Compeed Cold Sore Patch (15 Patches) Up to 12 hours of freedom from your cold sore COMPEED Invisible Cold Sore Patch delivers up to 12 hours of continuous treatment to heal fast and significantly reduce scabbing compared to anti-viral creams. And, because it acts like a virus shield, the patch reduces the risk of contamination from the cold sore. At Selles Medical, we always order in fresh pharmaceuticals. This can often delay an order by a further 48 hours. It is in the best interest of all customers that we supply the freshest stock that is available featuring the longest expiry dates.