- CPT-11 is known to have teratogenic potential and may be excreted in milk; the current SU5416 Investigator's Brocure indicates that teratogenicity studies have not yet been performed; however, other antiangiogenesis drugs, such as thalidomide, are known to have teratogenic potential; based on the available data, there is potential for significant risk to a developing fetus or breast-feeding child; therefore, pregnant women, women who are breast-feeding, and fertile men and women, unless utilizing birth control are excluded from this study; a negative pregnancy test must be documented during the screening period for women of childbearing potential