Brentuximab Vedotin

ADCETRIS is a CD30-directed antibody and microtubule inhibitor conjugate indicated for treatment of:

• Adult patients with previously untreated Stage III or IV classical Hodgkin lymphoma (cHL), in combination with doxorubicin, vinblastine, and dacarbazine ( 1.1 ).
• Pediatric patients 2 years and older with previously untreated high risk classical Hodgkin lymphoma (cHL), in combination with doxorubicin, vincristine, etoposide, prednisone, and cyclophosphamide ( 1.2 ).
• Adult patients with classical Hodgkin lymphoma (cHL) at high risk of relapse or progression as post-autologous hematopoietic stem cell transplantation (auto-HSCT) consolidation ( 1.3 ).
• Adult patients with classical Hodgkin lymphoma (cHL) after failure of auto-HSCT or after failure of at least two prior multi-agent chemotherapy regimens in patients who are not auto-HSCT candidates ( 1.4 ).
• Adult patients with previously untreated systemic anaplastic large cell lymphoma (sALCL) or other CD30-expressing peripheral T-cell lymphomas (PTCL), including angioimmunoblastic T-cell lymphoma and PTCL not otherwise specified (NOS), in combination with cyclophosphamide, doxorubicin, and prednisone ( 1.5 ).
• Adult patients with systemic anaplastic large cell lymphoma (sALCL) after failure of at least one prior multi-agent chemotherapy regimen ( 1.6 ).
• Adult patients with primary cutaneous anaplastic large cell lymphoma (pcALCL) or CD30-expressing mycosis fungoides (MF) who have received prior systemic therapy ( 1.7 ).
• Adult patients with relapsed or refractory large B-cell lymphoma (LBCL), including diffuse large B-cell lymphoma (DLBCL) NOS, DLBCL arising from indolent lymphoma, or high-grade B-cell lymphoma (HGBL), after two or more lines of systemic therapy who are not eligible for auto-HSCT or CAR T-cell therapy, in combination with lenalidomide and a rituximab product ( 1.8 ).

1.1 Previously Untreated Stage III or IV Classical Hodgkin Lymphoma (cHL), in Combination with Chemotherapy ADCETRIS is indicated for the treatment of adult patients with previously untreated Stage III or IV cHL, in combination with doxorubicin, vinblastine, and dacarbazine.

1.2 Previously Untreated High Risk Classical Hodgkin Lymphoma (cHL), in Combination with Chemotherapy ADCETRIS is indicated for the treatment of pediatric patients 2 years and older with previously untreated high risk cHL, in combination with doxorubicin, vincristine, etoposide, prednisone, and cyclophosphamide.

1.3 Classical Hodgkin Lymphoma (cHL) Consolidation ADCETRIS is indicated for the treatment of adult patients with cHL at high risk of relapse or progression as post-autologous hematopoietic stem cell transplantation (auto-HSCT) consolidation.

1.4 Relapsed Classical Hodgkin Lymphoma (cHL) ADCETRIS is indicated for the treatment of adult patients with cHL after failure of auto-HSCT or after failure of at least two prior multi-agent chemotherapy regimens in patients who are not auto-HSCT candidates.

1.5 Previously Untreated Systemic Anaplastic Large Cell Lymphoma (sALCL) or Other CD30-Expressing Peripheral T-cell Lymphomas (PTCL), in Combination with Chemotherapy ADCETRIS is indicated for the treatment of adult patients with previously untreated sALCL or other CD30-expressing PTCL, including angioimmunoblastic T-cell lymphoma and PTCL not otherwise specified (NOS), in combination with cyclophosphamide, doxorubicin, and prednisone.

1.6 Relapsed Systemic Anaplastic Large Cell Lymphoma (sALCL) ADCETRIS is indicated for the treatment of adult patients with sALCL after failure of at least one prior multi-agent chemotherapy regimen.

1.7 Relapsed Primary Cutaneous Anaplastic Large Cell Lymphoma (pcALCL) or CD30-Expressing Mycosis Fungoides (MF) ADCETRIS is indicated for the treatment of adult patients with pcALCL or CD30-expressing MF who have received prior systemic therapy.

