Ganciclovir
Ganciclovir has also been used with some success in treating "Human herpesvirus 6" infections.
Herpes labialis
Despite no cure or vaccine for the virus, a human body's immune system and specialty antigens typically fight the virus. Docosanol, a saturated fatty alcohol, is a safe and effective topical application that has been approved by the United States Food and Drug Administration for herpes labialis in adults with properly functioning immune systems. It is comparable in effectiveness to prescription topical antiviral agents. Due to its mechanism of action, there is little risk of drug resistance. The duration of symptoms can be shortened a bit if an antiviral, anesthetic, zinc oxide or zinc sulfate cream is applied soon after it starts.