Drugs Associated With Reactivation
Since immunodeficiency causes this virus to progress to PML, immunosuppressants are contraindicative to those infected.
The boxed warning for the drug rituximab (Rituxan, co-marketed by Genentech BioOncology and Biogen Idec) includes a statement that JC virus infection resulting in progressive multifocal leukoencephalopathy, and death has been reported in patients treated with the drug.
The boxed warning for the drug natalizumab (Tysabri, marketed by Elan and developed by Biogen Idec) includes a statement that JC virus resulted in progressive multifocal leukoencephalopathy developing in three patients who received natalizumab in clinical trials.
The boxed warning was added on Feb. 19, 2009, for the drug efalizumab (Raptiva, marketed in the U.S. by Genentech, and marketed in Europe by Swiss drugmaker Merck Serono) includes a statement that JC virus, resulting in progressive multifocal leukoencephalopathy, developed in three patients who received efalizumab in clinical trials. The drug was pulled off the U.S. market because of the association with PML on April 10, 2009.
A boxed warning for brentuximab vedotin (Adcetris) was issued by the FDA on January 13, 2011 after two cases of PML were reported, bringing the total number of associated cases to three.
Read more about this topic: JC Virus
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