1.8 Relapsed or Refractory Large B-Cell Lymphoma (LBCL) ADCETRIS in combination with lenalidomide and a rituximab product is indicated for the treatment of adult patients with relapsed or refractory LBCL, including diffuse large B-cell lymphoma (DLBCL) NOS, DLBCL arising from indolent lymphoma, or high-grade B-cell lymphoma (HGBL), after two or more lines of systemic therapy who are not eligible for auto-HSCT or chimeric antigen receptor (CAR) T-cell therapy.

For injection: 50 mg of brentuximab vedotin as a sterile, white to off-white lyophilized, preservative-free cake or powder in a single-dose vial for reconstitution. For injection: 50 mg lyophilized powder in a single-dose vial (3) .

ADCETRIS is contraindicated with concomitant bleomycin due to pulmonary toxicity (e.g., interstitial infiltration and/or inflammation) [see Adverse Reactions (6.1) ] . Concomitant use with bleomycin due to pulmonary toxicity (4) .

• Peripheral neuropathy : Monitor patients for neuropathy and institute dose modifications accordingly ( 5.1 ).
• Anaphylaxis and infusion reactions : If an infusion reaction occurs, interrupt the infusion. If anaphylaxis occurs, immediately discontinue the infusion ( 5.2 ).
• Hematologic toxicities : Monitor complete blood counts. Monitor for signs of infection. Manage using dose delays and growth factor support ( 5.3 ).
• Serious infections and opportunistic infections : Closely monitor patients for the emergence of bacterial, fungal or viral infections ( 5.4 ).
• Tumor lysis syndrome : Closely monitor patients with rapidly proliferating tumor or high tumor burden ( 5.5 ).
• Hepatotoxicity : Monitor liver enzymes and bilirubin ( 5.8 ).
• Pulmonary toxicity : Monitor patients for new or worsening symptoms ( 5.10 ).
• Serious dermatologic reactions : Discontinue if Stevens-Johnson syndrome or toxic epidermal necrolysis occurs ( 5.11 ).
• Gastrointestinal complications : Monitor patients for new or worsening symptoms ( 5.12 ).
• Hyperglycemia : Monitor patients for new or worsening hyperglycemia. Manage with anti-hyperglycemic medications as clinically indicated ( 5.13 ).
• Embryo-Fetal toxicity : Can cause fetal harm. Advise females of reproductive potential and males with female partners of reproductive potential of the potential risk to a fetus and to use effective contraception ( 5.14 , 8.1 , 8.3 ).

