pioglitazone and glimepiride

1 INDICATIONS AND USAGE Pioglitazone and glimepiride tablets are indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus who are already treated with a thiazolidinedione and sulfonylurea or who have inadequate glycemic control on a thiazolidinedione alone or a sulfonylurea alone [see Clinical Studies (14) ] . Pioglitazone and glimepiride tablets are a thiazolidinedione and a sulfonylurea combination product indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus when treatment with both pioglitazone and glimepiride is appropriate. ( 1 ) Important Limitations of Use: Not for treatment of type 1 diabetes or diabetic ketoacidosis. ( 1 ) Important Limitations of Use Pioglitazone exerts its antihyperglycemic effect only in the presence of endogenous insulin. Pioglitazone and glimepiride tablets should not be used to treat type 1 diabetes or diabetic ketoacidosis, as it would not be effective in these settings. Use caution in patients with liver disease [see Warnings and Precautions (5.5) ].

2 DOSAGE AND ADMINISTRATION Individualize the starting dose of pioglitazone and glimepiride tablets based on the patient's current regimen. ( 2.1 ) May adjust the dosing based on effectiveness and tolerability while not exceeding the maximum recommended daily dose of pioglitazone 45 mg and glimepiride 8 mg. ( 2.1 ) Pioglitazone and glimepiride tablets should be given in a single dose once daily with meals. ( 2.1 ) Obtain liver tests before starting pioglitazone and glimepiride tablets. If abnormal, use caution when treating with pioglitazone and glimepiride tablets, investigate the probable cause, treat (if possible) and follow appropriately. Monitoring liver tests while on pioglitazone and glimepiride tablets is not recommended in patients without liver disease. ( 5.5 ) 2.1 Recommendations for All Patients Pioglitazone and glimepiride tablets should be taken once daily with the first main meal. Pioglitazone and glimepiride tablets are available as a 30 mg pioglitazone plus 2 mg glimepiride or a 30 mg pioglitazone plus 4 mg glimepiride tablet. If therapy with a combination tablet containing pioglitazone and glimepiride is considered appropriate the recommended starting dose is: 30 mg/2 mg or 30 mg/4 mg once daily and gradually titrated, as needed, after assessing adequacy of therapeutic response and tolerability, for patients inadequately controlled on glimepiride monotherapy: 30 mg/2 mg or 30 mg/4 mg once daily and gradually titrated, as needed, after assessing adequacy of therapeutic response and tolerability, for patients inadequately controlled on pioglitazone monotherapy: 30 mg/2 mg once daily and gradually titrated, as needed, after assessing adequacy of therapeutic response and tolerability, for patients who are changing from combination therapy of pioglitazone plus glimepiride as separate tablets: pioglitazone and glimepiride tablets should be taken at doses that are as close as possible to the dose of pioglitazone and glimepiride already being taken, for patients currently on a different sulfonylurea monotherapy or switching from combination therapy of pioglitazone plus a different sulfonylurea (e.g., glyburide, glipizide, chlorpropamide, tolbutamide, acetohexamide): 30 mg/2 mg once daily and adjusted after assessing adequacy of therapeutic response. Observe for hypoglycemia for one to two weeks due to the potential overlapping drug effect. for patients with systolic dysfunction, the lowest approved dose of pioglitazone and glimepiride tablets should be prescribed only after titration from 15 mg to 30 mg of pioglitazone has been safely tolerated. After initiation of pioglitazone and glimepiride tablets or with dose increase, monitor patients carefully for hypoglycemia and adverse reactions related to fluid retention such as weight gain, edema, and signs and symptoms of congestive heart failure [see Boxed Warning and Warnings and Precautions (5.7) ] . Liver tests (serum alanine and aspartate aminotransferases, alkaline phosphatase, and total bilirubin) should be obtained prior to initiating pioglitazone and glimepiride tablets. Routine periodic monitoring of liver tests during treatment with pioglitazone and glimepiride tablets is not recommended in patients without liver disease. Patients who have liver test abnormalities prior to initiation of pioglitazone and glimepiride tablets or who are found to have abnormal liver tests while taking pioglitazone and glimepiride tablets should be managed as described under Warnings and Precautions [see Warnings and Precautions (5.5) and Clinical Pharmacology (12.3) ] . 