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Natalizumab carries a boxed warning for which condition?
Liver damage
PML
Heart failure
Severe infections
The correct answer is: PML
Natalizumab carries a boxed warning for progressive multifocal leukoencephalopathy (PML). PML is a rare but serious brain infection caused by the JC virus. This warning is included due to the risk of developing PML while taking Natalizumab. Liver damage, heart failure, and severe infections are not the specific boxed warning associated with Natalizumab.