Lypsyl Cold Sore Gel 3g Symptomatic relief of cold sores. Colourless gel containing: Lidocaine hydrochloride 2 %w/w Zinc sulphate 1 %w/w Cetrimide 0.5 %w/w Dosage: Over 12 years: using a clean fingertip, apply small amount to affected area 3-4 times daily. Under 12 years: not recommended except on medical advice.