5.1 Peripheral Neuropathy ADCETRIS treatment causes a peripheral neuropathy that is predominantly sensory. Cases of peripheral motor neuropathy have also been reported. ADCETRIS-induced peripheral neuropathy is cumulative. In studies of ADCETRIS as monotherapy, 62% of patients experienced any grade of peripheral neuropathy. The median time to onset was 3 months (range, 0–12). Of the patients who experienced neuropathy, 62% had complete resolution, 24% had partial improvement, and 14% had no improvement at their last evaluation. The median time from onset to resolution or improvement was 5 months (range, 0–45). Of the patients with ongoing neuropathy (38%), 71% had Grade 1, 24% had Grade 2, and 4% had Grade 3. In ECHELON-1 (Study 5), 67% of patients treated with ADCETRIS + AVD experienced any grade of peripheral neuropathy. The median time to onset of any grade was 2 months (range, 0–7), of Grade 2 was 3 months (range, 0–6) and of Grade 3 was 4 months (range, <1–7). By the time of the primary analysis, 43% of affected patients had complete resolution, 24% had partial improvement, and 33% had no improvement at their last evaluation. The median time from onset to resolution or improvement of any grade was 2 months (range, 0–32). At the updated analysis of ECHELON-1, 72% of the patients who experienced peripheral neuropathy had complete resolution, 14% had partial improvement, and 14% had no improvement. The median time to partial improvement was 2.9 months (range, <1–50), and the median time to complete resolution was 6.6 months (range, <1–67). Of the patients with ongoing neuropathy (28%), 57% had Grade 1, 30% had Grade 2, 12% had Grade 3, and <1% had Grade 4. In ECHELON-2 (Study 6), 52% of patients treated with ADCETRIS + CHP experienced new or worsening peripheral neuropathy of any grade (by maximum grade, 34% Grade 1, 15% Grade 2, 3% Grade 3, <1% Grade 4). The peripheral neuropathy was predominantly sensory (94% sensory, 16% motor) and had a median onset time of 2 months (range, <1–5). At last evaluation, 50% had complete resolution of neuropathy, 12% had partial improvement, and 38% had no improvement. The median time to resolution or improvement overall was 4 months (range, 0–45). Of patients with ongoing neuropathy (50%), 72% had Grade 1, 25% had Grade 2, and 3% had Grade 3. In AHOD1331 (Study 7), 20% of pediatric patients treated with ADCETRIS + AVEPC experienced peripheral neuropathy of any grade (7% Grade 3, <1% Grade 4). Peripheral neuropathy was predominantly sensory. Of the patients who experienced peripheral neuropathy, 81% experienced sensory neuropathy and 29% experienced motor neuropathy. In ECHELON-3 (Study 8), 27% of patients treated with ADCETRIS + lenalidomide + a rituximab product experienced peripheral neuropathy of any grade (by maximum grade, 14% Grade 1, 7% Grade 2, 5% Grade 3). The peripheral neuropathy was predominantly sensory and had a median onset time of 3 months (range, <1-10). Peripheral neuropathy resulted in ADCETRIS dose reduction in 6% of treated patients, and permanent discontinuation in 4.5%. At last evaluation, 7% of the patients who experienced peripheral neuropathy had complete resolution of neuropathy, 10% had partial improvement, and 83% had no improvement. The median time to resolution was 2 months (range <1-3). The median time to improvement was 4 months (range, 3-4). Of patients who experienced peripheral neuropathy, 93% had ongoing peripheral neuropathy (47% had Grade 1, 33% had Grade 2, and 13% had Grade 3). Monitor patients for symptoms of neuropathy, such as hypoesthesia, hyperesthesia, paresthesia, discomfort, a burning sensation, neuropathic pain, or weakness. Patients experiencing new or worsening peripheral neuropathy may require a delay, change in dose, or discontinuation of ADCETRIS [see Dosage and Administration (2.3) and Adverse Reactions (6.1) ] .

5.2 Anaphylaxis and Infusion Reactions Infusion-related reactions, including anaphylaxis, have occurred with ADCETRIS. Monitor patients during infusion. If anaphylaxis occurs, immediately and permanently discontinue administration of ADCETRIS and administer appropriate medical therapy. If an infusion-related reaction occurs, interrupt the infusion and institute appropriate medical management. Patients who have experienced a prior infusion-related reaction should be premedicated for subsequent infusions. Premedication may include acetaminophen, an antihistamine, and a corticosteroid.

5.3 Hematologic Toxicities Fatal and serious cases of febrile neutropenia have been reported with ADCETRIS. Prolonged (≥1 week) severe neutropenia and Grade 3 or Grade 4 thrombocytopenia or anemia can occur with ADCETRIS. Start primary prophylaxis with G‑CSF beginning with Cycle 1 for adult patients who receive ADCETRIS in combination for previously untreated Stage III or IV cHL or previously untreated PTCL or relapsed or refractory LBCL, and pediatric patients who receive ADCETRIS in combination with chemotherapy for previously untreated high risk cHL [see Dosage and Administration (2.3) and Adverse Reactions (6.1) ] . Monitor complete blood counts prior to each dose of ADCETRIS. Monitor more frequently for patients with Grade 3 or 4 neutropenia. Monitor patients for fever. If Grade 3 or 4 neutropenia develops, consider dose delays, reductions, discontinuation, or G-CSF prophylaxis with subsequent ADCETRIS doses [see Dosage and Administration (2.2 , 2.3) ] .