2.2 Concomitant Use with an Insulin Secretagogue or Insulin If hypoglycemia occurs in a patient coadministered pioglitazone and glimepiride tablets and an insulin secretagogue, the dose of the insulin secretagogue should be reduced . If hypoglycemia occurs in a patient coadministered pioglitazone and glimepiride tablets and insulin, the dose of insulin should be decreased by 10% to 25%. Further adjustments to the i…

5 WARNINGS AND PRECAUTIONS Congestive heart failure: Fluid retention may occur and can exacerbate or lead to congestive heart failure. Combination use with insulin and use in congestive heart failure NYHA Class I and II may increase risk. Monitor patients for signs and symptoms. ( 5.1 ) Hypoglycemia: May be severe. When insulin or an insulin secretagogue is used with pioglitazone, a lower dose of the insulin or insulin secretagogue may be needed to reduce the risk of hypoglycemia. ( 5.2 ) Hypersensitivity Reactions: Postmarketing reports for glimepiride, a component of pioglitazone and glimepiride tablets, include anaphylaxis, angioedema and Stevens-Johnson Syndrome. Promptly discontinue pioglitazone and glimepiride tablets, assess for other cases, institute appropriate monitoring and treatment, and initiate alternative treatment for diabetes. ( 5.3 ) Potential increased risk of cardiovascular mortality with sulfonylureas: Inform patients of risk, benefits, and treatment alternatives. ( 5.4 ) Hepatic effects: Postmarketing reports of hepatic failure, sometimes fatal. Causality cannot be excluded. If liver injury is detected, promptly interrupt pioglitazone and glimepiride tablets and assess patient for probable cause, then treat cause if possible, to resolution or stabilization. Do not restart pioglitazone and glimepiride tablets if liver injury is confirmed and no alternate etiology can be found. ( 5.5 ) Bladder cancer: May increase the risk of bladder cancer. Do not use in patients with active bladder cancer. Use caution when using in patients with a prior history of bladder cancer. ( 5.6 ) Edema: Dose-related edema may occur. ( 5.7 ) Fractures: Increased incidence in female patients. Apply current standards of care for assessing and maintaining bone health. ( 5.8 ) Hemolytic anemia: Can occur if glucose 6-phosphate dehydrogenase (GP6D) deficient. Use with caution in patients with GP6D deficiency. ( 5.9 ) Macular edema: Postmarketing reports. Recommend regular eye exams in all patients with diabetes according to current standards of care with prompt evaluation for acute visual changes. ( 5.10 ) Macrovascular outcomes: There have been no clinical studies establishing conclusive evidence of macrovascular risk reduction with pioglitazone and glimepiride tablets. ( 5.11 ) 5.1 Congestive Heart Failure Pioglitazone Pioglitazone, like other thiazolidinediones, can cause dose-related fluid retention when used alone or in combination with other antidiabetic medications and is most common when pioglitazone and glimepiride tablets are used in combination with insulin. Fluid retention may lead to or exacerbate congestive heart failure. Patients should be observed for signs and symptoms of congestive heart failure. If congestive heart failure develops, it should be managed according to current standards of care and discontinuation or dose reduction of pioglitazone and glimepiride tablets must be considered [see Boxed Warning , Contraindications (4) and Adverse Reactions (6.1) ] . 5.2 Hypoglycemia Glimepiride All sulfonylureas, including glimepiride, a component of pioglitazone and glimepiride tablets, can cause severe hypoglycemia [see Adverse Reactions (6.1) ] . The patient's ability to concentrate and react may be impaired as a result of hypoglycemia. These impairments may present a risk in situations where these abilities are especially important, such as driving or operating other machinery. Severe hypoglycemia can lead to unconsciousness or convulsions and may result in temporary or permanent impairment of brain function or death. Patients must be educated to recognize and manage hypoglycemia. Use caution when initiating and increasing pioglitazone and glimepiride tablet doses in patients who may be predisposed to hypoglycemia (e.g., the elderly, patients with renal impairment, patients on other antidiabetic medications). Debilitated or malnourished patients and those with adrenal, pituitary, or hepatic impairment are particularly s…

