Zovirax (Acyclovir Injection)

Name: Zovirax (Acyclovir Injection)

What are some side effects that I need to call my 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 doctor or get medical help right away if you have 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.
  • Change in the way you act.
  • Mood changes.
  • Feeling confused.
  • Hallucinations (seeing or hearing things that are not there).
  • Seizures.
  • Shakiness.
  • Very bad and sometimes deadly kidney problems have happened with Zovirax. Call your doctor right away if you are unable to pass urine or if you have blood in the urine or a change in the amount of urine passed.
  • Very bad and sometimes deadly blood problems like thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS) have happened with this medicine in some people. Call your doctor right away if you feel very tired or weak or have 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.

What are some other side effects of Zovirax?

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

  • Upset stomach or throwing up.
  • Dizziness.
  • Feeling sleepy.
  • Feeling tired or weak.
  • 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 doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.

If OVERDOSE is suspected

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.

How do I store and/or throw out Zovirax?

  • Store at room temperature.
  • Store in a dry place. Do not store in a bathroom.
  • Most of the time, Zovirax 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.
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