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Drug Safety-related Labeling Changes (SrLC)

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FASLODEX (NDA-021344)

(FULVESTRANT)

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

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05/13/2020 (SUPPL-41)

Approved Drug Label (PDF)

6 Adverse Reactions

Postmarketing Experience

(Newly added information)

The following adverse reactions have been identified during post-approval use of FASLODEX. 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.

03/11/2019 (SUPPL-37)

Approved Drug Label (PDF)

6 Adverse Reactions

6.1 Clinical Trials Experience

(Additions and/or revisions are underlined)

Combination Therapy with Ribociclib (MONALEESA-3)

The safety of FASLODEX 500 mg plus ribociclib 600 mg versus FASLODEX plus placebo was evaluated in MONALEESA-3. The data described below reflect exposure to FASLODEX plus ribociclib in 483 out of 724 postmenopausal patients with HR-positive, HER2-negative advanced or metastatic breast cancer for initial endocrine based therapy or after disease progression on endocrine therapy who received at least one dose of FASLODEX plus ribociclib or placebo in MONALEESA-3. Median duration of treatment was 15.8 months for FASLODEX plus ribociclib and 12 months for FASLODEX plus placebo.

Dose reductions due to adverse reactions occurred in 32% of patients receiving FASLODEX plus ribociclib and in 3% of patients receiving FASLODEX plus placebo. Among patients receiving FASLODEX plus ribociclib, 8% were reported to have permanently discontinued both FASLODEX plus ribociclib, and 9% were reported to have discontinued ribociclib alone due to ARs. Among patients receiving FASLODEX plus placebo, 4% were reported to have permanently discontinued both FASLODEX and placebo and 2% were reported to have discontinued placebo alone due to ARs.

Adverse reactions leading to treatment discontinuation of FASLODEX plus ribociclib (as compared to FASLODEX plus placebo) were ALT increased (5% vs. 0%), AST increased (3% vs. 0.6%), and vomiting (1% vs. 0%).

The most common adverse reactions (reported at a frequency greater than or equal to 20% on the FASLODEX plus ribociclib arm and greater than or equal to 2% higher than FASLODEX plus placebo) were neutropenia, infections, leukopenia, cough, nausea, diarrhea, vomiting, constipation, pruritus, and rash. The most frequently reported Grade 3/4 adverse reactions (reported at a frequency greater than or equal to 5%) in patients receiving FASLODEX plus ribociclib in descending frequency were neutropenia, leukopenia, infections, and abnormal liver function tests.

Adverse reactions and laboratory abnormalities occurring in patients in MONALEESA-3 are listed in Table 9 and Table 10, respectively.

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

17 PATIENT COUNSELING INFORMATION

(Additions and/or revisions are underlined)

Combination Therapy

 

When FASLODEX is used in combination palbociclib, abemaciclib, or ribociclib, refer to the respective Full Prescribing Information for Patient Counseling Information.

PATIENT INFORMATION

(Extensive changes; please refer to labeling)

07/05/2018 (SUPPL-36)

Approved Drug Label (PDF)

6 Adverse Reactions

6.1 Clinical Trials Experience

(Additions and/or revisions are underlined)

Combination Therapy with Palbociclib (PALOMA-3)

The safety of FASLODEX 500 mg plus palbociclib 125 mg/day versus FASLODEX plus placebo was evaluated in PALOMA-3. The data described below reflect exposure to FASLODEX plus palbociclib in 345 out of 517 patients with HR-positive, HER2-negative advanced or metastatic breast cancer who received at least 1 dose of treatment in PALOMA-3. The median duration of treatment for FASLODEX plus palbociclib was 10.8 months while the median duration of treatment for FASLODEX plus placebo arm was 4.8 months.

The most common adverse reactions (greater than or equal to 10%) of any grade reported in patients in the FASLODEX plus palbociclib arm by descending frequency were neutropenia, leukopenia, infections, fatigue, nausea, anemia, stomatitis, diarrhea, thrombocytopenia, vomiting, alopecia, rash, decreased appetite, and pyrexia.

