Acyclovir (Zovirax) is an antiviral topical medication used to treat certain infections caused by the herpes virus, including cold sores on the lips and face, as well as genital herpes. It's FDA approved as a cream for people 12 years and older and as an ointment for adults. You typically apply it 5 to 6 times daily to the affected area. Common side effects include mild skin irritation, burning, or itching at the application site.
Genital herpes in adults - ointment only
Herpes infections in adults with a weakened immune system) - ointment only
Cold sores that keep coming back in people 12 years and older - cream only
Acyclovir (Zovirax) is an antiviral medication, specifically a herpes virus nucleoside analogue. It works by blocking the herpes virus from making new DNA, which stops the virus from multiplying in your body.
Source: DailyMed
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
Mild pain, burning, or stinging
Less common
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Not many interactions with other medications
Applied directly to the affected area
Typically only used for 4 to 7 days
Must be applied multiple times daily
Can cause burning and stinging at the application site
Ointment not FDA approved for children
Acyclovir (Zovirax) works best when you start it as soon as you notice the first signs of an outbreak.
Acyclovir (Zovirax) must be taken several times a day, which can be tough to remember. Setting a phone alarm can help you stay on track.
Wash your hands with soap and water before and after applying acyclovir (Zovirax) to help prevent spreading the infection. You can use a finger cot or rubber glove to lower the risk of spreading the infection to other areas of your body or to other people.
Apply acyclovir (Zovirax) cream only to cold sores on your face and lips. Don’t put it in your eyes, mouth, nose, or genitals.
Avoid using other creams, ointments, or lotions on the same area while using acyclovir (Zovirax). Doing so could make the medication less effective.
Try not to rub or touch the affected area while using acyclovir (Zovirax). This can make the infection worse or spread it to other areas.
Use acyclovir (Zovirax) for exactly as long as your prescriber tells you. Stopping too soon can make your symptoms return.
Acyclovir (Zovirax) won’t cure cold sores or genital herpes, but it can help control outbreaks and shorten healing time.
Acyclovir (Zovirax) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Acyclovir (Zovirax) should only be applied to your skin. The cream, specifically, is meant just for cold sores on your face and lips. Don't put acyclovir (Zovirax) in your eyes, mouth, or nose because this can cause more side effects.
Acyclovir (Zovirax) can cause skin irritation. If this becomes severe or doesn't go away, contact your prescriber.
| Dosage | Quantity | Price as low as | Price per unit | 
|---|---|---|---|
| 5g of 5% | 1 tube | $48.22 | $48.22 | 
Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Allergy to acyclovir (Zovirax) or valacyclovir
Genital herpes in adults - ointment only
Herpes infections in adults with a weakened immune system) - ointment only
Cold sores that keep coming back in people 12 years and older - cream only
Cold sores (herpes labialis)
Genital herpes
Shingles (herpes zoster)
Chickenpox (varicella) in children ages 2 to 17 years old
Cold sores in people age 12 years and older
Genital herpes in adults
Shingles (herpes zoster) in adults
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