4 CONTRAINDICATIONS Initiation in patients with established NYHA Class III or IV heart failure [see Boxed Warning ] . Use in patients with known hypersensitivity to pioglitazone, glimepiride or any other component of pioglitazone and glimepiride tablets [see Warnings and Precautions (5.3) ] . Use in patients with known history of an allergic reaction to sulfonamide derivatives. Reported hypersensitivity reactions with glimepiride include cutaneous eruptions with or without pruritus as well as more serious reactions (e.g., anaphylaxis, angioedema, Stevens-Johnson Syndrome, dyspnea) [see Warnings and Precautions (5.3) and Adverse Reactions (6.2) ] Initiation in patients with established New York Heart Association (NYHA) Class III or IV heart failure [see Boxed Warning ] . ( 4 ) Use in patients with known hypersensitivity to pioglitazone, glimepiride or any other component of pioglitazone and glimepiride tablets. ( 4 ) Hypersensitivity to sulfonamide derivatives. ( 4 )

7 DRUG INTERACTIONS Strong CYP2C8 inhibitors (e.g., gemfibrozil) increase pioglitazone concentrations. Limit pioglitazone dose to 15 mg daily. ( 2.3 , 7.1 ) CYP2C8 inducers (e.g., rifampin) may decrease pioglitazone concentrations. ( 7.2 ) Topiramate may decrease pioglitazone concentrations. ( 7.3 ) Certain medications may affect glucose metabolism, requiring pioglitazone and glimepiride tablet dose adjustment and close monitoring of blood glucose. ( 7.4 ) Miconazole: Severe hypoglycemia can occur when pioglitazone and glimepiride tablets and oral miconazole are used concomitantly. ( 7.5 ) CYP2C9 interactions: Inhibitors and inducers may affect glycemic control by altering glimepiride plasma concentrations. ( 7.6 ) Colesevelam: Coadministration may reduce glimepiride absorption. Pioglitazone and glimepiride tablets should be administered at least 4 hours prior to colesevelam. ( 2.4 , 7.7 ) 7.1 Strong CYP2C8 Inhibitors Pioglitazone An inhibitor of CYP2C8 (e.g., gemfibrozil) significantly increases the exposure (area under the serum concentration-time curve or AUC) and half-life (t ½ ) of pioglitazone. Therefore, the maximum recommended dose of pioglitazone is 15 mg daily if used in combination with gemfibrozil or other strong CYP2C8 inhibitors. Since the minimum dose of pioglitazone in pioglitazone and glimepiride tablets exceeds 15 mg, patients taking concomitant strong CYP2C8 inhibitors should switch to individual components of pioglitazone and glimepiride tablets, unless the prescribing health care provider determines that the benefit of pioglitazone and glimepiride tablets clearly outweighs the risk of increased pioglitazone exposure [see Dosage and Administration (2.3) and Clinical Pharmacology (12.3) ] . 7.2 CYP2C8 Inducers Pioglitazone An inducer of CYP2C8 (e.g., rifampin) may significantly decrease the exposure (AUC) of pioglitazone. Therefore, if an inducer of CYP2C8 is started or stopped during treatment with pioglitazone, changes in diabetes treatment may be needed based on clinical response without exceeding the maximum recommended daily dose of 45 mg for pioglitazone [see Clinical Pharmacology (12.3) ] . 7.3 Topiramate Pioglitazone A decrease in the exposure of pioglitazone and its active metabolites were noted with concomitant administration of pioglitazone and topiramate [see Clinical Pharmacology (12.3) ] . The clinical relevance of this decrease is unknown; however, when pioglitazone and topiramate are used concomitantly, monitor patients for adequate glycemic control. 