Study Evaluating the Addition of Fulvestrant to Erlotinib in Stage IIIB/IV Non-Small Cell Lung Cancer

Upon enrollment, patients will continue to receive erlotinib daily orally at 150 mg/day or at 100 mg/day if 150 mg was associated with adverse events requiring dose reduction before enrollment in this study. Doses less than 100 mg/day will not be allowed. Fulvestrant will be added intramuscularly 500 mg Day 0, 250 mg Days 14 and 28. In cycles 2 and up, fulvestrant will be given 250 mg on day 28. Patients will receive this therapy until they progress.