Alogliptin and pioglitazone

Strong CYP2C8 inhibitors (e.g., gemfibrozil) increase pioglitazone concentrations. Limit the pioglitazone dose to 15 mg daily. ( 7.2 ) CYP2C8 inducers (e.g., rifampin) may decrease pioglitazone concentrations. ( 7.3 ) Topiramate may decrease pioglitazone concentrations. ( 7.4 )

7.1 Insulin Secretagogues and Insulin Insulin and insulin secretagogues are known to cause hypoglycemia. Coadministration of alogliptin and pioglitazone tablets with an insulin secretagogue (e.g., sulfonylurea) or insulin may require lower dosages of the insulin secretagogue and insulin to reduce the risk of hypoglycemia [see Warnings and Precautions (5.8) ] .

7.2 Strong CYP2C8 Inhibitors An inhibitor of CYP2C8 (e.g., gemfibrozil) significantly increases the exposure (area under the concentration-time curve [AUC]) and half-life of pioglitazone. Therefore, the maximum recommended dosage of alogliptin and pioglitazone tablets is 25 mg of alogliptin and 15 mg of pioglitazone once daily if used in combination with gemfibrozil or other strong CYP2C8 inhibitors [see Dosage and Administration (2.5) and Clinical Pharmacology (12.3) ] .

7.3 CYP2C8 Inducers 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 alogliptin and pioglitazone tablets, changes in diabetes treatment may be needed based on clinical response without exceeding the maximum recommended daily dose of alogliptin and pioglitazone tablets (25 mg of alogliptin and 45 mg of pioglitazone) [see Clinical Pharmacology (12.3) ] .

7.4 Topiramate 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 alogliptin and pioglitazone tablets and topiramate are used concomitantly, monitor patients for adequate glycemic control.

8.1 Pregnancy Risk Summary Limited data with alogliptin and pioglitazone tablets in pregnant women are not sufficient to inform a drug-associated risk for major birth defects or miscarriage. There are risks to the mother and fetus associated with poorly controlled diabetes in pregnancy [see Clinical Considerations ]. In animal reproduction studies, 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 body surface area.

No adverse developmental effects were observed when alogliptin was administered to pregnant rats and rabbits during organogenesis at exposures 180 and 149 times the 25 mg clinical dose, respectively, based on plasma drug exposure (AUC) [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, and delivery complications. Poorly controlled diabetes increases the fetal risk for major birth defects, still birth, and macrosomia related morbidity.

Data Animal Data Alogliptin and Pioglitazone Co-administration of 100 mg/kg alogliptin and 40 mg/kg pioglitazone (39 and 10 times the 25 mg and 45 mg clinical doses, respectively, based on body surface area) to pregnant rats during organogenesis slightly augmented pioglitazone-related fetal effects of delayed development and reduced fetal weights but did not result in embryofetal mortality or teratogenicity.

Alogliptin Alogliptin administered to pregnant rabbits and rats during the period of organogenesis did not cause adverse developmental effects at doses of up to 200 mg/kg and 500 mg/kg, or 149 times and 180 times, the 25 mg clinical dose, respectively, based on plasma drug exposure (AUC). Placental transfer of alogliptin into the fetus was observed following oral dosing to pregnant rats. No adverse developmental outcomes were observed in offspring when alogliptin was administered to pregnant rats during gestation and…