Alogliptin Benzoate And Pioglitazone Hydrochloride

1 INDICATIONS AND USAGE Alogliptin and pioglitazone tablets are indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus . Alogliptin and pioglitazone tablets are a combination of alogliptin, a dipeptidyl peptidase-4 inhibitor, and pioglitazone, a thiazolidinedione agonist of peroxisome proliferator receptor gamma, indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus. ( 1 ) Limitations of Use: Alogliptin and pioglitazone tablets are not recommended for use in patients with type 1 diabetes mellitus. ( 1 ) Limitations of Use Alogliptin and pioglitazone tablets are not recommended for use in patients with type 1 diabetes mellitus.

2 DOSAGE AND ADMINISTRATION Obtain liver tests prior to initiation. Alogliptin and pioglitazone tablets may be taken with or without food. ( 2.1 ) Individualize the starting dose of alogliptin and pioglitazone tablets based on the patient’s current regimen and concurrent medical condition but do not exceed a daily dose of alogliptin 25 mg and pioglitazone 45 mg. ( 2.2 ) The recommended starting dosage in patients with NYHA Class I or II congestive heart failure is 25 mg of alogliptin and 15 mg of pioglitazone ( 2.4 ) Prior to initiation, assess renal function with creatinine clearance (CrCl) ( 2.3 ) Mild renal impairment (creatinine clearance [CrCl] ≥60 mL/min): same as the recommended dosage in patients with normal renal function. Moderate renal impairment (CrCl ≥30 to <60 mL/min): 12.5 mg of alogliptin and 30 mg of pioglitazone once daily. Severe renal impairment (CrCl ≥15 to <30 mL/min) or ESRD (CrCl <15 mL/min or requiring hemodialysis): not recommended. 2.1 Important Dosage and Administration Information Obtain liver tests (serum alanine and aspartate aminotransferases, alkaline phosphatase, and total bilirubin) prior to initiating alogliptin and pioglitazone tablets [see Warnings and Precautions (5.4) ] . Take alogliptin and pioglitazone tablets orally once daily. Do not split tablets. Alogliptin and pioglitazone tablets may be taken with or without food [see Clinical Pharmacology (12.3) ] . If a dose is missed, do not double the next dose. 2.2 Recommended Dosage and Administration Recommended Starting Dosage Based on Current Regimen Individualize the starting dosage of alogliptin and pioglitazone tablets based on the patient's current regimen and the available strengths of alogliptin and pioglitazone tablets (see Table 1 ). Table 1: Recommended Starting Dosage Based on the Patient’s Current Regimen Current Regimen Starting Dosage of Alogliptin and Pioglitazone Tablets For dosage recommendations for patients with renal impairment and/or congestive heart failure, [see Dosage and Administration (2.3 , 2.4) ] . Not treated with either alogliptin or pioglitazone 25 mg/15 mg or 25 mg/30 mg Alogliptin 25 mg/15 mg or 25 mg/30 mg Pioglitazone 25 mg/15 mg, 25 mg/30 mg, or 25 mg/45 mg Alogliptin and pioglitazone Select a dosage that is as close as possible to the current dosage of alogliptin and pioglitazone Dosage Titration for Additional Glycemic Control Titrate the alogliptin and pioglitazone tablets dosage gradually, as needed, after assessing therapeutic response and tolerability, up to a maximum dosage of 25 mg of alogliptin and 45 mg of pioglitazone once daily. 2.3 Recommended Dosage for Patients with Renal Impairment Assess renal function prior to initiation of alogliptin and pioglitazone tablets and periodically thereafter [see Use in Specific Populations (8.6) ] . The recommended dosage of alogliptin and pioglitazone tablets in patients with mild renal impairment (creatinine clearance [CrCl] ≥60 mL/min) is the same as the recommended dosage in patients with normal renal function [see Dosage and Administration (2.1) ] . The recommended dosage of alogliptin and pioglitazone tablets for patients with moderate renal impairment (CrCl ≥30 to <60 mL/min) is 12.5 mg of alogliptin and 30 mg of pioglitazone once daily. Alogliptin and pioglitazone tablets are not recommended for patients with severe renal impairment (CrCl ≥15 to <30 mL/min) or ESRD (CrCl <15 mL/min or requiring hemodialysis) because these patients require a lower dosage of alogliptin than what is available in the fixed dose combination product, alogliptin and pioglitazone tablets [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.3) ] . 2.4 Recommendations for Congestive Heart Failure Starting Dosage in Patients with NYHA Class I or II Congestive Heart Failure For patients with preexisting NYHA Class I or II congestive heart failure, the recommended starting dosage of alogliptin and pioglitazone tablets is 25 mg of alogliptin and 15 mg of pioglitazone [see Boxed Warning and Warnings and Precautions (5.1) ] . Monitoring for Fluid Retention and Dosage Modifications for Congestive Heart Failure After initiation of alogliptin and pioglitazone tablets or with dosage increase, monitor patients carefully for adverse reactions related to fluid retention as has been seen with pioglitazone (e.g., weight gain, edema and signs and symptoms of congestive heart failure). If congestive heart failure develops while taking alogliptin and pioglitazone tablets, consider discontinuation of alogliptin and pioglitazone tablets or dosage reduction of pioglitazone in alogliptin and pioglitazone tablets [see Boxed Warning and Warnings and Precautions (5.1) ] . 2.5 Coadministration with Strong CYP2C8 Inhibitors The maximum recommended dosage of alogliptin and pioglitazone tablets is 25 mg of alogliptin and 15 mg of pioglitazone once daily when used in combination with gemfibrozil or other strong CYP2C8 inhibitors [see Drug Interactions (7.1) and Clinical Pharmacology (12.3) ] .

