Ganciclovir is preferred over acyclovir in the following condition:
**Core Concept**
Ganciclovir and acyclovir are both antiviral medications used to treat herpesvirus infections. However, they differ in their pharmacokinetic properties and spectrum of activity, making ganciclovir a preferred choice in certain conditions.
**Why the Correct Answer is Right**
Ganciclovir is a nucleoside analog that is active against cytomegalovirus (CMV), which is a herpesvirus that can cause severe infections in immunocompromised patients, such as transplant recipients and HIV/AIDS patients. Ganciclovir has a longer half-life and higher bioavailability than acyclovir, allowing for more effective penetration into the central nervous system (CNS) and other tissues where CMV replicates. Additionally, ganciclovir is more effective against CMV retinitis, a common complication in AIDS patients.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.
**Clinical Pearl / High-Yield Fact**
Ganciclovir is often used in combination with foscarnet for the treatment of CMV retinitis in AIDS patients, as it has been shown to improve outcomes and reduce the risk of recurrence.
**Correct Answer:** C. CMV retinitis in AIDS patients.