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Drug

Acyclovir

Pronounced

"ay-SYE-kloe-vir"

Uses

This medication is used to treat the first outbreak of genital herpes infection. It is also used to treat non-life-threatening herpes infections of the skin and around the mouth (cold sores) in people with a weakened immune system. This medication may decrease the length of time you have pain and help the sores heal faster. Acyclovir is an antiviral drug. It stops the growth of certain viruses.

This medication does not cure herpes or prevent the infection from coming back. Also, it does not prevent the spread of herpes to others.

Other antiviral medications taken by mouth may be more effective in treating these conditions. Discuss your treatment options with your doctor.

How to Use This Medication

Apply this medication to skin only. Avoid getting this medication in your eyes. If this happens, wash right away with plenty of water.

Begin using acyclovir as soon as symptoms of a herpes infection appear. Wash your hands with soap and water before and after using this medication. Clean and dry the affected areas before applying the medication. Use a finger cot or rubber glove when applying acyclovir to prevent spreading the infection to other parts of your body and to other people. Apply enough ointment to cover all sores as directed by your doctor, usually every 3 hours, 6 times a day. Continue to use this medication for the full time prescribed.

Tell your doctor if your condition does not get better after 7 days of treatment or if it gets worse.

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Drug information is selected from data included with permission and copyrighted by First DataBank, Inc. This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your healthcare professional. Always seek the advice of your healthcare professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your healthcare professional. This information does not contain any assurances that this product is safe, effective or appropriate for you.

This information is intended only for residents of the United States. Products sold under the same brand names in other countries may contain different ingredients.

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Information expires December 2025.