Evaluation of Food Effect on Pharmacokinetics of Vismodegib

PRIMARY OBJECTIVES: I. To evaluate the effect of prandial states on the pharmacokinetic parameters of GDC-0449 (vismodegib). II. To evaluate the effect of fat content of meals on the pharmacokinetic parameters of GDC-0449. SECONDARY OBJECTIVES: I. To evaluate the effect of prandial states and fat content of meals on the safety profile of GDC-0449. II. To describe any anticancer activities of GDC-0449. OUTLINE: Patients are randomized to 1 of 3 treatment arms. ARM I: Patients receive a single dose of vismodegib orally (PO) on an empty stomach. Beginning 7 days later, patients receive vismodegib PO on an empty stomach daily on days 1-28. ARM II: Patients receive a single dose of vismodegib PO after eating a high fat meal. Beginning 7 days later, patients receive vismodegib PO on an empty stomach daily on days 1-28. ARM III: Patients receive a single dose of vismodegib PO after eating a low fat meal. Beginning 7 days later, patients receive vismodegib PO after eating a meal daily on days 1-28. In all arms, treatment repeats every 28 days for 2 courses in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up for 30 days.