Desuden fandtes rosiglitazon ikke gentoxisk i en række af in vivo og in vitro genotoxicitetsstudier, og der var ikke nogen evidens på colontumorer i livstidsstudier af rosiglitazon hos to gnaverarter.
In addition, rosiglitazone was not genotoxic in a battery of in vivo and in vitro genotoxicity studies and there was no evidence of colon tumours in lifetime studies of rosiglitazone in two rodent species.