Zombie Eyes: What Causes Dark Circles Under Eyes And 6 Foods To Erase Them. Whether you have a full night of shut-eye or havenât slept in 24 hours, you find yourself plagued with dark circles. Concealers, eye creams, and eye exercises seldom tone down the shadowy effect of the dark or blue-black tints under your eyes. Now, before you succumb to the tall tales of an infomercial product, itâs important to know first what causes them.
Why Acyclovir Helps Cold Sores. Zovirax (Acyclovir 5 percent cream) is also FDA-approved for the treatment of recurrent cold sores. In studies, frequent application of the cream reduced the time to healing by about 12 hours.
Most cold sores respond best to oral or topical prescription treatments (some cases require both at the same time), but there are over-the-counter alternatives, too. Oral prescription drugs used to treat cold sores are Zovirax (acyclovir), Famvir (famciclovir), and Valtrex (valacyclovir).All of these work by interrupting virus replication in the first few days of an outbreak.ost cold sores respond best to oral or topical prescription treatments (some cases require both at the same time), but there are over-the-counter alternatives, too. Oral prescription drugs used to treat cold sores are Zovirax (acyclovir), Famvir (famciclovir), and Valtrex (valacyclovir).