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Drug Safety-related Labeling Changes (SrLC)

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GAVRETO (NDA-213721)

(PRALSETINIB)

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

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12/22/2025 (SUPPL-16)

Approved Drug Label (PDF)

Boxed Warning

Newly added section

WARNING: SERIOUS INFECTIONS, INCLUDING OPPORTUNISTIC INFECTIONS

GAVRETO may increase the risk for serious infections, including bacterial, fungal, viral and opportunistic infections, which can lead to hospitalization or death. Withhold, reduce the dose or permanently discontinue GAVRETO based on severity [see Dosage and Administration (2.3), Warnings and Precautions (5.1)].


5 Warnings and Precautions

Newly added subsection:

5.1 Serious Infections, Including Opportunistic Infections

GAVRETO may increase the risk for serious infections, including fatal and opportunistic infections. In the AcceleRET-Lung trial [see Adverse Reactions (6.1)], infections occurred in 72% of patients who received GAVRETO, including 18% with Grade 3 and 3.7% with Grade 4 and 7% with fatal outcomes. Among the patients who received chemotherapy/immunotherapy, infections occurred in 52%, including 10% with Grade 3. Infections in the GAVRETO arm included pneumonia, urinary tract infection, opportunistic infections (such as pneumocystis jirovecii pneumonia, and fungal infections) and others. Monitor patients for signs and symptoms of infection and treat appropriately. Withhold, reduce the dose, or permanently discontinue GAVRETO based on severity [see Dosage and Administration (2.3)].


6 Adverse Reactions

Additions and/or revisions underlined:

The following clinically significant adverse reactions are described elsewhere in the labeling:

  • Serious Infections, including Opportunistic Infections [see Warnings and Precautions (5.1)]

. . .

6.1 Clinical Trials Experience

Additions and/or revisions underlined:

. . .

In addition to the 540 patients, certain subsections in the WARNINGS AND PRECAUTIONS describe adverse reactions observed with exposure to GAVRETO as a single agent in a randomized, open-label study, AcceleRET-Lung (NCT04222972), which enrolled 223 patients with RET-fusion positive locally advanced unresectable or metastatic NSCLC.

. . .

Other Clinical Trials Experience

AcceleRET-Lung trial (NCT04222972)

In AcceleRET-Lung trial (NCT04222972), single agent GAVRETO (n=108) was compared to chemotherapy/immunotherapy (n=104) in patients with RET fusion-positive NSCLC. Adverse reactions were infections (72% vs. 52%), including pneumonia (29% vs. 6%), urinary tract infection (22% vs. 8%), and opportunistic infections (20% vs. 6%). Opportunistic infections included pneumocystis jirovecii pneumonia, fungal infections, legionella pneumonia, cytomegalovirus infection, and herpes simplex.


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

MEDICATION GUIDE

Newly added Medication Guide; please refer to label for complete information.


PATIENT COUNSELING INFORMATION

Additions and/or revisions underlined:

Advise the patient to read the FDA-approved patient labeling (Medication Guide). Serious Infections, Including Opportunistic Infections

Advise patients that GAVRETO may increase the risk of serious infections and to contact their healthcare provider if they experience symptoms of infections [see Warnings and Precautions (5.1)].

. . .


03/22/2024 (SUPPL-15)

Approved Drug Label (PDF)

8 Use in Specific Populations

8.6 Hepatic Impairment

Additions and/or revisions underlined:

No dose adjustment is required for patients with mild (total bilirubin less than or equal to ULN and AST > ULN or total bilirubin > 1 to 1.5 × ULN and any AST), moderate (total bilirubin > 1.5 to 3 × ULN and any AST) or severe (total bilirubin > 3 × ULN and any AST) hepatic impairment.

08/09/2023 (SUPPL-9)

Approved Drug Label (PDF)

5 Warnings and Precautions

5.1 Interstitial Lung Disease/Pneumonitis

Additions and/or revisions underlined:

Severe, life-threatening, and fatal interstitial lung disease (ILD) / pneumonitis can occur in patients treated with GAVRETO. Pneumonitis occurred in 12% of patients who received GAVRETO, including 3.3% with Grade 3-4, and 0.2% with fatal reactions.

5.2 Hypertension

Additions and/or revisions underlined:

Hypertension occurred in 35% of patients, including Grade 3 hypertension in 18% of patients [see Adverse Reactions (6.1)]. Overall, 8% had their dose interrupted and 4.8% had their dose reduced for hypertension. Treatment-emergent hypertension was most commonly managed with anti-hypertension medications.

5.3 Hepatoxicity

Additions and/or revisions underlined:

Serious hepatic adverse reactions occurred in 1.5% of patients treated with GAVRETO. Increased AST occurred in 49% of patients, including Grade 3 or 4 in 7% and increased ALT occurred in 37% of patients, including Grade 3 or 4 in 4.8% [see Adverse Reactions (6.1)]. The median time to first onset for increased AST was 15 days (range: 5 days to 2.5 years) and for increased ALT was 24 days (range: 7 days to 3.7 years).

