I et karcinogenicitetsstudie med rotter blev der hos hunrotter observeret en stigning i godartede tumorer i brystkirtlen (fibroadenom), uterus (polyp) og skjoldbruskkirtlen (C- celle- adenom).
In a rat carcinogenicity study increases in benign tumours of the mammary gland (fibroadenoma), uterus (polyp) and thyroid (C-cell adenoma) were noted in females.