6 ADVERSE REACTIONS The following serious adverse reactions are described below or elsewhere in the prescribing information: Congestive Heart Failure [see Boxed Warning and Warnings and Precautions (5.1) ] Pancreatitis [see Warnings and Precautions (5.2) ] Hypersensitivity Reactions [see Warnings and Precautions (5.3) ] Hepatic Effects [see Warnings and Precautions (5.4) ] Edema [see Warnings and Precautions (5.5) ] Fractures [see Warnings and Precautions (5.6) ] Urinary Bladder Tumors [see Warnings and Precautions (5.7) ] Hypoglycemia with Concomitant Use with Insulin or Insulin Secretagogues [see Warnings and Precautions (5.8) ] Macular Edema [see Warnings and Precautions (5.9) ] Severe and Disabling Arthralgia [see Warnings and Precautions (5.10) ] Bullous Pemphigoid [see Warnings and Precautions (5.11) ] The most common adverse reactions (4% or greater incidence) are nasopharyngitis, back pain and upper respiratory tract infection. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Takeda Pharmaceuticals America, Inc. at 1-877-TAKEDA-7 (1-877-825-3327) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Alogliptin and Pioglitazone Over 1,500 patients with type 2 diabetes mellitus have received alogliptin coadministered with pioglitazone in four large, randomized, double-blind, controlled clinical trials [see Clinical Studies (14) ] . The mean exposure to alogliptin and pioglitazone was 29 weeks with more than 100 subjects treated for more than one year. The studies consisted of two placebo-controlled studies of 16 to 26 weeks in duration and two active-controlled studies of 26 weeks and 52 weeks in duration. In the alogliptin and pioglitazone arm, the mean duration of diabetes was approximately six years, the mean body mass index (BMI) was 31 kg/m 2 (54% of patients had a BMI ≥30 kg/m 2 ), and the mean age was 54 years (16% of patients ≥65 years of age). In a pooled analysis of these four controlled clinical studies, the overall incidence of adverse reactions was 65% in patients treated with alogliptin and pioglitazone compared to 57% treated with placebo. Overall discontinuation of therapy due to adverse reactions was 2.5% with alogliptin and pioglitazone compared to 2.0% with placebo, 3.7% with pioglitazone or 1.3% with alogliptin. Adverse reactions reported in ≥4% of patients treated with alogliptin and pioglitazone and more frequently than in patients who received alogliptin, pioglitazone or placebo are summarized in Table 2 . Table 2. Adverse Reactions Reported in ≥4% of Patients Treated with Alogliptin and Pioglitazone and More Frequently than in Patients Receiving Either Alogliptin, Pioglitazone or Placebo Number of Patients (%) Alogliptin and pioglitazone Alogliptin and pioglitazone – includes data pooled for patients receiving alogliptin 25 mg and 12.5 mg combined with pioglitazone 15 mg, 30 mg and 45 mg Alogliptin Alogliptin – includes data pooled for patients receiving alogliptin 25 mg and 12.5 mg Pioglitazone Pioglitazone – includes data pooled for patients receiving pioglitazone 15 mg, 30 mg and 45 mg Placebo N=1533 N=446 N=949 N=153 Nasopharyngitis 75 (4.9) 21 (4.7) 37 (3.9) 6 (3.9) Back Pain 64 (4.2) 9 (2.0) 32 (3.4) 5 (3.3) Upper Respiratory Tract Infection 63 (4.1) 19 (4.3) 26 (2.7) 5 (3.3) Alogliptin Add-On Therapy to a Thiazolidinedione In a 26 week, placebo-controlled, double-blind study, patients inadequately controlled on a thiazolidinedione alone or in combination with metformin or a sulfonylurea were treated with add-on alogliptin therapy or placebo; the adverse reactions reported in ≥5% of patients and more frequently than in patients who received placebo was influenza (alogliptin, 5.5%; placebo, 4.1%). Hypoglycemia In a 26 week, placebo-controlled factorial study with alogliptin in combination with pioglitazone on background therapy with metformin, the incidence of subjects reporting hypoglycemia was 0.8%, 0% and 3.8% for alogliptin 25 mg with pioglitazone 15 mg, 30 mg or 45 mg, respectively; 2.3% for alogliptin 25 mg; 4.7%, 0.8% and 0.8% for pioglitazone 15 mg, 30 mg or 45 mg, respectively; and 0.8% for placebo. In a 26 week, active-controlled, double-blind study with alogliptin alone, pioglitazone alone or alogliptin coadministered with pioglitazone in patients inadequately controlled on diet and exercise, the incidence of hypoglycemia was 3% on alogliptin 25 mg with pioglitazone 30 mg, 0.6% on alogliptin 25 mg and 1.8% on pioglitazone 30 mg. In a 52 week, active-controlled, double-blind study of alogliptin as add-on therapy to the combination of pioglitazone 30 mg and metformin compared to the titration of pioglitazone 30 mg to 45 mg and metformin, the incidence of subjects reporting hypoglycemia was 4.5% in the alogliptin 25 mg with pioglitazone 30 mg and metformin group versus 1.5% in the pioglitazone 45 mg and metformin group. Alogliptin A total of 14,778 patients with type 2 diabetes mellitus participated in 14 randomized, double-blind, controlled clinical trials of whom 9,052 subjects were treated with alogliptin, 3,469 subjects were treated with placebo and 2,257 were treated with an active comparator. The racial distribution of patients