It treats cold sores on and around the lips caused by the herpes simplex virus.

It contains 5% aciclovir, an antiviral ingredient.

Start at the first sign of tingling or itching. You can also use it if a blister has already appeared.

Apply it to the affected area five times a day, following the instructions in the pack.

Use it for four full days. If the cold sore has not healed, you can continue for up to 10 days in total. See a doctor if it has not healed after 10 days or gets worse.

Yes. The product leaflet states that it can help speed healing if a cold sore has already appeared.

No. Do not use it inside your mouth or nose, or in your eyes or genital area.

The product leaflet states that it is suitable for all ages. Ask a pharmacist or doctor if you are unsure whether a child has a cold sore.

Cold sores remain infectious during an outbreak. Avoid kissing and sharing items such as towels, and wash your hands before and after applying the cream.

Store it below 25°C and do not refrigerate it. Keep it out of the sight and reach of children.