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U.S. Department of Health and Human Services


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Ancobon (flucytosine) 250 mg and 500 mg Capsules

Detailed View: Safety Labeling Changes Approved By FDA Center for Drug Evaluation and Research (CDER) -- May 2009


The detailed view includes drug products with safety labeling changes to the BOXED WARNING, CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, ADVERSE REACTIONS, or PATIENT PACKAGE INSERT/MEDICATION GUIDE sections. Deletions or editorial revisions made to these sections are not included in this summary.


Summary View



Pregnancy: Teratogenic Effects/ Pregnancy Category C

  •  Studies in pregnant rats have shown that fluocytosine injected intraperitoneally crosses the placental barrier.



  • including hepatic necrosis
  • enterocolitis


  • and fatal cases of bone marrow aplasia