5- FU) klastogent på humane lymfocytter (in vitro), og der var et positivt trend i in vivo mikronukleustesten på mus.
However, similar to other nucleoside analogues (ie, 5-FU), capecitabine was clastogenic in human lymphocytes (in vitro) and a positive trend occurred in mouse bone marrow micronucleus tests (in vivo).