- No history of any of the following conditions within 6 months before initiating study treatment: diabetes mellitus requiring treatment with insulin or TZD agents; myocardial infarction with significant impairment of cardiac function; severe/unstable angina pectoris; coronary/peripheral artery bypass graft; New York Heart Association (NYHA) class III or IV congestive heart failure; malabsorption syndrome, chronic diarrhea (lasting > 4 weeks), inflammatory bowel disease, or partial bowel obstruction.