5.4 Hemorrhagic Events

Additions and/or revisions underlined:

Serious, including fatal, hemorrhagic events can occur with GAVRETO. Grade greater than or equal to 3 hemorrhagic events occurred in 4.1% of patients treated with GAVRETO including one patient with a fatal hemorrhagic event.

 

6 Adverse Reactions

Addition of the following to the bulleted line listing:

  • Embryo-Fetal Toxicity [see Warnings and Precautions (5.7)]

6.1 Clinical Trials Experience

Extensive additions and/or revisions, please refer to label for complete information.

8 Use in Specific Populations

8.4 Pediatric Use

Additions and/or revisions underlined:

The safety and effectiveness of GAVRETO have been established in pediatric patients aged 12 years and older for RET fusion-positive thyroid cancer. Use of GAVRETO in this age group is supported by evidence from an adequate and well-controlled study of GAVRETO in adults with additional population pharmacokinetic data demonstrating that age and body weight had no clinically meaningful effect on the pharmacokinetics of pralsetinib, that the exposure of pralsetinib is expected to be similar between adults and pediatric patients age 12 years and older, and that the course of RET fusion-positive thyroid cancer is sufficiently similar in adults and pediatric patients to allow extrapolation of data in adults to pediatric patients [see Adverse Reactions (6.1), Clinical Pharmacology (12.3), and Clinical Studies (14.2)].

The safety and effectiveness of GAVRETO have not been established in pediatric patients with RET fusion-positive NSCLC or in pediatric patients younger than 12 years old with RET fusion- positive thyroid cancer.

8.5 Geriatric Use

Additions and/or revisions underlined:

Of the 540 patients in ARROW who received the recommended dose of GAVRETO at 400 mg once daily, 31% were 65 years or and over, while 7% were 75 years and over.

No overall differences in pharmacokinetics (PK), safety or effectiveness were observed between patients aged 65 years or older and younger patients.

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

PATIENT INFORMATION

Additions and/or revisions underlined:

What is GAVRETO?

It is not known if GAVRETO is safe and effective when used to treat cancers caused by abnormal RET genes:

  • in children for the treatment of NSCLC or

    The most common side effects of GAVRETO include:

  • swelling of your face, arms, legs, hands, and feet (edema)

  • fever

  • cough

    The most common severe abnormal blood test results with GAVRETO include:

  • decreased white blood cell, red blood cell, and platelet counts

  • decreased levels of phosphate, body salt (sodium), calcium and potassium in the blood

  • abnormal liver function blood tests

  • increased levels of enzyme called alkaline phosphatase in the blood (test for liver or bone problems)

  • increased levels of potassium in the blood

07/20/2023 (SUPPL-14)

Approved Drug Label (PDF)

6 Adverse Reactions

6.1 Clinical Trials Experience

Additions and/or revisions underlined:


The pooled safety population in the WARNINGS AND PRECAUTIONS reflect exposure to GAVRETO as a single agent at 400 mg orally once daily in 438 patients with RET-altered solid tumors, including with RET fusion-positive NSCLC (n = 220), and RET-altered thyroid cancer ([n=138], including 19 patients with RET fusion-positive thyroid cancer), in ARROW [see Clinical Studies (14)]. Among 438 patients who received GAVRETO, 47% were exposed for 6 months or longer and 23% were exposed for greater than one year.

RET-altered Thyroid Cancer

The safety of GAVRETO was evaluated as a single agent at 400 mg orally once daily in 138 patients with RET-altered thyroid cancer (including 19 patients with RET fusion-positive thyroid cancer) in ARROW [see Clinical Studies (14.2)]. Among the 138 patients who received GAVRETO, 68% were exposed for 6 months or longer, and 40% were exposed for greater than one year.

06/30/2023 (SUPPL-11)

Approved Drug Label (PDF)

7 Drug Interactions

7.1 Effects of Other Drugs on GAVRETO

Additions and/or revisions underlined

Strong or Moderate CYP3A and/or P-gp Inhibitors

Concomitant use with a strong or moderate CYP3A inhibitor and/or a P-gp inhibitor increases pralsetinib exposure [Clinical Pharmacology (12.3)], which may increase the risk of adverse reactions related to GAVRETO. Avoid coadministration of GAVRETO with a strong or moderate CYP3A and/or a P-gp inhibitor. If coadministration with any of the above inhibitors cannot be avoided, reduce the GAVRETO dose [see Dosage and Administration (2.4)].

