Virasolve works in three ways: Antiviral to fight virus. Antibacterial to help prevent bacterial infection. Anaesthetic to ease pain and itching. For the relief of symptoms of cold sores and fever blisters. Best results are obtained by treating the infection early. Active Ingredients: Each gram contains: IDOXURIDINE 5mg, LIGNOCAINE HYDROCHLORIDE 20mg, BENZALKONIUM CHLORIDE 5mg, (Contains Chlorocresol 1mg/g as preservative). Dosage: Cover the infected area with a thin layer of Virasolve. Repeat the application every hour on day 1 and then every 4 hours on subsequent days until the cold sore disappears. Virasolve contains a local anaesthetic to help reduce pain and itching associated with cold sores. Warnings: For external use only Do not use during pregnancy and breastfeeding Do not continue usage if reness or swelling worsens