The most frequently reported Grade greater than or equal to 3 adverse reactions (greater than or equal to 5%) in patients receiving FASLODEX plus palbociclib in descending frequency were neutropenia and leukopenia.

Adverse reactions (greater than or equal to 10%) reported in patients who received FASLODEX plus palbociclib or FASLODEX plus placebo in PALOMA-3 are listed in Table 5, and laboratory abnormalities are listed in Table 6.

Additional adverse reactions occurring at an overall incidence of <10.0% of patients receiving FASLODEX plus palbociclib in PALOMA-3 included asthenia (7.5%), aspartate aminotransferase increased (7.5%), dysgeusia (6.7%), epistaxis (6.7%), lacrimation increased (6.4%), dry skin (6.1%), alanine aminotransferase increased (5.8%), vision blurred (5.8%), dry eye (3.8%), and febrile neutropenia (0.9%).

11/14/2017 (SUPPL-35)

Approved Drug Label (PDF)

6 Adverse Reactions

6.1 Clinical Trials Experience

(Additions and/or revisions are underlined)

Monotherapy

Comparison of FASLODEX 500 mg and FASLODEX 250 mg (CONFIRM)

The following adverse reactions (ARs) were calculated based on the safety analysis of CONFIRM comparing…

Table 1: Adverse Reactions in CONFIRM (Greater than or Equal to 5% in Either Treatment Group) (Table has been revised; please refer to label)

Comparison of FASLODEX 500 mg and Anastrozole 1 mg (FALCON)

Table 2: Adverse Reactions in FALCON (Table has been revised; please refer to label)

Table 3: Laboratory Abnormalities in FALCON (Table has been revised; please refer to label)

Comparison of FASLODEX 250 mg and Anastrozole 1 mg in Combined Trials (Studies 0020 and 0021)

Table 4: Adverse Reactions in Studies 0020 and 0021 (Greater than or Equal to 5% from Combined Data) (Table has been revised; please refer to label)

Combination Therapy with Palbociclib (PALOMA-3)

The safety of FASLODEX 500 mg plus palbociclib 125 mg/day versus FASLODEX plus placebo was evaluated in PALOMA-3…

Combination Therapy with Abemaciclib (MONARCH 2)

The safety of FASLODEX (500 mg) plus abemaciclib (150 mg twice daily) versus FASLODEX plus placebo was evaluated in MONARCH 2. The data described below reflect exposure to FASLODEX in 664 patients with HR-positive, HER2-negative advanced breast cancer who received at least one dose of FASLODEX plus abemaciclib or placebo in MONARCH 2.

Median duration of treatment was 12 months for patients receiving FASLODEX plus abemaciclib and 8 months for patients receiving FASLODEX plus placebo.

Dose reductions due to an adverse reaction occurred in 43% of patients receiving FASLODEX plus abemaciclib. Adverse reactions leading to dose reductions greater than or equal to 5% of patients were diarrhea and neutropenia. Abemaciclib dose reduction due to diarrhea of any grade occurred in 19% of patients receiving FASLODEX plus abemaciclib compared to 0.4% of patients receiving FASLODEX plus placebo.

Abemaciclib dose reductions due to neutropenia of any grade occurred in 10% of patients receiving FASLODEX plus abemaciclib compared to no patients receiving FASLODEX plus placebo.

Permanent study treatment discontinuation due to an adverse event was reported in 9% of patients receiving FASLODEX plus abemaciclib and in 3% of patients receiving FASLODEX plus placebo. Adverse reactions leading to permanent discontinuation for patients receiving FASLODEX plus abemaciclib were infection (2%), diarrhea (1%), hepatotoxicity (1%), fatigue (0.7%), nausea (0.2%), abdominal pain (0.2%), acute kidney injury (0.2%), and cerebral infarction (0.2%).

Deaths during treatment or during the 30-day follow up, regardless of causality, were reported in 18 cases (4%) of FASLODEX plus abemaciclib treated patients versus 10 cases (5%) of FASLODEX plus placebo treated patients. Causes of death for patients receiving FASLODEX plus abemaciclib included: 7 (2%) patient deaths due to underlying disease, 4 (0.9%) due to sepsis, 2 (0.5%) due to pneumonitis, 2 (0.5%) due to hepatotoxicity, and one (0.2%) due to cerebral infarction.

