Zevalin bør ikke anvendes til patienter, der kan være overfølsomme (allergiske) over for ibritumomab, yttriumchlorid, museproteiner eller andre af indholdsstofferne.
Zevalin should not be used in people who may be hypersensitive (allergic) to ibritumomab, yttrium chloride, mouse proteins or any of the other ingredients.