- Participants will receive bevacizumab intravenously every 2 weeks. They will also receive trastuzumab and vinorelbine intravenously once a week. Therefore, treatments will alternate between receiving all three drugs (1st week, third week, fifth week, etc.) and receiving only trastuzumab and vinorelbine (2nd week, fourth week, sixth week, etc.) A treatment cycle lasts four weeks.