AZD2171 and Standard Combination Chemotherapy in Advanced Non-Small Cell Lung Cancer or Colorectal Cancer

RATIONALE: AZD2171 may stop the growth of tumor cells by blocking blood flow to the tumor and by blocking some of the enzymes needed for cell growth. Drugs used in chemotherapy work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Giving AZD2171 together with standard combination chemotherapy may kill more tumor cells.
PURPOSE: This phase I trial is studying the side effects and best dose of AZD2171 when given together with standard combination chemotherapy in treating patients with advanced non-small cell lung cancer (NSCLC) or colorectal cancer.