- The effects of gemcitabine+cisplatin 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) prior to study entry and for the duration of study treatment. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately. Female patients of child bearing potential must indicate to their physician that they are not pregnant at the time of enrollment or have a negative serum pregnancy test.