- The effects of nano liposomal irinotecan on the developing human fetus are unknown. For this reason, women of child-bearing potential and men must agree to use adequate contraception: hormonal or barrier method of birth control; abstinence, etc. prior to study entry, for the duration of study participation, and for 6 months post drug administration. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately