Many medications can cause side effects. A side effect is an unwanted response to a medication when it is used in normal doses. Side effects can be mild or severe, temporary or permanent.

The side effects listed below are not experienced by everyone who uses Zovirax Topical (Acyclovir-topical). If you are concerned about side effects, discuss the risks and benefits of Zovirax Topical (Acyclovir-topical) with your doctor.

The following side effects have been reported by at least 1% of people using Zovirax Topical (Acyclovir-topical). Many of these side effects can be managed, and some may go away on their own over time.

Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects.

• contact dermatitis
• itching, stinging, or redness of the genital area
• mild pain, burning, or stinging upon application
• skin rash

Some people may experience side effects other than those listed. Check with your doctor if you notice any symptom that worries you while you are taking Zovirax Topical (Acyclovir-topical).

Each gram of cream contains 50 mg of acyclovir. Nonmedicinal ingredients: cetostearyl alcohol, paraffin, poloxamer, propylene glycol, and sodium lauryl sulfate.

Do not use Zovirax Topical (Acyclovir-topical) if you are allergic to acyclovir, Valacyclovir, or any of the ingredients of the medication.

Tell your doctor or prescriber about all prescription, over-the-counter (non-prescription), and herbal medications that you are taking. Also tell them about any supplements you take. Since caffeine, alcohol, the Nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them. Depending on your specific circumstances, your doctor may want you to:

• stop taking one of the medications,
• change one of the medications to another,
• change how you are taking one or both of the medications, or
• leave everything as is.

An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed.

Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Zovirax Topical (Acyclovir-topical).

Prevention of recurrence: Applying acyclovir topical to areas when no symptoms are present will not prevent the recurrence of infection. Apply acyclovir topical only at the first appearance of a herpes infection episode.

Protection from infection: Current research studies have not shown that the topical form of acyclovir prevents transmission of infection to other persons.

Pregnancy: Zovirax Topical (Acyclovir-topical) should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while using Zovirax Topical (Acyclovir-topical), contact your doctor immediately.

Breast-feeding: Acyclovir, when taken as a tablet or injection, is known to pass into breast milk. No information is available on the amount of acyclovir that may appear in breast milk after using the topical form of acyclovir. If you are a breast-feeding mother and are using acyclovir topical, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of using Zovirax Topical (Acyclovir-topical) have not been established for children.