Cymex Cold Sore Cream 5g is a topical emollient and antiseptic cream licensed for cold sores and cracked lips. It combines urea, dimeticone, cetrimide and chlorocresol to soften dry skin, protect the affected area and provide local disinfectant action. Medicines.org.uk

Cymex Cold Sore Cream 5g is a topical cream for cold sores and cracked lips. It contains urea 1% w/w, dimeticone 350 9% w/w, cetrimide 0.5% w/w and chlorocresol 0.1% w/w. Urea helps soften and smooth dry skin, dimeticone forms a protective water-repellent barrier, while cetrimide and chlorocresol provide mild antiseptic activity. The cream should be applied sparingly every hour as needed. Available through Dock Pharmacy, a legitimate, established GPhC-registered UK pharmacy.

Benefits

Cymex helps address several practical problems associated with cold sores and cracked lips. Urea softens rough, dry skin, while dimeticone helps protect the affected area from water loss and environmental irritation. Cetrimide and chlorocresol provide local disinfectant activity. Medicines.org.uk
Because it is licensed for both cold sores and cracked lips, it may be particularly useful where the affected skin is dry, split or uncomfortable rather than when antiviral action is the main treatment priority.

How to Use

Apply a small amount sparingly to the affected area every hour as needed. Use only on the skin. Medicines.org.uk
Wash your hands before and after application, particularly when treating a cold sore, to reduce the risk of spreading the virus to other areas or other people.
If symptoms persist despite treatment, consult your doctor or pharmacist. Medicines.org.uk

Side Effects

The current SmPC lists no specific common adverse effects, but the patient leaflet notes that cetostearyl alcohol may cause local skin reactions such as inflammation and redness, including contact dermatitis. Medicines.org.uk
Stop using the cream and seek advice if you develop persistent redness, swelling, worsening irritation or another suspected allergic reaction.

Cautions

Do not use Cymex if you are allergic to urea, cetrimide, dimeticone, chlorocresol or any other ingredient. It is for external use only. Medicines.org.uk
Avoid contact with the eyes and do not apply inside the mouth. If symptoms persist, seek medical advice.
The current SmPC states that no hazardous medicine interactions are considered likely. If you are pregnant or breastfeeding, the leaflet advises consulting a doctor before use. Medicines.org.uk
Store below 25°C and keep out of the sight and reach of children. Medicines.org.uk

Why Choose Dock Pharmacy UK?

Cold sore products differ significantly in how they work. Some are antivirals, while Cymex relies on skin protection, softening and disinfectant action, so choosing the right type of treatment matters.
Dock Pharmacy is a legitimate, established GPhC-registered UK pharmacy, providing access to regulated over-the-counter products and professional pharmacist support.
Dock Pharmacy currently lists the exact Cymex Cold Sore Cream 5g product with its verified four-active-ingredient formulation.

FAQ

What is Cymex Cold Sore Cream 5g used for?
It is licensed for cold sores and cracked lips. Medicines.org.uk
What are the active ingredients in Cymex Cream?
It contains urea 1%, dimeticone 9%, cetrimide 0.5% and chlorocresol 0.1%. Medicines.org.uk
How does Cymex Cold Sore Cream work?
Urea softens dry skin, dimeticone protects the skin surface, and cetrimide plus chlorocresol provide disinfectant activity. Medicines.org.uk
Is Cymex an antiviral cream?
No. Cymex does not contain aciclovir or penciclovir. It works through barrier, skin-softening and antiseptic actions.
How often can I apply Cymex Cream?
Apply it sparingly every hour as needed. Medicines.org.uk
Can Cymex be used on cracked lips?
Yes. Cracked lips are specifically included in the authorised indication. Medicines.org.uk
Can children use Cymex?
Yes. The SmPC includes children among the patient groups for whom it can be used. Medicines.org.uk
Can Cymex cause skin irritation?
It can. Cetostearyl alcohol may cause local redness, inflammation or contact dermatitis in some people. Medicines.org.uk
Does Cymex Cold Sore Cream require a prescription?
No. It is a General Sales List medicine.
No prescription required – pharmacist support available. Medicines.org.uk
Where can I buy Cymex Cold Sore Cream 5g in the UK?
Dock Pharmacy currently lists the exact Cymex Cold Sore Cream 5g, subject to stock availability. Dock Pharmacy

Cymex Cold Sore Cream 5g is a UK over-the-counter topical treatment for cold sores and cracked lips. Its four active ingredients work in complementary ways: urea has keratolytic properties, dimeticone acts as a water-repellent barrier, cetrimide is a disinfectant and chlorocresol is a mild disinfectant. The cream can be applied sparingly every hour when required.