Xerese is a prescriptioncold soretreatment medication that reduces the size of lesions and speeds up the healing time required for them. It also prevents initial cold sores from becoming ulcerative. A cold sore is ulcerative when it bursts and becomes a painful sore, but most people who use Xerese can stop the virus (herpes simplex) from progressing that far. Xerese cream for cold sores is easy to apply and is recommended for people who don't get sufficient relief from cold sores from OTC products like Anbesol. You can Xerese cream with a prescription at most pharmacies, and you'll likely have a lower Xerese cream cost when you order medication online from Canada Pharmacy.