OBJECTIVES:
Primary
* Determine the maximum-tolerated dose of the combination of gemcitabine hydrochloride, capecitabine, and erlotinib hydrochloride in patients with advanced pancreatic cancer.
Secondary
* Analyze the limiting toxicities according to CTC.
* Analyze the toxicity according to CTC.
* Determine the recommended dose.
* Determine the pharmacokinetic dosages of the three drugs.
* Analyze interactions between the drugs.
OUTLINE: This is a multicenter study.
Patients receive one course of chemotherapy comprising gemcitabine hydrochloride IV over 30 minutes on days 1, 8, and 15, oral capecitabine twice daily on days 1-21, and oral erlotinib hydrochloride once daily on days 1-28.