exposed to trial medication was 71% White, 17% Asian, 6% Black or African American, 2% American Indian or Alaska Native, 0% Native Hawaiian/Other Pacific Islander and 5% Multiracial or other racial groups. The ethnic distribution was 30% Hispanic or Latino and 70% was not Hispanic or Latino. The mean duration of diabetes was seven years, the mean body mass index (BMI) was 31 kg/m 2 (49% of patients had a BMI ≥30 kg/m 2 ) and the mean age was 58 years (26% of patients ≥65 years of age). The mean exposure to alogliptin was 49 weeks with 3,348 subjects treated for more than one year. In a pooled analysis of these 14 controlled clinical trials, the overall incidence of adverse reactions was 73% in patients treated with alogliptin 25 mg compared to 75% with placebo and 70% with active comparator. Overall discontinuation of therapy due to adverse reactions was 6.8% with alogliptin 25 mg compared to 8.4% with placebo or 6.2% with active comparator. Adverse reactions reported in ≥4% of adult patients treated with alogliptin 25 mg and more frequently than in patients who received placebo are summarized in Table 3. Table 3. Adverse Reactions Reported in ≥4% Adult Patients with Type 2 Diabetes Mellitus Treated with Alogliptin 25 mg and More Frequently Than in Patients Given Placebo in Pooled Trials Number of Patients (%) Alogliptin 25 mg Placebo Active Comparator N=6447 N=3469 N=2257 Nasopharyngitis 309 (5) 152 (4) 113 (5) Upper Respiratory Tract Infection 287 (5) 121 (4) 113 (5) Headache 278 (4) 101 (3) 121 (5) Hypoglycemia Hypoglycemic events were documented based upon a blood glucose value and/or clinical signs and symptoms of hypoglycemia. In the monotherapy trial, the incidence of hypoglycemia was 1.5% in patients treated with alogliptin compared to 1.6% with placebo. The use of alogliptin as add-on therapy to glyburide or insulin did not increase the incidence of hypoglycemia compared to placebo. In a monotherapy trial comparing alogliptin to a sulfonylurea in elderly patients, the incidence of hypoglycemia was 5.4% with alogliptin compared to 26% with glipizide. In the EXAMINE trial, the incidence of investigator reported hypoglycemia was 6.7% in patients receiving alogliptin and 6.5% in patients receiving placebo. Serious adverse reactions of hypoglycemia were reported in 0.8% of patients treated with alogliptin and in 0.6% of patients treated with placebo. Renal Impairment In glycemic control trials in patients with type 2 diabetes mellitus, 3.4% of patients treated with alogliptin and 1.3% of patients treated with placebo had renal function adverse reactions. The most commonly reported adverse reactions were renal impairment (0.5% for alogliptin and 0.1% for active comparators or placebo), decreased creatinine clearance (1.6% for alogliptin and 0.5% for active comparators or placebo) and increased blood creatinine (0.5% for alogliptin and 0.3% for active comparators or placebo) [see Use in Specific Populations (8.6) ] . In the EXAMINE trial of high CV risk type 2 diabetes mellitus patients, 23% of patients treated with alogliptin and 21% of patients treated with placebo had an investigator reported renal impairment adverse reaction. The most commonly reported adverse reactions were renal impairment (7.7% for alogliptin and 6.7% for placebo), decreased glomerular filtration rate (4.9% for alogliptin and 4.3% for placebo) and decreased renal clearance (2.2% for alogliptin and 1.8% for placebo). Laboratory measures of renal function were also assessed. Estimated glomerular filtration rate decreased by 25% or more in 21.1% of patients treated with alogliptin and 18.7% of patients treated with placebo. Worsening of chronic kidney disease stage was seen in 16.8% of patients treated with alogliptin and in 15.5% of patients treated with placebo. Pioglitazone Over 8,500 patients with type 2 diabetes mellitus have been treated with pioglitazone in randomized, double-blind, controlled clinical trials, including 2,605 patients with type 2 diabetes mellitus and macrovascular disease treated with pioglitazone in the PROactive clinical trial. In these trials, over 6,000 patients have been treated with pioglitazone for six months or longer, over 4,500 patients have been treated with pioglitazone for one year or longer, and over 3,000 patients have been treated with pioglitazone for at least two years. Common Adverse Reactions: 16 to 26-Week Monotherapy Trials A summary of the incidence and type of common adverse reactions reported in three pooled 16 to 26 week placebo-controlled monotherapy trials of pioglitazone is provided in Table 4 . Terms that are reported represent those that occurred at an incidence of >5% and more commonly in patients treated with pioglitazone than in patients who received placebo. None of these adverse reactions were related to pioglitazone dose. Table 4. Three Pooled 16 to 26 Week Placebo-Controlled Clinical Trials of Pioglitazone Monotherapy: Adverse Reactions Reported at an Incidence >5% and More Commonly in Patients Treated with Pioglitazone than in Patients Treated with Placebo % of Patients Placebo Pioglitazone N=259 N=606 Upper Respiratory Tract Infection 8.5 