Strong or moderate CYP3A Inducers

Concomitant use with a strong or moderate CYP3A inducer decreases pralsetinib exposure [see Clinical Pharmacology (12.3)], which may decrease efficacy of GAVRETO. Avoid concomitant use of pralsetinib with strong or moderate CYP3A inducers. If coadministration of GAVRETO with strong or moderate CYP3A inducers cannot be avoided, increase the GAVRETO dose [see Dosage and Administration (2.5)]

11/10/2021 (SUPPL-4)

Approved Drug Label (PDF)

5 Warnings and Precautions

5.5 Tumor Lysis Syndrome

New subsection added

Cases of tumor lysis syndrome (TLS) have been reported in patients with medullary thyroid carcinoma receiving GAVRETO [see Adverse Reactions (6.1)]. Patients may be at risk of TLS if they have rapidly growing tumors, a high tumor burden, renal dysfunction, or dehydration.

Closely monitor patients at risk, consider appropriate prophylaxis including hydration, and treat as clinically indicated.

6 Adverse Reactions

Addition of the following to the bulleted line listing:

  • Tumor Lysis Syndrome [see Warnings and Precautions (5.5)]

6.1 Clinical Trials Experience

Extensive additions and/or revisions, please refer to label for complete information

8 Use in Specific Populations

8.1 Pregnancy

Additions and/or revisions underlined

Data

Animal Data

In an embryo-fetal development study, once daily oral administration of pralsetinib to pregnant rats during the period of organogenesis resulted in 100% post-implantation loss at dose levels

Greater than or equal to 20 mg/kg (approximately 1.8 times the human exposure based on area under the curve [AUC] at the clinical dose of 400 mg). Post-implantation loss also occurred at the 10 mg/kg dose level (approximately 0.6 times the human exposure based on AUC at the clinical dose of 400 mg).

8.4 Pediatric Use

Additions and/or revisions underlined

The safety and effectiveness of GAVRETO have been established in pediatric patients aged 12 years and older for RET-mutant MTC and RET-fusion thyroid cancer. Use of GAVRETO in this age group is supported by evidence from an adequate and well-controlled study of GAVRETO in adults with additional population pharmacokinetic data demonstrating that age and body weight had no clinically meaningful effect on the pharmacokinetics of pralsetinib, that the exposure of pralsetinib is expected to be similar between adults and pediatric patients aged 12 years and older, and that the course of RET-mutant MTC and RET-fusion thyroid cancer is sufficiently similar in adults and pediatric patients to allow extrapolation of data in adults to pediatric patients[see Adverse Reactions (6.1), Clinical Pharmacology (12.3), and Clinical Studies (14.2)].

The safety and effectiveness of GAVRETO have not been established in pediatric patients with RET fusion-positive NSCLC or in pediatric patients younger than 12 years old with RET-mutant MTC or RET-fusion thyroid cancer.

Monitor growth plates in adolescent patients with open growth plates. Consider interrupting or discontinuing therapy based on the severity of any growth plate abnormalities and based on an individual risk-benefit assessment.

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

MEDICATION GUIDE

Additions and/or revisions underlined

What is GAVRETO?

GAVRETO is a prescription medicine used to treat certain cancers caused by abnormal rearranged during transfection (RET) genes in:

  • adults with non-small cell lung cancer (NSCLC) that has spread.

  • adults and children 12 years of age and older with advanced medullary thyroid cancer (MTC) or MTC that has spread who require a medicine by mouth or injection (systemic therapy).

  • adults and children 12 years of age and older with advanced thyroid cancer or thyroid cancer that has spread who require a medicine by mouth or injection (systemic therapy) and who have received radioactive iodine and it did not work or is no longer working.

    Your healthcare provider will perform a test to make sure that GAVRETO is right for you. It is not known if GAVRETO is safe and effective in children younger than 12 years of age.

    Before taking GAVRETO, tell your healthcare provider about all of your medical conditions, including if you:

  • plan to have surgery. You should stop taking GAVRETO at least 5 days before your planned surgery. See “What are the possible side effects of GAVRETO?”

    What are the possible side effects of GAVRETO?

    GAVRETO may cause serious side effects, including:

  • Tumor lysis syndrome (TLS). TLS is caused by a fast breakdown of cancer cells. TLS can cause you to have kidney failure and the need for dialysis treatment, an abnormal heartbeat, and may sometimes lead to hospitalization. Your healthcare provider may do blood tests to check you for TLS. You should stay well hydrated during treatment with GAVRETO. Call your healthcare provider or get emergency medical help right away if you develop any of these symptoms during treatment with GAVRETO:

    • nausea        o         shortness of breath

    • vomiting      o         muscle cramps

    • weakness    o         seizures

    • swelling

PATIENT COUNSELING INFORMATION

Additions and/or revisions underlined

Tumor Lysis Syndrome

Advise patients to contact their healthcare provider promptly to report any signs and symptoms of TLS [see Warnings and Precautions (5.5)].

Administration

Advise patients to take GAVRETO on an empty stomach (no food intake for at least 2 hours before and at least 1 hour after taking GAVRETO) [see Dosage and Administration (2.2)].