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Drug Safety-related Labeling Changes (SrLC)

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MEGACE ES (NDA-021778)

(MEGESTROL ACETATE)

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

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12/18/2018 (SUPPL-24)

Approved Drug Label (PDF)

5 Warnings and Precautions

5.2 Fetal Toxicity

(subsection revised, additions and revisions underlined)

Based on animal studies, megestrol acetate may cause fetal harm when administered to a pregnant woman. Pregnant rats treated with low doses of megestrol acetate resulted in a reduction in fetal weight and number of live births, and feminization of male fetuses. There are no available human data to assess for any drug associated risks of miscarriage, birth defects, or adverse maternal or fetal outcomes. If this drug is used during pregnancy, or if the patient becomes pregnant while taking (receiving) this drug, advise the patient of the potential hazard to the fetus.

Obtain a pregnancy test in females of reproductive potential prior to initiating treatment with Megace ES.Advise females of reproductive potential to use effective contraception while taking Megace ES.

6 Adverse Reactions

6.1 Serious and Otherwise Important Adverse Reactions

(addition underlined)

  • Diabetes

8 Use in Specific Populations

8.1 Pregnancy

(PLLR conversion)

Risk Summary

Based on animal data, megestrol acetate may cause fetal harm when administered to a pregnant woman and is contraindicated during pregnancy. There are no available human data to assess for any drug-associated risks of miscarriage, birth defects, or adverse maternal or fetal outcomes. There are no adequate animal developmental toxicity data at clinically relevant doses. Pregnant rats treated with low doses of megestrol acetate resulted in a reduction in fetal weight and number of live births, and feminization of male fetuses at doses below maximum recommended clinical dosing based on body surface area (see Data). Advise a pregnant women of the potential risk to the fetus.

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and of miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.

Data

Reproduction studies were performed in pregnant rats at oral doses ranging from 0.05 to

12.5 mg/kg/day, which are below the maximum recommended clinical dose based on body surface area. Reduction in fetal weight and number of live births were observed at 12.5 mg/kg/day (5 times lower than the maximum clinical dose) when dams were dosed on days 12 through 18 of pregnancy. Feminization of male fetuses also occurred when dams were dosed on days 13 through 20 of pregnancy at 3 mg/kg/day, approximately 22 times below the maximum clinical dose.

8.2 Lactation

(PLLR conversion)

Risk Summary

The Centers for Disease Control and Prevention recommend that HIV-1 infected mothers not breastfeed their infants to avoid risking postnatal transmission of HIV-1. Megestrol acetate is present in human milk. There are no data on the effects of megesterol acetate on the breastfed infant or the effects on milk production. Because of the potential for HIV transmission and adverse effects on a breastfed infant, instruct mothers not to breastfeed if they are taking Megace ES.

8.3 Females and Males of Reproductive Potential

(PLLR conversion)

Pregnancy testing

Pregnancy testing is recommended prior to treatment with Megace ES.

Contraception

Megace ES may cause fetal harm when administered during pregnancy. Advise females of reproductive potential to use effective contraception during treatment with Megace ES.

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

PATIENT COUNSELING INFORMATION

(additions underlined)

  • Fetal Toxicity

    • Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females to inform their healthcare provider of a known or suspected pregnancy.

    • Advise female patients of reproductive potential to use effective contraception during treatment with Megace ES oral suspension.

  • Lactation

  • Advise mothers not to breastfeed because of the risk of passing the HIV-1 virus to the baby in breast milk.

Other

(PLLR conversion)