Not all cold sore treatments are alike. Unlike other over-the-counter products, Abreva penetrates deep into the skin where the cold sore starts. Viruses can only reproduce if they can get inside healthy cells. Only Abreva helps to block the cold sore virus from entering healthy cells. And Abreva is the only OTC treatment approved by the FDA to shorten both healing time and symptom duration. Learn more about our products at abreva.com.