Zestmab Injection

Rituximab (rituximab-abbs) is a CD20-directed cytolytic antibody indicated for the treatment of adult patients with: Non-Hodgkin's Lymphoma (NHL). Relapsed or refractory, low grade or follicular, CD20-positive B-cell NHL as a single agent. Previously untreated follicular, CD20-positive, B-cell NHL in combination with first line chemotherapy and, in patients achieving a complete or partial response to a rituximab product in combination with chemotherapy, as single-agent maintenance therapy. Non-progressing (including stable disease), low-grade, CD20-positive, B-cell NHL as a single agent after first-line cyclophosphamide, vincristine, and prednisone (CVP) chemotherapy. Previously untreated diffuse large B-cell, CD20-positive NHL in combination with (cyclophosphamide, doxorubicin, vincristine, and prednisone) (CHOP) or other anthracycline-based chemotherapy regimens. Chronic Lymphocytic Leukemia (CLL). Previously untreated and previously treated CD20-positive CLL in combination with fludarabine and cyclophosphamide (FC). Rheumatoid Arthritis (RA) in combination with methotrexate in adult patients with moderately-to severely-active RA who have inadequate response to one or more TNF antagonist therapies. Granulomatosis with Polyangiitis (GPA) (Wegener’s Granulomatosis) and Microscopic Polyangiitis (MPA) in adult patients in combination with glucocorticoids. Moderate to severe Pemphigus Vulgaris (PV) in adult patients Non–Hodgkin's Lymphoma (NHL) Rituximab (rituximab-abbs) is indicated for the treatment of adult patients with: Relapsed or refractory, low-grade or follicular, CD20-positive, B-cell NHL as a single agent. Previously untreated diffuse large B-cell, CD20-positive NHL in combination with cyclophosphamide, doxorubicin, vincristine, prednisone (CHOP) or other anthracycline-based chemotherapy regimens. Chronic Lymphocytic Leukemia (CLL) Rituximab is indicated, in combination with fludarabine and cyclophosphamide (FC), for the treatment of adult patients with previously untreated and previously treated CD20-positive CLL. Abridged from the full prescribing information.

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Source: US FDA prescribing information, via openFDA. Provided for general information only — it is not a substitute for your doctor's or pharmacist's advice. Always follow your prescriber's instructions.

Boxed warning. FATAL INFUSION-RELATED REACTIONS, SEVERE MUCOCUTANEOUS REACTIONS, HEPATITIS B VIRUS REACTIVATION and PROGRESSIVE MULTIFOCAL LEUKOENCEPHALOPATHY (PML) WARNING: FATAL INFUSION-RELATED REACTIONS, SEVERE MUCOCUTANEOUS REACTIONS, HEPATITIS B VIRUS REACTIVATION and PROGRESSIVE MULTIFOCAL LEUKOENCEPHALOPATHY See full prescribing information for complete boxed warning. Fatal infusion-related reactions within 24 hours of rituximab infusion; approximately 80% of fatal reactions occurred with first infusion. Monitor patients and discontinue Rituximab infusion for severe reactions. Severe mucocutaneous reactions, some with fatal outcomes. Hepatitis B virus (HBV) reactivation, in some cases resulting in fulminant hepatitis, hepatic failure, and death. Progressive multifocal leukoencephalopathy (PML) resulting in death. Infusion-Related Reactions Administration of rituximab products, including Rituximab, can result in serious, including fatal, infusion-related reactions. Deaths within 24 hours of rituximab infusion have occurred. Approximately 80% of fatal infusion-related reactions occurred in association with the first infusion. Monitor patients closely. Discontinue Rituximab infusion for severe reactions and provide medical treatment for Grade 3 or 4 infusion-related reactions. Severe Mucocutaneous Reactions Severe, including fatal, mucocutaneous reactions can occur in patients receiving rituximab products. Hepatitis B Virus (HBV) Reactivation HBV reactivation can occur in patients treated with rituximab products, in some cases resulting in fulminant hepatitis, hepatic failure, and death. Screen all patients for HBV infection before treatment initiation, and monitor patients during and after treatment with Rituximab. Discontinue Rituximab and concomitant medications in the event of HBV reactivation. Progressive Multifocal Leukoencephalopathy (PML), including fatal PML, can occur in patients receiving rituximab products. Tumor lysis syndrome: Administer aggressive intravenous hydration, anti-hyperuricemic agents, monitor renal function. Infections: Withhold Rituximab and institute appropriate anti-infective therapy. Cardiac adverse reactions: Discontinue infusions in case of serious or life-threatening events. Renal toxicity: Discontinue in patients with rising serum creatinine or oliguria. Bowel obstruction and perforation: Consider and evaluate for abdominal pain, vomiting, or related symptoms. Immunizations: Live virus vaccinations prior to or during Rituximab treatment not recommended. Embryo-Fetal toxicity: Can cause fetal harm. Advise females of reproductive potential of the potential risk to a fetus and use of effective contraception. Infusion-Related Reactions Rituximab products can cause severe, including fatal, infusion-related reactions. Abridged from the full prescribing information.

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Source: US FDA prescribing information, via openFDA. Provided for general information only — it is not a substitute for your doctor's or pharmacist's advice. Always follow your prescriber's instructions.

The following clinically significant adverse reactions are discussed in greater detail in other sections of the labeling: Infusion-related reactions Severe mucocutaneous reactions Hepatitis B reactivation with fulminant hepatitis Progressive multifocal leukoencephalopathy Tumor lysis syndrome Infections Cardiovascular adverse reactions Renal toxicity Bowel obstruction and perforation Most common adverse reactions in clinical trials were: NHL (greater than or equal to 25%): infusion-related reactions, fever, lymphopenia, chills, infection, and asthenia. CLL (greater than or equal to 25%): infusion-related reactions and neutropenia. RA (greater than or equal to 10%): upper respiratory tract infection, nasopharyngitis, urinary tract infection, and bronchitis (other important adverse reactions include infusion-related reactions, serious infections, and cardiovascular events). GPA and MPA (greater than or equal to 15 %): infections, nausea, diarrhea, headache, muscle spasms, anemia, peripheral edema, infusion-related reactions. PV (greater than or equal to 15%): infusion-related reactions, depression, upper respiratory tract infection/nasopharyngitis, headache (other important adverse reactions include infections).. Clinical Trials Experience in Lymphoid Malignancies Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the 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 clinical practice. B-Cell Malignancies The data described below reflect exposure to rituximab in 3,092 patients, with exposures ranging from a single infusion up to 2 years. Rituximab was studied in both single-arm and controlled trials (n=356 and n=2,427). The population included 1180 patients with low grade or follicular lymphoma, 927 patients with DLBCL, 676 patients with CLL, and 309 patients with another indication. Most NHL patients received rituximab as an infusion of 375 mg/m 2 per infusion, given as a single agent weekly for up to 8 doses, in combination with chemotherapy for up to 8 doses, or following chemotherapy for up to 16 doses. CLL patients received rituximab 375 mg/m 2 as an initial infusion followed by 500 mg/m 2 for up to 5 doses, in combination with fludarabine and cyclophosphamide. Seventy-one percent of CLL patients received 6 cycles and 90% received at least 3 cycles of rituximab-based therapy. Abridged from the full prescribing information.

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Source: US FDA prescribing information, via openFDA. Provided for general information only — it is not a substitute for your doctor's or pharmacist's advice. Always follow your prescriber's instructions.