Det aktive stof i Xeloda, capecitabin, er et cytotoksisk lægemiddel (dvs. det dræber celler, der deler sig, f. eks. kræftceller) og tilhører gruppen af antimetabolitter (stofskiftehæmmere).
The active substance in Xeloda, capecitabine, is a cytotoxic medicine (a medicine that kills cells that are dividing, such as cancer cells) that belongs to the group ‘ anti-metabolites’.