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Drug Safety-related Labeling Changes (SrLC)

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ACTOS (NDA-021073)

(PIOGLITAZONE HYDROCHLORIDE)

Safety-related Labeling Changes Approved by FDA Center for Drug Evaluation and Research (CDER)

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12/21/2017 (SUPPL-49)

Approved Drug Label (PDF)

7 Drug Interactions

7.3 Topiramate

(new subsection added)

A decrease in the exposure of pioglitazone and its active metabolites were noted with concomitant administration of pioglitazone and topiramate. The clinical relevance of this decrease is unknown; however, when ACTOS and topiramate are used concomitantly, monitor patients for adequate glycemic control.

12/12/2016 (SUPPL-48)

Approved Drug Label (PDF)

5 Warnings and Precautions

5.4 Urinary Bladder Tumors

(additions underlined)

Tumors were observed in the urinary bladder of male rats in the two-year carcinogenicity study. In addition, during the three year PROactive clinical trial, 14 patients out of 2605 (0.54%) randomized to ACTOS and 5 out of 2633 (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 ACTOS and two (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 ACTOS. During the 13 years of both PROactive and observational follow-up, the occurrence of bladder cancer did not differ between patients randomized to ACTOS or placebo (HR =1.00; [95% CI: 0.59-1.72]).

Findings regarding the risk of bladder cancer in patients exposed to ACTOS vary among observational studies; some did not find an increased risk of bladder cancer associated with ACTOS, while others did.

A large prospective10-year observational cohort study conducted in the United States found no statistically significant increase in the risk of bladder cancer in diabetic patients ever exposed to ACTOS, compared to those never exposed to ACTOS (HR =1.06 [95% CI 0.89-1.26]).

A retrospective cohort study conducted with data from the United Kingdom found a statistically significant association between ever exposure to ACTOS and bladder cancer (HR: 1.63; [95% CI: 1.22-2.19]).

Associations between cumulative dose or cumulative duration of exposure to ACTOS and bladder cancer were not detected in some studies including the 10-year observational study in the U.S., but were in others. Inconsistent findings and limitations inherent in these and other studies preclude conclusive interpretations of the observational data.

ACTOS may be associated with an increase in the risk of urinary bladder tumors. There are insufficient data to determine whether pioglitazone is a tumor promoter for urinary bladder tumors.

Consequently, ACTOS should not be used in patients with active bladder cancer and the benefits of glycemic control versus unknown risks for cancer recurrence with ACTOS should be considered in patients with a prior history of bladder cancer.

6 Adverse Reactions

6.1 Clinical Trials Experience

(additions underlined)

Tumors were observed in the urinary bladder of male rats in the two-year carcinogenicity study. During the three year PROactive clinical trial, 14 patients out of 2605 (0.54%) randomized to ACTOS and 5 out of 2633 (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 ACTOS and two (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 ACTOS. During the 13 years of both PROactive and observational follow-up, the occurrence of bladder cancer did not differ between patients randomized to ACTOS or placebo (HR =1.00; 95% CI: 0.59-1.72)

8 Use in Specific Populations

8.1 Pregnancy

(PLLR conversion)

Risk Summary

Limited data with ACTOS in pregnant women are not sufficient to determine 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.

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 .

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 greater than 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.

 

Data

Animal Data

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 greater than or equal to 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 (approximately 35-times the 45 mg clinical dose), but reduced embryofetal viability at 160 mg/kg, or approximately 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 greater than or equal to 2 times the 45 mg clinical dose, by body surface area.

8.2 Lactation

(PLLR conversion)

Risk Summary

There is no information regarding the presence of pioglitazone in human milk, the effects on the breastfed infant, or the effects on milk production. Pioglitazone is present in rat milk; however due to species-specific differences in lactation physiology, animal data may not reliably predict drug levels in human milk. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for ACTOS and any potential adverse effects on the breastfed infant from ACTOS or from the underlying maternal condition.

8.3 Females and Males of Reproductive Potential

(PLLR conversion)

Discuss the potential for unintended pregnancy with premenopausal women as therapy with ACTOS, like other thiazolidinediones, may result in ovulation in some anovulatory women.

17 PCI/PI/MG (Patient Counseling Information/Patient Information/Medication Guide)

17 PATIENT COUNSELING INFORMATION

(addition underlined)

·       Inform female patients that treatment with ACTOS, like other thiazolidinediones, may result in an unintended pregnancy in some premenopausal anovulatory females due to its effect on ovulation.