- Pregnant or lactating women are ineligible. A pregnancy test will be performed on each fertile premenopausal female 2 weeks prior to entry into the study. Treatment may not begin until the results of the pregnancy test are ascertained. All patients (men and women) must agree to use medically approved contraceptive measures for at least 4 weeks before starting therapy, during therapy, and for at least 3 months after therapy has stopped.