13.2 Headache 6.9 9.1 Sinusitis 4.6 6.3 Myalgia 2.7 5.4 Pharyngitis 0.8 5.1 Congestive Heart Failure A summary of the incidence of adverse reactions related to congestive heart failure for the 16 to 24 week add-on to sulfonylurea trials, for the 16 to 24 week add-on to insulin trials, and for the 16 to 24 week add-on to metformin trials were (at least one congestive heart failure, 0.2% to 1.7%; hospitalized due to congestive heart failure, 0.2% to 0.9%). None of the reactions were fatal. Patients with type 2 diabetes mellitus and NYHA class II or early class III congestive heart failure were randomized to receive 24 weeks of double-blind treatment with either pioglitazone at daily doses of 30 mg to 45 mg (N=262) or glyburide at daily doses of 10 mg to 15 mg (N=256). A summary of the incidence of adverse reactions related to congestive heart failure reported in this study is provided in Table 5 . Table 5. Treatment-Emergent Adverse Reactions of Congestive Heart Failure (CHF) in Patients with NYHA Class II or III Congestive Heart Failure Treated with Pioglitazone or Glyburide Number (%) of Subjects Pioglitazone Glyburide N=262 N=256 Death due to cardiovascular causes (adjudicated) 5 (1.9%) 6 (2.3%) Overnight hospitalization for worsening CHF (adjudicated) 26 (9.9%) 12 (4.7%) Emergency room visit for CHF (adjudicated) 4 (1.5%) 3 (1.2%) Patients experiencing CHF progression during study 35 (13.4%) 21 (8.2%) Congestive heart failure events leading to hospitalization that occurred during the PROactive trial are summarized in Table 6 . Table 6. Treatment-Emergent Adverse Reactions of Congestive Heart Failure (CHF) in PROactive Trial Number (%) of Patients Placebo Pioglitazone N=2,633 N=2,605 At least one hospitalized congestive heart failure event 108 (4.1%) 149 (5.7%) Fatal 22 (0.8%) 25 (1%) Hospitalized, nonfatal 86 (3.3%) 124 (4.7%) Cardiovascular Safety In the PROactive trial, 5,238 patients with type 2 diabetes mellitus and a history of macrovascular disease were randomized to pioglitazone (N=2,605), force-titrated up to 45 mg daily or placebo (N=2,633) in addition to standard of care. Almost all patients (95%) were receiving cardiovascular medications (beta blockers, ACE inhibitors, angiotensin II receptor blockers, calcium channel blockers, nitrates, diuretics, aspirin, statins and fibrates). At baseline, patients had a mean age of 62 years, mean duration of diabetes mellitus of 9.5 years and mean A1C of 8.1%. Mean duration of follow-up was 34.5 months. The primary objective of this trial was to examine the effect of pioglitazone on mortality and macrovascular morbidity in patients with type 2 diabetes mellitus who were at high risk for macrovascular events. The primary efficacy variable was the time to the first occurrence of any event in a cardiovascular composite endpoint that included all-cause mortality, nonfatal myocardial infarction (MI) including silent MI, stroke, acute coronary syndrome, cardiac intervention including coronary artery bypass grafting or percutaneous intervention, major leg amputation above the ankle and bypass surgery or revascularization in the leg. A total of 514 (19.7%) patients treated with pioglitazone and 572 (21.7%) placebo-treated patients experienced at least one event from the primary composite endpoint (hazard ratio = 0.90; 95% Confidence Interval: 0.80, 1.02; p=0.10). Although there was no statistically significant difference between pioglitazone and placebo for the three-year incidence of a first event within this composite, there was no increase in mortality or in total macrovascular events with pioglitazone. The number of first occurrences and total individual events contributing to the primary composite endpoint is shown in Table 7 . Table 7. PROactive: Number of First and Total Events for Each Component Within the Cardiovascular Composite Endpoint CABG=coronary artery bypass grafting; PCI=percutaneous intervention Placebo N=2,633 Pioglitazone N=2,605 Cardiovascular Events First Events n (%) Total Events n First Events n (%) Total Events n Any Event 572 (21.7) 900 514 (19.7) 803 All-Cause Mortality 122 (4.6) 186 110 (4.2) 177 Nonfatal Myocardial Infarction (MI) 118 (4.5) 157 105 (4) 131 Stroke 96 (3.6) 119 76 (2.9) 92 Acute Coronary Syndrome 63 (2.4) 78 42 (1.6) 65 Cardiac Intervention (CABG/PCI) 101 (3.8) 240 101 (3.9) 195 Major Leg Amputation 15 (0.6) 28 9 (0.3) 28 Leg Revascularization 57 (2.2) 92 71 (2.7) 115 Weight Gain Dose-related weight gain occurs when pioglitazone is used alone or in combination with other antidiabetic medications. The mechanism of weight gain is unclear but probably involves a combination of fluid retention and fat accumulation. Edema Edema induced from taking pioglitazone is reversible when pioglitazone is discontinued. The edema usually does not require hospitalization unless there is coexisting congestive heart failure. Hepatic Effects There has been no evidence of pioglitazone-induced hepatotoxicity in the pioglitazone controlled clinical trial database to date. One randomized, double-blind, three-year trial comparing pioglitazone to glyburide as add-on to metformin and insulin therapy was specifically