7.4 Drugs Affecting Glucose Metabolism Glimepiride A number of medications affect glucose metabolism and may require pioglitazone and glimepiride tablet dose adjustment and particularly close monitoring for hypoglycemia or worsening glycemic control. The following are examples of medications that may increase the glucose-lowering effect of sulfonylureas including glimepiride, a component of pioglitazone and glimepiride tablets, increasing the susceptibility to and/or intensity of hypoglycemia: oral anti-diabetic medications, pramlintide acetate, insulin, angiotensin converting enzyme (ACE) inhibitors, H2 receptor antagonists, fibrates, propoxyphene, pentoxifylline, somatostatin analogs, anabolic steroids and androgens, cyclophosphamide, phenyramidol, guanethidine, fluconazole, sulfinpyrazone, tetracyclines, clarithromycin, disopyramide, quinolones, and those drugs that are highly protein-bound, such as fluoxetine, nonsteroidal anti-inflammatory drugs, salicylates, sulfonamides, chloramphenicol, coumarins, probenecid and monoamine oxidase inhibitors. When these medications are administered to a patient receiving pioglitazone and glimepiride tablets, monitor the patient closely for hypoglycemia. When these medications are withdrawn from a patient receiving pioglitazone and glimepiride tablets, monitor the patient closely for worsening glycemic control. The following are examples of medications that may reduce the glucose-lowering effect of sulfonyl…

8.1 Pregnancy Risk Summary Limited data with pioglitazone and glimepiride tablets or pioglitazone in pregnant women are not sufficient to determine a drug-associated risk for major birth defects or miscarriage. There are clinical considerations related to fetal and neonatal adverse reactions and drug discontinuation if glimepiride is used during pregnancy. There are risks to the mother and fetus associated with poorly controlled diabetes in pregnancy [see Clinical Considerations ]. No adverse developmental effects were observed when pioglitazone was administered to pregnant rats and rabbits during organogenesis at exposures up to 5 and 35 times the 45 mg clinical dose, respectively, based on the body surface area. Administration of glimepiride to pregnant rats and rabbits during organogenesis induced maternal hypoglycemia and also increased fetal mortality at doses 50 (rats) and 0.1 times (rabbits) the 8 mg clinical dose, respectively, based on body surface area [see Data ] . The estimated background risk of major birth defects is 6-10% in women with pre-gestational diabetes with a HbA1c >7 and has been reported to be as high as 20-25% in women with a HbA1c >10. The estimated background risk of miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20% respectively. Clinical Considerations Disease-associated maternal and/or embryo/fetal risk Poorly controlled diabetes in pregnancy increases the maternal risk for diabetic ketoacidosis, pre-eclampsia, spontaneous abortions, preterm delivery, still birth and delivery complications. Poorly controlled diabetes increases the fetal risk for major birth defects, still birth, and macrosomia related morbidity. Fetal/Neonatal Adverse Reaction Neonates of women with gestational diabetes, who are treated with sulfonylureas during pregnancy, may be at increased risk for neonatal intensive care unit admission, and may develop respiratory distress, hypoglycemia, birth injury, and be large for gestational age. Prolonged severe hypoglycemia, lasting 4-10 days, has been reported in neonates born to mothers receiving a sulfonylurea at the time of delivery and has been reported with the use of agents with a prolonged half-life. Observe newborns for symptoms of hypoglycemia and respiratory distress and manage accordingly. Dose adjustments during pregnancy and the postpartum period Due to reports of prolonged severe hypoglycemia in neonates born to mothers receiving a sulfonylurea at the time of delivery, pioglitazone and glimepiride should be discontinued at least two weeks before expected delivery [see Fetal/Neonatal Adverse Reaction ]. Data Animal Data Pioglitazone and Glimepiride Animal reproduction studies were not conducted with the combined products in pioglitazone and glimepiride tablets. The following data are based on studies conducted with the individual components of pioglitazone and glimepiride tablets. Pioglitazone Pioglitazone administered to pregnant rats during organogenesis did not cause adverse developmental effects at a dose of 20 mg/kg (~5 times the 45 mg clinical dose), but delayed parturition and reduced embryofetal viability at 40 and 80 mg/kg, or ≥9 times the 45 mg clinical dose, by body surface area. In pregnant rabbits administered pioglitazone during organogenesis, no adverse developmental effects were observed at 80 mg/kg (~35 times the 45 mg clinical dose), but reduced embryofetal viability at 160 mg/kg, or ~69 times the 45 mg clinical dose, by body surface area. When pregnant rats received pioglitazone during late gestation and lactation, delayed postnatal development, attributed to decreased body weight occurred in offspring at maternal doses of 10 mg/kg and above or ≥2 times the 45 mg clinical dose, by body surface area. Glimepiride Fetal deaths occurred in rats and rabbits administered glimepiride during the period of…

