UPDATED 15:09 PM EST, December 19, 2012
CAMBRIDGE, Mass. (AP) — The Food and Drug Administration is attaching a black box warning to the Vertex Pharmaceuticals hepatitis C treatment Incivek over a potentially fatal rash.
The FDA says patients taking the pill in combination with two other treatments should stop immediately if they develop a rash that grows worse or comes with symptoms like a fever, diarrhea or mouth sores.
Patients taking this drug can develop a rash that covers more than half the body.