designed to evaluate the incidence of serum ALT elevation to greater than three times the upper limit of the reference range, measured every eight weeks for the first 48 weeks of the trial then every 12 weeks thereafter. A total of 3/1051 (0.3%) patients treated with pioglitazone and 9/1046 (0.9%) patients treated with glyburide developed ALT values greater than three times the upper limit of the reference range. None of the patients treated with pioglitazone in the pioglitazone controlled clinical trial database to date have had a serum ALT greater than three times the upper limit of the reference range and a corresponding total bilirubin greater than two times the upper limit of the reference range, a combination predictive of the potential for severe drug-induced liver injury. Hypoglycemia In the pioglitazone clinical trials, adverse reactions of hypoglycemia were reported based on clinical judgment of the investigators and did not require confirmation with finger stick glucose testing. In the 16-week add-on to sulfonylurea trial, the incidence of reported hypoglycemia was 3.7% with pioglitazone 30 mg and 0.5% with placebo. In the 16-week add-on to insulin trial, the incidence of reported hypoglycemia was 7.9% with pioglitazone 15 mg, 15.4% with pioglitazone 30 mg and 4.8% with placebo. The incidence of reported hypoglycemia was higher with pioglitazone 45 mg compared to pioglitazone 30 mg in both the 24-week add-on to sulfonylurea trial (15.7% versus 13.4%) and in the 24 week add-on to insulin trial (47.8% versus 43.5%). Three patients in these four trials were hospitalized due to hypoglycemia. All three patients were receiving pioglitazone 30 mg (0.9%) in the 24-week add-on to insulin trial. An additional 14 patients reported severe hypoglycemia (defined as causing considerable interference with patient’s usual activities) that did not require hospitalization. These patients were receiving pioglitazone 45 mg in combination with sulfonylurea (N=2) or pioglitazone 30 mg or 45 mg in combination with insulin (N=12). Urinary Bladder Tumors Tumors were observed in the urinary bladder of male rats in the two-year carcinogenicity study [see Nonclinical Toxicology (13.1) ]. During the three-year PROactive clinical trial, 14 patients out of 2,605 (0.54%) randomized to pioglitazone and 5 out of 2,633 (0.19%) randomized to placebo were diagnosed with bladder cancer. After excluding patients in whom exposure to study drug was less than one year at the time of diagnosis of bladder cancer, there were 6 (0.23%) cases on pioglitazone and 2 (0.08%) cases on placebo. After completion of the trial, a large subset of patients was observed for up to 10 additional years, with little additional exposure to pioglitazone. During the 13 years of both PROactive and observational follow-up, the occurrence of bladder cancer did not differ between patients randomized to pioglitazone or placebo (HR =1.00; 95% CI: 0.59-1.72) [see Warnings and Precautions (5.7) ] . Laboratory Abnormalities Pioglitazone Hematologic Effects Pioglitazone may cause decreases in hemoglobin and hematocrit. In placebo-controlled monotherapy trials, mean hemoglobin values declined by 2% to 4% in patients treated with pioglitazone compared with a mean change in hemoglobin of -1% to +1% in placebo-treated patients. These changes primarily occurred within the first four to 12 weeks of therapy and remained relatively constant thereafter. These changes may be related to increased plasma volume associated with pioglitazone therapy and are not likely to be associated with any clinically significant hematologic effects. Creatine Phosphokinase During protocol-specified measurement of serum creatine phosphokinase (CPK) in pioglitazone clinical trials, an isolated elevation in CPK to greater than 10 times the upper limit of the reference range was noted in nine (0.2%) patients treated with pioglitazone (values of 2,150 to 11,400 IU/L) and in no comparator-treated patients. Six of these nine patients continued to receive pioglitazone, two patients were noted to have the CPK elevation on the last day of dosing and one patient discontinued pioglitazone due to the elevation. These elevations resolved without any apparent clinical sequelae. The relationship of these events to pioglitazone therapy is unknown. 6.2 Postmarketing Experience The following adverse reactions have been identified during the postmarketing use of alogliptin or pioglitazone. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Alogliptin Gastrointestinal Disorders: acute pancreatitis, diarrhea, constipation, nausea, ileus Hepatobiliary Disorders: fulminant hepatic failure Immune System Disorders: hypersensitivity reactions including anaphylaxis Investigations: hepatic enzyme elevations Musculoskeletal and Connective Tissue Disorders: severe and disabling arthralgia, rhabdomyolysis Renal and Urinary Disorders: tubulointerstitial nephritis Skin and Subcutaneous Tissue Disorders: angioedema, rash, urticaria and severe cutaneous adverse reactions including Stevens-Johnson syndrome, bullous pemphigoid Pioglitazone Cardiac Disorders: rapid increases in weight, edema, congestive heart failure both with and without previously known heart disease or concomitant insulin administration Eye Disorders: New onset or worsening diabetic macular edema with decreased visual acuity Hepatobiliary Disorders: Fatal and nonfatal hepatic failure