5.4 Serious Infections and Opportunistic Infections Serious infections and opportunistic infections such as pneumonia, bacteremia, and sepsis or septic shock (including fatal outcomes) have been reported in patients treated with ADCETRIS. Monitor patients closely during treatment for the emergence of possible bacterial, fungal, or viral infections.

5.5 Tumor Lysis Syndrome Patients with rapidly proliferating tumor and high tumor burden may be at increased risk of tumor lysis syndrome. Monitor closely and take appropriate measures.

5.6 Increased Toxicity in the Presence of Severe Renal Impairment The frequency of ≥ Grade 3 adverse reactions and deaths was greater in patients with severe renal impairment compared to patients with normal renal function. Due to higher MMAE exposure, ≥Grade 3 adverse reactions may be more frequent in patients with severe renal impairment compared to patients with normal renal function. Avoid the use of ADCETRIS in patients with severe renal impairment [creatinine clearance (CrCL) <30 mL/min] [see Use in Specific Populations (8.6) ]. […]

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

• Peripheral Neuropathy [see Warnings and Precautions (5.1) ]
• Anaphylaxis and Infusion Reactions [see Warnings and Precautions (5.2) ]
• Hematologic Toxicities [see Warnings and Precautions (5.3) ]
• Serious Infections and Opportunistic Infections [see Warnings and Precautions (5.4) ]
• Tumor Lysis Syndrome [see Warnings and Precautions (5.5) ] o Increased Toxicity in the Presence of Severe Renal Impairment [see Warnings and Precautions (5.6) ]
• Increased Toxicity in the Presence of Moderate or Severe Hepatic Impairment [see Warnings and Precautions (5.7) ]
• Hepatotoxicity [see Warnings and Precautions (5.8) ]
• Progressive Multifocal Leukoencephalopathy [see Warnings and Precautions (5.9) ]
• Pulmonary Toxicity [see Warnings and Precautions (5.10) ]
• Serious Dermatologic Reactions [see Warnings and Precautions (5.11) ]
• Gastrointestinal Complications [see Warnings and Precautions (5.12) ]
• Hyperglycemia [see Warnings and Precautions (5.13) ] The most common adverse reactions (≥20%) are peripheral neuropathy, nausea, fatigue, musculoskeletal pain, constipation, diarrhea, vomiting, pyrexia, upper respiratory tract infection, mucositis, abdominal pain, and rash. The most common laboratory abnormalities (≥20%) are decreased neutrophils, increased creatinine, decreased hemoglobin, decreased lymphocytes, increased glucose, increased alanine aminotransferase (ALT), and increased aspartate aminotransferase (AST) ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Seagen Inc. at 1-855-473-2436 or FDA at 1-800-FDA-1088 or www.fda.gov/Safety/MedWatch .