The most common adverse reactions reported (greater than or equal to 20%) in the FASLODEX plus abemaciclib arm were diarrhea, fatigue, neutropenia, nausea, infections, abdominal pain, anemia, leukopenia, decreased appetite, vomiting, and headache (Table 7). The most frequently reported (Greater than or Equal to 5%) Grade 3 or 4 adverse reactions were neutropenia, diarrhea, leukopenia, anemia, and infections.

Table 7: Adverse Reactions Greater than or Equal to 10% of Patients Receiving FASLODEX Plus Abemaciclib and Greater than or Equal to 2% Higher Than FASLODEX Plus Placebo in MONARCH 2 (Table has been added; please refer to label)

Additional adverse reactions in MONARCH 2 include venous thromboembolic events (deep vein thrombosis, pulmonary embolism, cerebral venous sinus thrombosis, subclavian vein thrombosis, axillary vein thrombosis, and DVT inferior vena cava), which were reported in 5% of patients treated with FASLODEX plus abemaciclib as compared to 0.9% of patients treated with FASLODEX plus placebo.

Table 8: Laboratory Abnormalities Greater than or Equal to 10% in Patients Receiving FASLODEX Plus Abemaciclib and Greater than or Equal to 2% Higher Than FASLODEX Plus Placebo in MONARCH 2 (Table has been added; please refer to label)

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

17 PATIENT COUNSELING INFORMATION

(Additions and/or revisions are underlined)

Combination Therapy with Abemaciclib

See abemaciclib Full Prescribing Information for Patient Counseling Information.

PATIENT INFORMATION

(Additions and/or revisions are underlined)

What is FASLODEX?

FASLODEX is a prescription medicine used to treat women with:

  • HR-positive, HER2-negative advanced breast cancer or breast cancer that has spread to other parts of the body (metastatic), in combination with palbociclib or abemaciclib in women whose disease has progressed after endocrine therapy


When FASLODEX is used in combination with abemaciclib, please also see the abemaciclib Patient Information.

General information about the safe and effective use of FASLODEX

Do not use FASLODEX for a condition for which it was not prescribed. Do not give FASLODEX to other people, even if they have the same symptoms you have. It may harm them

08/25/2017 (SUPPL-34)

Approved Drug Label (PDF)

6 Adverse Reactions

6.1 Clinical Trials Experience

(additions and revisions, please refer to label)

07/12/2016 (SUPPL-29)

Approved Drug Label (PDF)

5 Warnings and Precautions

Injection Site Reaction (addition)

  • Injection site related events including sciatica, neuralgia, neuropathic pain, and peripheral neuropathy have been reported with FASLODEX injection. Caution should be taken while administering FASLODEX at the dorsogluteal injection site due to the proximity of the underlying sciatic nerve.

6 Adverse Reactions

The following adverse reactions are discussed in more detail in other sections of the labeling:
  • Injection Site Reaction

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

MG - What are the possible side effects of FASLODEX?

FASLODEX may cause injection site related nerve damage. Call your healthcare provider if you develop any of the following symptoms in your legs following a FASLODEX injection:
  • Numbness
  • Tingling
  • Weakness

05/19/2016 (SUPPL-27)

Approved Drug Label (PDF)

5 Warnings and Precautions

Immunoassay Measurement of Serum Estradiol

  • Due to structural similarity of fulvestrant and estradiol, FASLODEX can interfere with estradiol measurement by immunoassay, resulting in falsely elevated estradiol levels.

03/01/2016 (SUPPL-25)

Approved Drug Label (PDF)

5 Warnings and Precautions

Embryo-Fetal Toxicity

Based on findings from animal studies and its mechanism of action, FASLODEX can cause fetal harm when administered to a pregnant woman. In animal reproduction studies, administration of fulvestrant to pregnant rats and rabbits during organogenesis resulted in embryo-fetal toxicity at daily doses that are significantly less than the maximum recommended human dose. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with FASLODEX and for one year after the last dose.