12.3 Pharmacokinetics Absorption Alogliptin and Pioglitazone In bioequivalence studies of alogliptin and pioglitazone tablets, the area under the plasma concentration curve (AUC) and maximum concentration (C max ) of both the alogliptin and the pioglitazone component following a single dose of the combination tablet (12.5 mg/15 mg or 25 mg/45 mg) were bioequivalent to alogliptin (12.5 mg or 25 mg) concomitantly administered with pioglitazone (15 mg or 45 mg respectively) tablets under fasted conditions in healthy subjects. Administration of alogliptin and pioglitazone tablets 25 mg/45 mg with food resulted in no significant change in overall exposure of alogliptin or pioglitazone. Alogliptin and pioglitazone tablets may therefore be administered with or without food. Alogliptin The absolute bioavailability of alogliptin is approximately 100%. Administration of alogliptin with a high-fat meal results in no significant change in total and peak exposure to alogliptin. Alogliptin may therefore be administered with or without food. Pioglitazone Following oral administration of pioglitazone hydrochloride, peak concentrations of pioglitazone were observed within two hours. Food slightly delays the time to peak serum concentration (T max ) to three to four hours but does not alter the extent of absorption (AUC). Distribution Alogliptin Following a single, 12.5 mg intravenous infusion of alogliptin to healthy subjects, the volume of distribution during the terminal phase was 417 L, indicating that the drug is well distributed into tissues. Alogliptin is 20% bound to plasma proteins. Pioglitazone The mean apparent V d /F of pioglitazone following single-dose administration is 0.63 ± 0.41 (mean ± SD) L/kg of body weight. Pioglitazone is extensively protein bound (>99%) in human serum, principally to serum albumin. Pioglitazone also binds to other serum proteins, but with lower affinity. Metabolites M-III and M-IV also are extensively bound (>98%) to serum albumin. Elimination Metabolism Alogliptin Alogliptin does not undergo extensive metabolism and 60% to 71% of the dose is excreted as unchanged drug in the urine. Two minor metabolites were detected following administration of an oral dose of [ 14 C] alogliptin, N -demethylated, M-I (less than 1% of the parent compound), and N -acetylated alogliptin, M-II (less than 6% of the parent compound). M-I is an active metabolite and is an inhibitor of DPP-4 similar to the parent molecule; M-II does not display any inhibitory activity toward DPP-4 or other DPP-related enzymes. In vitro data indicate that CYP2D6 and CYP3A4 contribute to the limited metabolism of alogliptin. Alogliptin exists predominantly as the ( R )-enantiomer (more than 99%) and undergoes little or no chiral conversion in vivo to the ( S )-enantiomer. The ( S )-enantiomer is not detectable at the 25 mg dose. Pioglitazone Pioglitazone is extensively metabolized by hydroxylation and oxidation; the metabolites also partly convert to glucuronide or sulfate conjugates. Metabolites M-III and M-IV are the major circulating active metabolites in humans. Following once-daily administration of pioglitazone, steady-state serum concentrations of both pioglitazone and its major active metabolites, M-III (keto derivative of pioglitazone) and M-IV (hydroxyl derivative of pioglitazone), are achieved within seven days. At steady-state, M-III and M-IV reach serum concentrations equal to or greater than that of pioglitazone. At steady-state, in both healthy volunteers and patients with type 2 diabetes mellitus, pioglitazone comprises approximately 30% to 50% of the peak total pioglitazone serum concentrations (pioglitazone plus active metabolites) and 20% to 25% of the total AUC. Maximum serum concentration (C max ), AUC and trough serum concentrations (C min ) for pioglitazone and M-III and M-IV, increased proportionally with administered doses of 15 mg and 30 mg per day. In vitro data demonstrate that multiple CYP isoforms are involved in the metabolism of pioglitazone. The cytochrome P450 isoforms involved are CYP2C8 and, to a lesser degree, CYP3A4 with additional contributions from a variety of other isoforms, including the mainly extrahepatic CYP1A1. In vivo studies of pioglitazone in combination with gemfibrozil, a strong CYP2C8 inhibitor, showed that pioglitazone is a CYP2C8 substrate [see Dosage and Administration (2.5) and Drug Interactions (7) ] . Urinary 6β-hydroxycortisol/cortisol ratios measured in patients treated with pioglitazone showed that pioglitazone is not a strong CYP3A4 enzyme inducer. Excretion Alogliptin The primary route of elimination of [ 14 C] alogliptin derived radioactivity occurs via renal excretion (76%) with 13% recovered in the feces, achieving a total recovery of 89% of the administered radioactive dose. The renal clearance of alogliptin (9.6 L/hr) indicates some active renal tubular secretion and systemic