Antiviral Drug for Treating the Cold Sore Virus

This page is the CodyCross answer for the clue below from World of Books, Group 296, Puzzle 3 (Digital Gallery).

Question is: Antiviral Drug for Treating the Cold Sore Virus

and the answer is: ACYCLOVIR

Word Meaning:

ACYCLOVIR — (pharmacology) US and UK spelling of aciclovir.

Definitions from Wiktionary.