system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Ganciclovir is preferred over acyclovir in the following condition:
assistant
The correct answer is  * Ganciclovir is the drug of choice for CMV infections. * Acyclovir is highly effective against Herpes simplex and Varicella zoster (chicken pox and herpes zoster) but it has very little activity against CMV.