clearance was 14.0 L/hr. Pioglitazone Following oral administration, approximately 15% to 30% of the pioglitazone dose is recovered in the urine. Renal elimination of pioglitazone is negligible, and the drug is excreted primarily as metabolites and their conjugates. It is presumed that most of the oral dose is excreted into the bile either unchanged or as metabolites and eliminated in the feces. The mean serum half-life of pioglitazone and its metabolites (M-III and M-IV) range from three to seven hours and 16 to 24 hours, respectively. Pioglitazone has an apparent clearance, CL/F, calculated to be 5 to 7 L/hr. Specific Populations Geriatric Patients Alogliptin No dosage adjustment of alogliptin is necessary based on age. Age did not have any clinically meaningful effect on the pharmacokinetics of alogliptin. Pioglitazone In healthy elderly subjects, peak serum concentrations of pioglitazone and total pioglitazone are not significantly different, but AUC values are approximately 21% higher than those achieved in younger subjects. The mean terminal half-life values of pioglitazone were also longer in elderly subjects (about 10 hours) as compared to younger subjects (about seven hours). These changes are not considered clinically relevant. Pediatric Patients Alogliptin Studies characterizing the pharmacokinetics of alogliptin in pediatric patients have not been performed. Pioglitazone Safety and efficacy of pioglitazone in pediatric patients have not been established. Pioglitazone is not recommended for use in pediatric patients [see Use in Specific Populations (8.4) ] . Male and Female Patients Alogliptin No dosage adjustment of alogliptin is necessary based on gender. Gender did not have any clinically meaningful effect on the pharmacokinetics of alogliptin. Pioglitazone The mean C max and AUC values of pioglitazone were increased 20% to 60% in females compared to males. In controlled clinical trials, A1C decreases from baseline were generally greater for females than for males (mean difference in A1C 0.5%). Because therapy should be individualized for each patient to achieve glycemic control, no dosage adjustment is recommended based on gender alone. Race and Ethnic Groups Alogliptin No dosage adjustment of alogliptin is necessary based on race. Race (White, Black or African American, and Asian) did not have any clinically meaningful effect on the pharmacokinetics of alogliptin. Pioglitazone Pharmacokinetic data among various ethnic groups are not available. Patients with Renal Impairment Alogliptin A single-dose, open-label study was conducted to evaluate the pharmacokinetics of alogliptin 50 mg in patients with chronic renal impairment compared with healthy subjects. In patients with mild renal impairment (creatinine clearance [CrCl] ≥60 to <90 mL/min), an approximate 1.2-fold increase in plasma AUC of alogliptin was observed. Because increases of this magnitude are not considered clinically relevant, dosage adjustment for patients with mild renal impairment is not recommended. In patients with moderate renal impairment (CrCl ≥30 to <60 mL/min), an approximate two-fold increase in plasma AUC of alogliptin was observed. To maintain similar systemic exposures of alogliptin and pioglitazone tablets to those with normal renal function, the recommended dosage of alogliptin and pioglitazone tablets is 12.5 mg/30 mg once daily in patients with moderate renal impairment. In patients with severe renal impairment (CrCl ≥15 to <30 mL/min) and end-stage renal disease (ESRD) (CrCl <15 mL/min or requiring dialysis), an approximate three- and four-fold increase in plasma AUC of alogliptin were observed, respectively. Dialysis removed approximately 7% of the drug during a three-hour dialysis session. Alogliptin and pioglitazone tablets are not recommended for patients with severe renal impairment or ESRD because these patients require a lower dosage of alogliptin than what is available in the fixed dose combination product, alogliptin and pioglitazone tablets. Pioglitazone The serum elimination half-life of pioglitazone, M-III and M-IV remains unchanged in patients with moderate (creatinine clearance 30 to 50 mL/min) to severe (creatinine clearance <30 mL/min) renal impairment when compared to subjects with normal renal function. Therefore no dosage adjustment in patients with renal impairment is required. Patients with Hepatic Impairment Alogliptin Total exposure to alogliptin was approximately 10% lower and peak exposure was approximately 8% lower in patients with moderate hepatic impairment (Child-Pugh Grade B) compared to healthy subjects. The magnitude of these reductions is not considered to be clinically meaningful. Patients with severe hepatic impairment (Child-Pugh Grade C) have not been studied. Use caution when administering alogliptin and pioglitazone tablets to patients with liver disease [see Use in Specific Populations (8.7) and Warnings and Precautions (5.4) ] . Pioglitazone Compared with healthy controls, subjects with impaired hepatic function (Child-Pugh Grade B and C) have an approximate 45% reduction in pioglitazone and total pioglitazone (pioglitazone, M-III and M-IV) mean