Phase I evaluation of 2'-fluoro-5-iodo-1-beta-D-arabinofuranosylcytosine in immunosuppressed patients with herpesvirus infection. Academic Article uri icon



  • 2'-Fluoro-5-iodo-1-beta-D-arabinofuranosylcytosine (FIAC) is a potent selective inhibitor of the replication of herpes simplex virus types 1 and 2 (HSV-1, HSV-2), varicella zoster virus, and cytomegalovirus in cell culture systems. FIAC produces an unequivocal therapeutic effect in mice that have been inoculated with a lethal burden of HSV-1. We have administered FIAC to 32 host compromised patients, 30 with advanced cancer, who were experiencing acute herpesvirus infections (varicella zoster, 29; HSV-1, 2; HSV-2, 1); the drug was given by 20 min i.v. infusion twice a day for 7 days. The dosage levels explored were 60, 120, 240, 400, and 600 mg/sq m/day. Drug-induced myelosuppression became evident at 600 mg/sq m/day; thrombocytopenia exceeded leukopenia. The toxic low dose was 400 mg/sq m/day with mild nausea and rare myelosuppression. All 24 varicella zoster patients with cutaneous disease receiving FIAC, greater than or equal to 120 mg/sq m/day, experienced stabilization of cutaneous lesions within 48 to 72 hr; healing began promptly thereafter.

publication date

  • October 1, 1983



  • Antiviral Agents
  • Cytarabine
  • Herpesviridae Infections
  • Immunosuppression


Scopus Document Identifier

  • 0020529124

PubMed ID

  • 6309380

Additional Document Info


  • 43


  • 10