6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The data below reflect exposure to ADCETRIS in 931 adult patients with cHL including 662 patients who received ADCETRIS in combination with chemotherapy in a randomized controlled trial, 269 who received ADCETRIS as monotherapy (167 in a randomized controlled trial and 102 in a single arm trial), and 296 pediatric patients with high risk cHL who received ADCETRIS in combination with chemotherapy. Data summarizing ADCETRIS exposure are also provided for 347 patients with T-cell lymphoma, including 223 patients with PTCL who received ADCETRIS in combination with chemotherapy in a randomized, double-blind, controlled trial; 58 patients with sALCL who received ADCETRIS monotherapy in a single-arm trial; and 66 patients with pcALCL or CD30-expressing MF who received ADCETRIS monotherapy in a randomized, controlled trial. ADCETRIS was administered intravenously at a dose of either 1.2 mg/kg every 2 weeks in combination with AVD, 1.8 mg/kg every 3 weeks in combination with AVEPC in pediatric patients, 1.8 mg/kg every 3 weeks in combination with CHP, or 1.8 mg/kg every 3 weeks as monotherapy. The most common adverse reactions (≥20%) with monotherapy in adult patients were peripheral neuropathy, fatigue, upper respiratory tract infection, musculoskeletal pain, nausea, diarrhea, pyrexia, rash, and cough. The most common laboratory abnormalities (≥20%) with monotherapy in adult patients were decreased neutrophils, increased creatinine, increased glucose, increased aspartate aminotransferase (AST), increased alanine aminotransferase (ALT), decreased lymphocytes, decreased hemoglobin, and decreased platelets. The most common adverse reactions (≥20%) with combination therapy in adult patients were peripheral neuropathy, nausea, fatigue, musculoskeletal pain, constipation, diarrhea, mucositis, vomiting, abdominal pain, pyrexia, alopecia, upper respiratory tract infection, and rash. The most common laboratory abnormalities (≥20%) with combination therapy in adult patients were decreased neutrophils, increased creatinine, decreased hemoglobin, decreased lymphocytes, increased ALT, increased AST, increased glucose, and increased uric acid. The most common Grade ≥3 adverse reactions (≥5%) in combination with AVEPC in pediatric patients were neutropenia, anemia, thrombocytopenia, febrile neutropenia, stomatitis, and infection. Previously Untreated Stage III or IV Classical Hodgkin Lymphoma (Study 5: ECHELON-1) ADCETRIS in combination with AVD was evaluated for the treatment of previously untreated patients with Stage III or IV cHL in a randomized, open-label, multicenter clinical trial of 1334 patients. Patients were randomized to receive up to 6 cycles of ADCETRIS + AVD or ABVD on Days 1 and 15 of each 28‑day cycle. The recommended starting dose of ADCETRIS was 1.2 mg/kg intravenously over 30 minutes, administered approximately 1 hour after completion of AVD therapy. A total of 1321 patients received at least one dose of study treatment (662 ADCETRIS + AVD, 659 ABVD). The median number of treatment cycles in each study arm was 6 (range, 1–6); 76% of patients on the ADCETRIS + AVD arm received 12 doses of ADCETRIS [see Clinical Studies (14.1) ] . After 75% of patients had started study treatment, the use of prophylactic G‑CSF was recommended with the initiation of treatment for all ADCETRIS + AVD treated patients, based on the observed rates of neutropenia and febrile neutropenia [see Dosage and Administration (2.2) ] . Among 579 patients on the ADCETRIS + AVD arm who did not receive G‑CSF primary prophylaxis beginning with Cycle 1, 96% experienced neutropenia (21% with Grade 3; 67% with Grade 4), and 21% had febrile neutropenia (14% with Grade 3; 6% with Grade 4). Among 83 patients on the ADCETRIS + AVD arm who received G-CSF primary prophylaxis beginning with Cycle 1, 61% experienced neutropenia (13% with Grade 3; 27% with Grade 4), and 11% experienced febrile neutropenia (8% with Grade 3; 2% with Grade 4). Serious adverse reactions were reported in 43% of ADCETRIS + AVD-treated patients and 27% of ABVD-treated patients. The most common serious adverse reactions in ADCETRIS + AVD-treated patients were febrile neutropenia (17%), pyrexia (7%), neutropenia and pneumonia (3% each). Adverse reactions that led to dose delays of one or more drugs in more than 5% of ADCETRIS + AVD-treated patients were neutropenia (21%) and febrile neutropenia (8%) [see Dosage and Administration (2.2) ] . Adverse reactions led to treatment discontinuation of one or more drugs in 13% of ADCETRIS + AVD-treated patients. Seven percent of patients treated with ADCETRIS + AVD discontinued due to peripheral neuropathy. There were 9 on-study deaths among ADCETRIS + AVD-treated patients; 7 were associated with neutropenia, and none of these patients had received G-CSF prior to developing neutropenia. […]

Concomitant use of strong CYP3A4 inhibitors or inducers has the potential to affect the exposure to monomethyl auristatin E (MMAE) ( 7.1 ).

7.1 Effect of Other Drugs on ADCETRIS CYP3A4 Inhibitors: Co-administration of ADCETRIS with ketoconazole, a potent CYP3A4 inhibitor, increased exposure to MMAE [see Clinical Pharmacology (12.3) ], which may increase the risk of adverse reaction. Closely monitor adverse reactions when ADCETRIS is given concomitantly with strong CYP3A4 inhibitors.

