April 27, 2017
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Zovirax Patient Information Including Side Effects

Brand Names: Zovirax

Generic Name: acyclovir (oral) (Pronunciation: a SYE klo veer)

What is acyclovir (Zovirax)?

Acyclovir is an antiviral drug. It slows the growth and spread of the herpes virus so that the body can fight off the infection. Acyclovir will not cure herpes, but it can lessen the symptoms of the infection.

Acyclovir is used to treat infections caused by herpes viruses. Illnesses caused by herpes viruses include genital herpes, cold sores, shingles, and chicken pox.

Acyclovir may also be used for purposes other than those listed in this medication guide.

Acyclovir 200 mg-APO

capsule, blue/white, imprinted with APO, 042

Acyclovir 200 mg-PAR

capsule, blue, imprinted with G, 0034

Acyclovir 200 mg-PP

oval, green, imprinted with R 605

Acyclovir 200 mg-RAN

capsule, white, imprinted with RX652

Acyclovir 200 mg-SCH

capsule, white, imprinted with Zenith 4266, 200

Acyclovir 200 mg-TEV

capsule, blue, imprinted with N 940, 200

Acyclovir 200 mg-UDL

capsule, blue, imprinted with N 940, 200

Acyclovir 200 mg-WAT

capsule, blue/turquoise, imprinted with WATSON, Acyclovir 200

Acyclovir 200 mg-ZEN

capsule, white, imprinted with Zenith 4266, 200

Acyclovir 400 mg-APO

oval, white, imprinted with LOGO 5306

Acyclovir 400 mg-NOV

oblong, blue, imprinted with N 943, 400

Acyclovir 400 mg-PAR

pentagonal, white, imprinted with G 0036

Acyclovir 400 mg-PP

round, white, imprinted with 606, R

Acyclovir 400 mg-RAN

oval, white, imprinted with RX504

Acyclovir 400 mg-TEV

oval, blue, imprinted with N943, 400

Acyclovir 400 mg-WAT

oblong, white, imprinted with WATSON 335

Acyclovir 400 mg-ZEN

round, white, imprinted with Hourglass Logo 4267, 400

Acyclovir 800 mg-APO

oval, white, imprinted with AX5307

Acyclovir 800 mg-PP

oval, green, imprinted with R607

Acyclovir 800 mg-SCH

oval, white, imprinted with ACY 800

Acyclovir 800 mg-TEV

oval, white, imprinted with N947, 800

Acyclovir 800 mg-WAT

oblong, white, imprinted with WATSON 336

Acyclovir 800 mg-ZEN

oval, white, imprinted with Hourglass Logo 4268, 800

Zovirax 400 mg

hexagonal, white, imprinted with ZOVIRAX, LOGO

What are the possible side effects of acyclovir (Zovirax)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

  • pain in your lower back;
  • urinating less than usual or not at all;
  • easy bruising or bleeding; or
  • unusual weakness.

Less serious side effects may include:

  • nausea, vomiting, diarrhea, loss of appetite, stomach pain;
  • headache, feeling light-headed; or
  • swelling in your hands or feet.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the Zovirax (acyclovir) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about acyclovir (Zovirax)?

Take this medication for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated.

Treatment with acyclovir should be started as soon as possible after the first appearance of symptoms (such as tingling, burning, blisters).

Herpes infections are contagious and you can infect other people, even while you are being treated with acyclovir. Avoid letting infected areas come into contact with other people. Avoid touching an infected area and then touching your eyes. Wash your hands frequently to prevent passing the infection to others.

Side Effects Centers

Zovirax - User Reviews

Zovirax User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Zovirax sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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