6 ADVERSE REACTIONS The following serious adverse reactions are discussed elsewhere in the labeling: Congestive Heart Failure [see Boxed Warning and Warnings and Precautions (5.1) ] Hypoglycemia [see Warnings and Precautions (5.2) ] Edema [see Warnings and Precautions (5.7) ] Fractures [see Warnings and Precautions (5.8) ] Hemolytic Anemia [see Warnings and Precautions (5.9) ] Most common adverse reactions (≥5%) are upper respiratory tract infection, accidental injury, and combined edema/peripheral edema. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Takeda Pharmaceuticals at 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. The adverse events reported in at least 5% of patients in the controlled 16 week clinical studies between placebo plus a sulfonylurea and pioglitazone (15 mg and 30 mg combined) plus sulfonylurea treatment arms were upper respiratory tract infection (15.5% and 16.6%), accidental injury (8.6% and 3.5%), and combined edema/peripheral edema (2.1% and 7.2%), respectively. The incidence and type of adverse events reported in at least 5% of patients in any combined treatment group from the 24 week study comparing pioglitazone 30 mg plus a sulfonylurea and pioglitazone 45 mg plus a sulfonylurea are shown in Table 1; the rate of adverse events resulting in study discontinuation between the two treatment groups was 6% and 9.7%, respectively. Table 1. Adverse Events that Occurred in ≥5% of Patients in Any Treatment Group During the 24 Week Study Adverse Event Pioglitazone 30 mg + Sulfonylurea N=351 n (%) Pioglitazone 45 mg + Sulfonylurea N=351 n (%) Hypoglycemia 47 (13.4) 55 (15.7) Upper Respiratory Tract Infection 43 (12.3) 52 (14.8) Weight Increased 32 (9.1) 47 (13.4) Edema Lower Limb 20 (5.7) 43 (12.3) Headache 25 (7.1) 14 (4.0) Urinary Tract Infection 20 (5.7) 24 (6.8) Diarrhea 21 (6.0) 15 (4.3) Nausea 18 (5.1) 14 (4.0) Pain in Limb 19 (5.4) 14 (4.0) In US double-blind studies, anemia was reported in ≤2% of patients treated with pioglitazone plus a sulfonylurea [see Warnings and Precautions (5.9) ] . Pioglitazone Over 8500 patients with type 2 diabetes have been treated with pioglitazone in randomized, double-blind, controlled clinical trials, including 2605 patients with type 2 diabetes and macrovascular disease treated with pioglitazone in the PROactive clinical trial. In these trials, over 6000 patients have been treated with pioglitazone for six months or longer, over 4500 patients have been treated with pioglitazone for one year or longer, and over 3000 patients have been treated with pioglitazone for at least two years. In six pooled 16 to 26 week placebo-controlled monotherapy and 16 to 24 week add-on combination therapy trials, the incidence of withdrawals due to adverse events was 4.5% for patients treated with pioglitazone and 5.8% for comparator-treated patients. The most common adverse events leading to withdrawal were related to inadequate glycemic control, although the incidence of these events was lower (1.5%) with pioglitazone than with placebo (3.0%). In the PROactive trial, the incidence of withdrawals due to adverse events was 9.0% for patients treated with pioglitazone and 7.7% for placebo-treated patients. Congestive heart failure was the most common serious adverse event leading to withdrawal occurring in 1.3% of patients treated with pioglitazone and 0.6% of patients treated with placebo. Common Adverse Events: 16 to 26 Week Monotherapy Trials: A summary of the incidence and type of common adverse events reported in three pooled 16 to 26 week placebo-controlled monotherapy trials of pioglitazone is provided in Table 2. Terms that are reported represent those that occurred at a…