- Drug Class
- Antiviral (Guanosine Analog)
- Mechanism of Action (MOA)
- Phosphorylated by viral thymidine kinase → inhibits viral DNA polymerase.
- Clinical Notes
- HSV and VZV (not CMV). Crystal-induced nephrotoxicity — hydrate well. Valacyclovir is the better-absorbed prodrug.
Sources
Reviewed June 2026- FDA label — FDA / DailyMed
Checked against the guideline or standard reference the exam keys to. If it has moved, use Report an error below.
All pharmacology