title: I'm troubled by recurrent fever blisters. They seem to come on anytime, even if I don't have a cold. Is there anything I can do to prevent them?
mesh_terms: D000212:Acyclovir / Q000031:analogs & derivatives / Q000627:therapeutic use; D000998:Antiviral Agents / Q000627:therapeutic use*; D006147:Guanine; D006560:Herpes Labialis / Q000188:drug therapy / Q000517:prevention & control*; D006801:Humans
chemical_list: D000998:Antiviral Agents; C053539:penciclovir; D006147:Guanine; D000212:Acyclovir