• Moderate or severe hepatic impairment or severe renal impairment: MMAE exposure and adverse reactions are increased ( 6 , 7 , 8.6 , 8.7 ).
• Lactation: Advise women not to breastfeed ( 8.2 ).

8.1 Pregnancy Risk Summary ADCETRIS can cause fetal harm based on the findings from animal studies and the drug’s mechanism of action [see Clinical Pharmacology (12.1) ] . In animal reproduction studies, administration of brentuximab vedotin to pregnant rats during organogenesis at doses similar to the clinical dose of 1.8 mg/kg every three weeks caused embryo-fetal toxicities, including congenital malformations (see Data ). The available data from case reports on ADCETRIS use in pregnant women are insufficient to inform a drug-associated risk of adverse developmental outcomes. Advise a pregnant woman of the potential risk to a fetus. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. 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. Data Animal Data In an embryo-fetal developmental study, pregnant rats received 2 intravenous doses of 0.3, 1, 3, or 10 mg/kg brentuximab vedotin during the period of organogenesis (once each on Pregnancy Days 6 and 13). Drug-induced embryo-fetal toxicities were seen mainly in animals treated with 3 and 10 mg/kg of the drug and included increased early resorption (≥99%), post-implantation loss (≥99%), decreased numbers of live fetuses, and external malformations (i.e., umbilical hernias and malrotated hindlimbs). Systemic exposure in animals at the brentuximab vedotin dose of 3 mg/kg is approximately the same exposure in patients with cHL or sALCL who received the recommended dose of 1.8 mg/kg every three weeks.

8.2 Lactation Risk Summary There is no information regarding the presence of brentuximab vedotin in human milk, the effects on the breastfed child, or the effects on milk production. Because of the potential for serious adverse reactions in a breastfed child from ADCETRIS, including cytopenias and neurologic or gastrointestinal toxicities, advise patients that breastfeeding is not recommended during ADCETRIS treatment.

8.3 Females and Males of Reproductive Potential ADCETRIS can cause fetal harm based on the findings from animal studies and the drug’s mechanism of action [see Use in Specific Populations (8.1) ] . Pregnancy Testing Verify the pregnancy status of females of reproductive potential prior to initiating ADCETRIS therapy. Contraception Females Advise females of reproductive potential to use effective contraception during ADCETRIS treatment and for 2 months after the last dose of ADCETRIS. Advise females to immediately report pregnancy [see Use in Specific Populations (8.1) ]. Males ADCETRIS may damage spermatozoa and testicular tissue, resulting in possible genetic abnormalities. Males with female sexual partners of reproductive potential should use effective contraception during ADCETRIS treatment and for 4 months after the last dose of ADCETRIS [see Nonclinical Toxicology (13.1) ]. Infertility Females Based on findings in animal studies with MMAE-containing antibody-drug conjugates (ADCs), ADCETRIS may impair female fertility. The effect on fertility is reversible [see Nonclinical Toxicology (13.1) ]. Males Based on findings in rats, male fertility may be compromised by treatment with ADCETRIS [see Nonclinical Toxicology (13.1) ].

