Aciclovir - Topical

Patient Medicine Information
Why do I need this medicine?
Aciclovir is used to treat viral infections such as cold sores and genital herpes caused by herpes virus.
How do I use this medicine?
Apply Aciclovir exactly as directed by your doctor or according to the instructions on the label. Do not use more or less than instructed by your doctor.

This medicine is available as a cream or as an ointment. If you are using the cream, follow these steps:
  1. Wash your hands.
  2. Clean and dry the affected area before application.
  3. Rub the cream gently on the skin until it disappears. Do not cover, wrap or bandage the area unless instructed by the doctor.
  4. Wash your hands after using.
  5. Replace the cap of the tube. 
If you are using the ointment, follow these steps:
  1. Wash your hands.
  2. Clean and dry the affected area before application.
  3. Rub the ointment gently on the skin until it disappears. Use a rubber glove or finger cot when applying the ointment to avoid spreading the infection. Do not cover, wrap or bandage the area unless instructed by the doctor.
  4. Wash your hands after using.
  5. Replace the cap of the tube. 
Avoid contact with the eyes or the inside of the mouth. Rinse immediately with water if this medicine gets into your eyes or mouth. Alert your doctor if you start to have any problems with your eyes.

Avoid unnecessarily rubbing of the affected area to avoid aggravating or transferring the infection.

The dose of this medicine will be decided by your doctor. Your doctor will advise you on the treatment timeframe depending on the type and severity of your infection.

Your doctor will also discuss the use of this medicine as different brands and preparations of Aciclovir may only be used for a specific condition. It can either be used to treat cold sores or genital infections, or for both conditions.

Do not use this medicine for any conditions other than what is prescribed by your doctor.

Aciclovir must be used at regular intervals for it to be effective. Continue using this medicine even when you feel better. Do not stop using it unless instructed by the doctor.
What should I do if I have forgotten to use this medicine?
Apply the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and return to your normal dosing schedule.

Do not use more than what is instructed by the doctor to make up for the missed dose.

If you often forget to use your medicine, let your doctor and pharmacist know.
When should I not use this medicine?
Inform your doctor if you have a weak immune system.

Do not use this medicine if you ever had an allergic reaction (rashes, breathlessness, swollen face) to Aciclovir or any similar medicines such as valaciclovir.
What should I take note of while using this medicine?
Let your doctor know if you are pregnant or breastfeeding. Avoid breastfeeding if you have herpes sores on or near your breast.

Be sure to check with your doctor or pharmacist before giving Aciclovir to a child.

Aciclovir does not reduce your risk of passing herpes infections. Ensure that you use proper precautions to avoid spreading the infection to others.

If you are going for dental work, inform your dentist that you are using this medicine.
What side effects could I experience?
Aciclovir may cause any of the following side effects: dry or cracked lips, dry or flaking skin and local burning, stinging or itching.

If you develop rashes, breathlessness, swollen mouth or eyes, stop using the medicine and inform your doctor immediately. These could be signs of an allergic reaction.

Inform your doctor if any of these side effects do not go away or are severe, or if you experience other side effects.
Can I use this with other medicines?
Always notify your doctor and pharmacist if you are taking any other medicines, including herbal tonics such as traditional Chinese medicines, supplements and medicines that you buy without a prescription.
What special dietary instructions should I follow?
Avoid alcohol.
How should I store this medicine?
Store in a cool, dry place away from the reach of children.

Medicines must not be used past the expiry date.
This information is independently developed by MIMS based on Aciclovir - Topical and is provided for your reference only. It is not a replacement for and should only be used in conjunction with full consultation with a licensed healthcare professional, the information provided by your pharmacist and/or the manufacturer of the medication. It may not contain all the available information you require and cannot substitute professional medical care, nor does it take into account all individual circumstances. Although great effort has been made to ensure content accuracy, we shall not be held responsible or liable for any claims or damages arising from the use or misuse of the information contained herein, its contents or omissions, or otherwise. Copyright © 2022 MIMS. All rights reserved. Powered by
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