Ganciclovir
Ganciclovir has also been used with some success in treating "Human herpesvirus 6" infections.
Roseolovirus
Like the other herpesviruses (Epstein Barr virus, varicella zoster virus, etc.), HHV-6 establishes lifelong latency and can become reactivated later in life. This reactivation has been associated with many clinical manifestations. Reactivation can occur in locations throughout the body, including the brain, lungs, heart, kidney and gastrointestinal tract. In some cases, HHV-6 reactivation in the brain tissue can cause cognitive dysfunction, permanent disability and death.