Why is Zovirax cream/ointment prescribed?

Zovirax, with generic name Acyclovir, is a cream/ointment used to treat sores on the face or lips (cold sores/fever blisters), as wells as sores found on the genitals or rectum, caused by a viral infection (Herpes simplex virus).

What does it do?

Acyclovir belongs to a class of medications called synthetic nucleoside analogs, which inhibits the replication of the virus to limit the spread of herpes virus in the body. However, it cannot cure, prevent the outbreak, or spread of infection to other people.

How should I apply it?

Zovirax cream/ointment is currently available as a 5% cream applied directly to the sores or affected skin. Avoid direct contact with eyes, nose, or inside the mouth. In case of contact, rinse the affected area immediately. Do not swallow this medication. If swallowed, immediately contact your doctor.

The dosage strength and frequency depend on every patient’s condition and the doctor’s prescription. It is imperative that you do not self-medicate and only use this drug after consulting with your doctor or pharmacist to determine the best dosage and dosing schedule for the treatment of your condition.

What if I missed a dose?

The desired effects of prescribed medications will only be achieved if used properly. As much as possible, strictly follow your doctor’s prescribed dosing schedule. However, if you miss a dose, apply another one immediately and adjust the time of your next dose depending on your doctor’s advice. Never apply two doses at the same time just to make up for your missed dose.

What are the special precautions before applying Zovirax cream/ointment?

Avoid the use of other topical cosmetic products like lotion, moisturizer, sunscreen, sunblock, or makeup while using this medication.

Inform your doctor about all the medications you are taking. Discuss your current and previous medical history and any allergic reactions to Zovirax cream, or any other ingredients included in the manufacture of this medication.

Inform your doctor if you had any form of surgery or if you are planning to get one.

For the drug label information of Zovirax cream/ointment, click here.

Does it have any side effects?

It is important to note that all drugs have corresponding side effects and adverse reactions. Additional information may be obtained when you ask your doctor or pharmacist.

Common side effects may include:
• Cracked or dry lips
• Dry, flaking, or peeling skin
• Irritation, swelling, redness or burning on the area where the cream is applied

Serious side effects may include:
• Itching
• Hives
• Rash
• Swelling on any part of the face
• Hoarseness
• Difficulty breathing or swallowing

Is it safe to use it with another drug?

Some drug interactions may cause life-threatening reactions when taken with other medications. Immediately inform your doctor if you are using Zovirax cream/ointment with any of the following medications:

• Adefovir
• Amikacin
• Amphotericin B
• Aprotinin
• Bictegravir
• Capreomycin
• Cisplatin
• Colchicine
• Emtricitabine
• Foscarnet
• Fosphenytoin
• Gallium Ga 68 Dotatate
• Gentamicin
• Kanamycin
• Lithium
• Mannitol
• Measles virus vaccine
• Methotrexate
• Paromomycin
• Posaconazole
• Prograf
• Rapamune
• Restasis
• Talimogene laherparepvec
• Tenofovir
• Tobradex
• Rubella virus vaccine
• Vancomycin
• Varicella virus vaccine
• Varicella-zoster virus vaccine

Ask your doctor or pharmacist for other possible interactions not listed within this section.

How should I store it?

Keep Zovirax cream/ointment in its original packaging in a clean environment away from excessive heat and moisture. Keep out of reach of children.

What action should I take in case of overdose?

Immediately call an ambulance and seek immediate medical attention to prevent further complications or possible death.

Is it safe for pregnant or breastfeeding women?

Acyclovir cream is acceptable for use pregnant women, women trying to get pregnant, or are breastfeeding, however, it should only be used if the benefits outweigh the risks associated with the use of this medication. Hence, the potential risks and benefits of using Zovirax cream in pregnant or breastfeeding infants should be carefully considered.

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