Inclusion Criteria:

- Advanced or metastatic breast cancer

- Disease that can be measured by the physician or radiologic test.

- May have had one chemotherapy treatment for advanced or metastatic disease.

- Patients may have received any prior adjuvant chemotherapy, including taxane
containing regimens, provided this treatment was completed at least 6 months prior to
enrollment.

- Patients may have received prior hormone therapy or immunotherapy.

Exclusion Criteria:

- Patients with only non-measurable disease

- Cancer that has spread to the brain

- A patient who received a taxane with metastatic disease.

- Pregnancy

- Patients who received prior gemcitabine