Inclusion Criteria:  Previous diagnosis of cystic fibrosis (CF) or chronic pancreatitis (CP). Previous diagnosis of exocrine pancreatic insufficiency (EPI) that is currently clinically controlled. Total Symptom Score (TSS) < 1.8 on Pancreatic Exocrine Insufficiency Questionnaire (PEI-Q) at Screening.  Exclusion Criteria:  - Malignancy involving the digestive tract in the last 5 years, or other significant disease or medical condition that may interfere with EPI symptom assessment.