Drug General Information (ID: DDIFDAOWXR)
  Drug Name Peginterferon alfa-2a Drug Info Iohexol Drug Info
  Drug Type Interferons Small molecule
  Therapeutic Class Antineoplastics Non-Ionic Iodinated Contrast Media

 Mechanism of Peginterferon alfa-2a-Iohexol Interaction (Severity Level: Major)
     Increased risk of lowers seizure threshold Click to Show/Hide Mechanism Graph
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      Drug Name Peginterferon alfa-2a Iohexol
      Mechanism Lower seizure threshold Lower seizure threshold
      Key Mechanism Factor 1
Factor Name Lowers seizure threshold
Factor Description The combination of medications that lower the seizure threshold is a factor that makes people with epilepsy more likely to have seizures. A seizure is a sudden, uncontrolled electrical disturbance in the brain that can cause changes in your behavior, movements or sensations, and level of consciousness.
      Mechanism Description
  • Increased risk of lowers seizure threshold by the combination of Peginterferon alfa-2a and Iohexol 

Recommended Action
      Management Drugs that can lower the seizure threshold should preferably be withheld for at least 48 hours prior to and 24 hours following intrathecal administration of iodinated contrast media, provided that temporary interruption of therapy does not pose an undue risk to the patient. Otherwise, close monitoring is advised during and after contrast administration.

References
1 Product Information. Isovue-M-200 (iopamidol). Bracco Diagnostics Inc, Princeton, NJ.
2 Product Information. Amipaque (metrizamide) Nycomed Inc, Princeton, NJ.
3 Hindmarsh T, Grepe A, Widen L "Metrizamide-phenothiazine interaction: report of a case with seizures following myelography." Acta Radiol Diagn (Stockh) 16 (1975): 129-35. [PMID: 810000]
4 Product Information. Omnipaque 180 (iohexol). Amersham Health, Princeton, NJ.
5 Product Information. Osmovist 240 (iotrolan). Berlex Canada Inc, Lachine, QC.