peak concentrations but no change in the mean AUC values. Therefore, no dosage adjustment in patients with hepatic impairment is required. There are postmarketing reports of liver failure with pioglitazone and clinical trials have generally excluded patients with serum ALT >2.5 times the upper limit of the reference range. Use caution in patients with liver disease [see Warnings and Precautions (5.4) ]. Drug Interaction Studies Coadministration of alogliptin 25 mg once daily with a CYP2C8 substrate, pioglitazone 45 mg once daily for 12 days had no clinically meaningful effects on the pharmacokinetics of pioglitazone and its active metabolites. Specific pharmacokinetic drug interaction studies with alogliptin and pioglitazone tablets have not been performed, although such studies have been conducted with the individual components of alogliptin and pioglitazone tablets (alogliptin and pioglitazone). Alogliptin In Vitro Assessment of Drug Interactions In vitro studies indicate that alogliptin is neither an inducer of CYP1A2, CYP2B6, CYP2C9, CYP2C19 and CYP3A4, nor an inhibitor of CYP1A2, CYP2C8, CYP2C9, CYP2C19, CYP3A4 and CYP2D6 at clinically relevant concentrations. In Vivo Assessment of Drug Interactions Effects of Alogliptin on the Pharmacokinetics of Other Drugs In clinical studies, alogliptin did not meaningfully increase the systemic exposure to the following drugs that are metabolized by CYP isozymes or excreted unchanged in urine (Figure 1) . No dosage adjustment of alogliptin is recommended based on results of the described pharmacokinetic studies. Figure 1. Effect of Alogliptin on the Pharmacokinetic Exposure to Other Drugs * Warfarin was given once daily at a stable dose in the range of 1 mg to 10 mg. Alogliptin had no significant effect on the prothrombin time (PT) or International Normalized Ratio (INR). **Caffeine (1A2 substrate), tolbutamide (2C9 substrate), dextromethorphan (2D6 substrate), midazolam (3A4 substrate) and fexofenadine (P-gp substrate) were administered as a cocktail. Figure 1 Effects of Other Drugs on the Pharmacokinetics of Alogliptin There are no clinically meaningful changes in the pharmacokinetics of alogliptin when alogliptin is administered concomitantly with the drugs described below (Figure 2). Figure 2. Effect of Other Drugs on the Pharmacokinetic Exposure of Alogliptin Figure 2 Pioglitazone Table 9. Effect of Pioglitazone Coadministration on Systemic Exposure of Other Drugs Coadministered Drug Pioglitazone Dosage Regimen (mg) Daily for seven days unless otherwise noted Name and Dose Regimens Change in AUC % change (with/without coadministered drug and no change=0%); symbols of ↑ and ↓ indicate the exposure increase and decrease, respectively Change in C max 45 mg (N=12) Warfarin Pioglitazone had no clinically significant effect on prothrombin time Daily loading then maintenance doses based PT and INR values Quick's Value=35 ± 5% R-Warfarin ↓3% R-Warfarin ↓2% S-Warfarin ↓1% S-Warfarin ↑1% 45 mg (N=12) Digoxin 0.200 mg twice daily (loading dose) then 0.250 mg daily (maintenance dose, 7 days) ↑15% ↑17% 45 mg daily for 21 days (N=35) Oral Contraceptive [Ethinyl Estradiol (EE) 0.035 mg plus Norethindrone (NE) 1 mg] for 21 days EE ↓11% EE ↓13% NE ↑3% NE ↓7% 45 mg (N=23) Fexofenadine 60 mg twice daily for 7 days ↑30% ↑37% 45 mg (N=14) Glipizide 5 mg daily for 7 days ↓3% ↓8% 45 mg daily for 8 days (N=16) Metformin 1000 mg single dose on 8 days ↓3% ↓5% 45 mg (N=21) Midazolam 7.5 mg single dose on day 15 ↓26% ↓26% 45 mg (N=24) Ranitidine 150 mg twice daily for 7 days ↑1% ↓1% 45 mg daily for 4 days (N=24) Nifedipine ER 30 mg daily for 4 days ↓13% ↓17% 45 mg (N=25) Atorvastatin Calcium 80 mg daily for 7 days ↓14% ↓23% 45 mg (N=22) Theophylline 400 mg twice daily for 7 days ↑2% ↑5% Table 10. Effect of Coadministered Drugs on Pioglitazone Systemic Exposure Coadministered Drug and Dosage Regimen Pioglitazone Dose Regimen (mg) Daily for seven days unless otherwise noted Change in AUC Mean ratio (with/without coadministered drug and no change=one-fold) % change (with/without coadministered drug and no change=0%); symbols of ↑ and ↓ indicate the exposure increase and decrease, respectively Change in C max Gemfibrozil 600 mg twice daily for 2 days (N=12) 30 mg single dose ↑3.4-fold The half-life of pioglitazone increased from 6.5 hours to 15.1 hours in the presence of gemfibrozil [see Dosage and Administration (2.5) and Drug Interactions (7) ] ↑6% Ketoconazole 200 mg twice daily for 7 days (N=28) 45 mg ↑34% ↑14% Rifampin 600 mg daily for 5 days (N=10) 30 mg single dose ↓54% ↓5% Fexofenadine 60 mg twice daily for 7 days (N=23) 45 mg ↑1% 0% Ranitidine 150 mg twice daily for 4 days (N=23) 45 mg ↓13% ↓16% Nifedipine ER 30 mg daily for 7 days (N=23) 45 mg ↑5% ↑4% Atorvastatin Calcium 80 mg daily for 7 days (N=24) 45 mg ↓24% ↓31% Theophylline 400 mg twice daily for 7 days (N=22) 45 mg ↓4% ↓2% Topiramate 96 mg twice daily for 7 days Indicates duration of concomitant administration with highest twice-daily dose of topiramate from Day 14 onwards over the 22 days of study (N=26) 30 mg ↓15% Additional decrease in active metabolites; 60% for M-III and 16% for M-IV 0%