8.4 Pediatric Use The safety and effectiveness of ADCETRIS have been established in pediatric patients age 2 years and older with previously untreated high risk classical Hodgkin lymphoma in combination with doxorubicin, vincristine, etoposide, prednisone, and cyclophosphamide. The safety and effectiveness of ADCETRIS have not been established for all other indications [see Indications and Usage (1) ] . Previously Untreated, High Risk Classical Hodgkin Lymphoma (cHL) in Combination with Doxorubicin, Vincristine, Etoposide, Prednisone, and Cyclophosphamide The safety and effectiveness of ADCETRIS have been established in pediatric patients 2 years and older with previously untreated high risk cHL in combination with doxorubicin, vincristine, etoposide, prednisone, and cyclophosphamide chemotherapy. Use of ADCETRIS for this indication is supported by evidence from Study 7: AHOD1331, a randomized study which included pediatric patients with previously untreated high risk cHL, including patients in the following age groups: 9 patients 3 to less than 6 years of age, 81 patients 6 to less than 12 years of age, and 345 patients 12 to less than 17 years of age [see Adverse Reactions (6.1) and Clinical Studies (14.1) ] . The safety and efficacy of ADCETRIS have not been established for this indication in patients younger than 2 years. Previously Untreated High Risk Classical Hodgkin Lymphoma (cHL) in Combination with Etoposide, Prednisone, Doxorubicin, Cyclophosphamide, Prednisone, and Dacarbazine The safety and effectiveness of ADCETRIS in combination with etoposide (E), prednisone (P), and doxorubicin (A)/cyclophosphamide (C), prednisone (P), and dacarbazine (Dac) (AEPA/CAPDac) were assessed but have not been established based on a single arm, open-label trial (NCT01920932) in 77 patients, which included 48 pediatric patients age 6 to less than 17 with previously untreated high risk (IIB, IIIB, IVA, or IVB) cHL. No new safety signals were identified in this study. Relapsed or Refractory Classical HL (cHL) ADCETRIS in Combination with Gemcitabine The safety and effectiveness of ADCETRIS in combination with gemcitabine were assessed but have not been established based on a study (NCT01780662) in 45 patients, which included 18 pediatric patients age 5 to less than 17 with relapsed or refractory cHL. No new safety signals were identified in this study. ADCETRIS Monotherapy The safety and effectiveness of ADCETRIS monotherapy was assessed but have not been established based on a study (NCT01492088) in 36 patients, which included 15 pediatric patients age 8 to less than 17 with relapsed or refractory cHL. No new safety signals were identified in this study. Relapsed or Refractory Systemic ALCL (sALCL) ADCETRIS monotherapy The safety and effectiveness of ADCETRIS monotherapy was assessed but have not been established based on a study (NCT01492088) in 36 patients, which included 16 pediatric patients age 7 to less than 17 with sALCL. No new safety signals were identified in this study. Newly Diagnosed ALK+ ALCL The safety and effectiveness of ADCETRIS in combination with alternating chemotherapy Courses A (dexamethasone, ifosfamide, methotrexate, etoposide, cytarabine) and B (dexamethasone, methotrexate, cyclophosphamide, doxorubicin) administered every 21 days for a total of 6 cycles was assessed but have not been established based on a study (NCT01979536) in 67 patients, which included 61 pediatric patients age 2 to less than 17 years with newly diagnosed ALK+ ALCL. No new safety signals were identified in this study.

8.5 Geriatric Use In the clinical trial of ADCETRIS in combination with AVD for patients with previously untreated Stage III or IV cHL (Study 5: ECHELON-1), 9% of ADCETRIS + AVD-treated patients were age 65 and older. Older age was a risk factor for febrile neutropenia, occurring in 39% of patients who were age 65 and older versus 17% of patients less than age 65, who received ADCETRIS + AVD [see Dosage and Administration (2.3) ]. The ECHELON-1 trial did not contain sufficient information on patients age 65 and older to determine whether they respond differently from younger patients [see Clinical Studies (14.1) ] . […]

CD30 is a member of the tumor necrosis factor receptor family and is expressed on the surface of sALCL cells and on Hodgkin Reed-Sternberg (HRS) cells in cHL. CD30 is variably expressed in other T-cell lymphomas. Expression of CD30 on healthy tissue and cells is limited. In vitro data suggest that signaling through CD30-CD30L binding may affect cell survival and proliferation. Brentuximab vedotin is an antibody-drug conjugate (ADC). The antibody is a chimeric IgG1 directed against CD30. The small molecule, MMAE, is a microtubule-disrupting agent. MMAE is covalently attached to the antibody via a linker. Nonclinical data suggest that the anticancer activity of ADCETRIS is due to the binding of the ADC to CD30-expressing cells, followed by internalization of the ADC‑CD30 complex, and the release of MMAE via proteolytic cleavage. Binding of MMAE to tubulin disrupts the microtubule network within the cell, subsequently inducing cell cycle arrest and apoptotic death of the cells. Additionally, in vitro data provide evidence for antibody-dependent cellular phagocytosis (ADCP).