Vidarabine Anhydrous

**Semantic type:** Pharmacologic Substance

**Definition:** An anhydrous form of vidarabine, a nucleoside analog with activity against herpes simplex virus and varicella zoster virus. Vidarabine is converted to a monophosphate by viral thymidine kinase and is further modified to a triphosphate form by host enzymes. Vidarabine triphosphate directly inhibits DNA polymerase and also acts as a chain terminator in DNA replication.

**Synonyms:** - 9-beta-D-arabinofuranosyladenine Anyhydrous - Adenine Arabinoside Anhydrous - VIDARABINE ANHYDROUS