This cold sore cream contains the active ingredient Aciclovir (an antiviral medication). It tries to stop the virus that causes cold sores, stalling their growth, so your skin heals faster.

Cold sores are tiny blisters containing fluid that develop on or near your mouth and lips. Usually, they occur if you're suffering from an infectious virus such as simplex. You catch this if someone else has a cold sore. If a cold sore begins to form, you'll typically feel an itching or tingling sensation then blisters will emerge. Normally, a cold sore will heal itself within 10 days. However, to speed up the healing, creams such as Aciclovir reduce the irritation until the symptoms subside. 

If you're taking other medicines such as any you're taking without a prescription, get in touch with your pharmacist or GP prior to applying this cold sore cream. Several medications interact if used together, which may lessen the effectiveness of Aciclovir cold sore cream or lead to undesirable side effects. So, seek medical assistance before using this product. 

Get in touch with your pharmacist or GP before applying this cold sore cream if you're pregnant or breastfeeding. The active ingredient in this cold sores medication may transfer into breast milk, so it may not be the most suitable cold sore treatment. Speak to your GP if you're suffering from cold sores during pregnancy or breastfeeding and they will advise an alternative medication.