- In the Food and Drug Administration (FDA) Use-in-Pregnancy Ratings for Drugs, cisplatin and gemcitabine are classified as category D drugs, indicating that investigational or postmarketing data show risk to the fetus. For this reason, women of childbearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, for the duration of study participation, and for 30 days after completion of study. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately. Because there is a risk for AEs in nursing infants secondary to treatment of the mother with these drugs, breastfeeding should be discontinued while the patient is on this trial and for 30 days after completion of treatment on this trial.