Safety Study of TAK-559 in Treating Subjects With Type 2 Diabetes Mellitus

Inclusion Criteria: * Required sponsor approval if older than 80 years. * Had either: * Successfully completed Protocol 01-03-TL-559-016, or * Participated in either Protocol 01-02-TL-559-013, 01-02-TL-559-014, 01-04-TL-559-028, or 01-04-TL-559-029 and either * completed the study * prematurely terminated from the study due to the HbA1c withdrawal criterion after at least 12 weeks of treatment, or * in the opinion of the investigator, demonstrated a lack of efficacy after at least 16 weeks of treatment and was withdrawn from the study. * A female subject of childbearing potential who was sexually active agreed to use adequate contraception, and was neither pregnant nor lactating from Screening throughout the duration of the study. * Were willing to continue following an individualized weight maintenance diet during the study period. * Had evidence of insulin secretory capacity, as demonstrated by a fasting C-peptide concentration of greater than or equal to 1.5 ng/mL (0.50 nmol/L) at the prior visit of Protocol 013, 014, 016, 028, or 029. * Were willing to perform daily self-monitoring blood glucose tests. * Were in good health at Enrollment, as determined by a physician at the final visit of Protocol 013, 014, 016, 028, or 029 (ie, via medical history and physical examination), other than having type 2 diabetes mellitus and New York Heart Association Classification I or II congestive heart failure. * Had clinical laboratory evaluations (including clinical chemistry, hematology, and complete urinalysis after fasting for at least 8 hours) within the normal reference range for the testing laboratory, unless the results were deemed not clinically significant by the investigator or sponsor, at the prior visit of Protocol 013, 014, 016, 028, or 029. * Had a normal thyroid-stimulating hormone level of less than 5.5 uIU/mL (5.5 mIU/L) and greater than or equal to 0.35 uIU/mL (0.35 mIU/L) at the prior visit of Protocol 013, 014, 016, 028, or 029. Exclusion Criteria: * Had significant cardiovascular disease, including, but not limited to, New York Heart Association Classification III or IV CHF at Enrollment. * Had a planned surgical or catheter intervention for coronary angioplasty within 12 months after the Enrollment Visit. * Had a systolic blood pressure greater than 140 mm Hg or a diastolic blood pressure greater than 95 mm Hg at Enrollment. * Had symptomatic orthostatic hypotension or systolic blood pressure less than 90 mm Hg at Enrollment. * Had a history of a clinically significant abnormal electrocardiogram or experienced any cardiovascular event including, but not limited to, myocardial infarction, coronary angioplasty or bypass graft, unstable angina pectoris, transient ischemic attacks, or documented cerebrovascular accident during Protocol 013, 014, 016, 028, or 029. * Had a creatine phosphokinase value above 3 times the upper limit of normal at the prior visit of Protocol 013, 014, 016, 028, or 029. * Had a triglyceride level greater than 500 mg/dL (5.6 nmol/L) at the prior visit of Protocol 013, 014, 016, 028, or 029. * Had an alanine aminotransferase or aspartate aminotransferase level above 3 times the upper limit of normal, active liver disease, or jaundice at any time during Protocol 013, 014, 016, 028, or 029. * Had donated and/or received any blood products within 3 months prior to Enrollment. * Had used illicit drugs or abused alcohol during participation in Protocol 013, 014, 016, 028, or 029. * Had experienced another illness occurring at the same time requiring hospitalization during the occurring at the same time 3 weeks before the Enrollment Visit. * Had experienced any other serious disease or condition during participation in Protocol 013, 014, 016, 028, or 029 that might have affected life expectancy or made it difficult to successfully manage and follow the patient according to the protocol. * Was required to take or intended to continue taking any disallowed medication, prescription medication, herbal treatment or over-the counter medication that may interfered with the evaluation of the study medication, including: * insulin (for patients who participated in Protocol 01-02-TL-559-013, 01-02-TL-559-014, 01-04-TL-559-028, and 01-04-TL-559-029) * prescription-strength niacin * fibric acid derivatives * systemic corticosteroids * warfarin * rifampin * nicotinic acid * St. John's Wort * thiazolidinediones * peroxisome proliferator-activated receptor agonists other than the study drug. * Had experienced persistent unexplained microscopic or macroscopic hematuria or developed cancer of the bladder while participating in Protocol 013, 014, 016, 028, or 029.