It may be given to your child for other reasons. Talk with the doctor.

What do I need to tell the doctor BEFORE my child takes this drug?

  • 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.
This drug may interact with other drugs or health problems.
Tell the doctor and pharmacist about all of your child’s drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for your child to take this drug with all of their drugs and health problems. Do not start, stop, or change the dose of any drug your child takes without checking with the doctor.

What are some things I need to know or do while my child takes this drug?

  • Tell dentists, surgeons, and other doctors that your child is using this drug.
  • 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. 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.

What are some side effects that I need to call my child’s doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your child’s doctor or get medical help right away if your child has any of the following signs or symptoms that may be related to a very bad side effect:
  • 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 or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
  • Change in the way your child acts.
  • Mood changes.
  • Hallucinations.
  • Seizures.
  • Shakiness.
  • Chills.
  • Sore throat.
  • Very bad and sometimes deadly kidney problems have happened with this drug. Call the doctor right away if your child is unable to pass urine, has blood in the urine, or has a change in the amount of urine passed.
  • A very bad and sometimes deadly blood problem called thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS) has happened with this drug in some people. Call the doctor right away if your child has any bruising or bleeding; feels very tired or weak; has 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 that is greater than the other, trouble speaking or thinking, or change in balance; or fever.

What are some other side effects of this drug?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your child’s doctor or get medical help if any of these side effects or any other side effects bother your child or do not go away:

All products:

  • Headache.
  • Upset stomach or throwing up.
  • Loose stools (diarrhea).
  • Feeling tired or weak.

Shot:

  • Irritation where the shot is given.
These are not all of the side effects that may occur. If you have questions about side effects, call your child’s doctor. Call your child’s doctor for medical advice about side effects.
You may report side effects to your national health agency.

How is this drug best given?

Give this drug as ordered by your child’s doctor. Read and follow the dosing on the label closely.

All products:

  • To gain the most benefit, do not miss giving your child doses.
  • Give as you have been told, even if your child feels well.
  • Have your child drink lots of noncaffeine liquids every day unless told to drink less liquid by your child’s doctor.

All oral products:

  • Give this drug with or without food. Give with food if it causes an upset stomach.
  • If your child was given this drug for an infection that came back, start it as soon as you can.

Liquid (suspension):

  • Shake well before use.
  • Measure liquid doses carefully. Use the measuring device that comes with this drug. If there is none, get an oral syringe, a dropper, a spoon, or a cup (only for older children) from your pharmacist.

Shot:

  • It is given as a shot into a vein.
  • Your child’s doctor may teach you how to give the shot.
  • Follow how to use carefully.
  • Do not use if the solution is cloudy, leaking, or has particles.
  • Do not use if solution changes color.
  • Throw away needles in a needle/sharp disposal box. When the box is full, follow all local rules for getting rid of it. Talk with a doctor or pharmacist if you have any questions.

What do I do if my child misses a dose?

  • 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.

How do I store and/or throw out this drug?

All oral products:

  • Store at room temperature.
  • Store in a dry place. Do not store in a bathroom.

Liquid (suspension):

  • Protect from light.

Shot:

  • Most of the time, this drug will be given in a hospital or doctor’s office. If stored at home, follow how to store as you were told by the doctor.

All products:

  • Keep all drugs out of the reach of children and pets.
  • Check with your pharmacist about how to throw out unused drugs.

General drug facts

  • 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, 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.

Consumer Information Use and Disclaimer

This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from the healthcare provider. You must talk with the healthcare provider for complete information about the risks and benefits of using this medicine.

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