A Study of 5 Fluorouracil and the Anti-Tumor Activity of ADH300004 and 5 Fluorouracil in Subjects With Incurable Solid Tumors

Inclusion Criteria: * Signed written informed consent * \> or = 18 years of age * Advanced or metastatic solid tumors: Part 1: Histologically proven advanced or metastatic solid tumors refractory to standard therapy or for which no standard therapy exists Part 2: Histologically proven advanced and/or metastatic solid tumor of one of the following 6 histologies, that is refractory to standard curative therapy or for which no curative therapy exists: HCC, NSCLC, gastric cancer, cervical cancer, prostate cancer, and breast cancer * Radiologically documented measurable or evaluable (non-measurable) disease * Adequate performance status and organ function, as evidenced by hematologic and biochemical blood testing * Willing to not receive fluoropyrimidine containing chemotherapy for 8 weeks after the last dose of ADH300004 in this study Exclusion Criteria: * Cytotoxic chemotherapy, radiotherapy, or investigational drug within 28 days prior to study entry * Non-cytotoxic cancer therapy within 14 days prior to study entry * Portal hypertension with bleeding esophageal or gastric varices within the past 3 months * Ascites that is refractory to conservative management * Inability to take oral medication * Active peptic ulcer disease * Known hypersensitivity to 5-FU or ADH300004 * Stroke, major surgery, or other major tissue injury within 30 days before study entry