Margenza (margetuximab-cmkb)

No dosing information is available for this tab.

Administer margetuximab-cmkb by IV infusion after dilution. Administer the drug through a sterile, non-pyrogenic, low-protein binding polyethersulfone (PES) 0.2 micron filter. Do not administer other drugs through the same line.

Store unopened vials of margetuximab-cmkb at 2-8degreesC in the original packaging and protect from light; do not freeze.

Margetuximab-cmkb must be diluted prior to administration. If not used immediately, store the diluted product at room temperature for up to 4 hours or refrigerated at 2-8degreesC up to 24 hours. Allow diluted refrigerated solutions to come to room temperature prior to administration. Do not freeze.

No dosing information is available for this tab.

There is no enhanced messaging for this drug.

There are no contraindication interactions for this drug.

Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

Igg Antibodies And Derivatives/Efgartigimod-Alfa

SEVERITY LEVEL: 2-Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

MECHANISM OF ACTION: The neonatal Fc receptor (FcRn) prevents catabolism and mediates recycling of IgG and albumin, which leads to their long persistence in the body.(1,2) Efgartigimod-alfa binds to FcRn and may decrease systemic exposure of other ligands of FcRn, like immunoglobulins and IgG-based antibodies.(3)

CLINICAL EFFECTS: The effectiveness of medicines that bind to FcRn may be decreased.(3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The manufacturer of efgartigimod-alfa states that efgartigimod-alfa should not be combined with long-term use of FcRn-binding medications. If the medication is essential for the patient, efgartigimod-alfa should be discontinued.(3)

DISCUSSION: Clinical drug interaction studies with efgartigimod-alfa have not been performed. Efgartigimod-alfa may decrease concentrations of compounds that bind to the human FcRn.(3)

Igg Antibodies And Derivatives/Nipocalimab-Aahu

SEVERITY LEVEL: 2-Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

MECHANISM OF ACTION: The neonatal Fc receptor (FcRn) prevents catabolism and mediates recycling of IgG and albumin, which leads to their long persistence in the body.(1,2) Nipocalimab-aahu binds to FcRn and may decrease systemic exposure of other ligands of FcRn, like immunoglobulins and IgG-based antibodies.(3)

CLINICAL EFFECTS: The effectiveness of medicines that bind to FcRn may be decreased.(3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The manufacturer of nipocalimab-aahu states that nipocalimab-aahu should not be combined with long-term use of FcRn-binding medications. If the medication is essential for the patient, nipocalimab-aahu should be discontinued.(3)

DISCUSSION: Clinical drug interaction studies with nipocalimab-aahu have not been performed. Nipocalimab-aahu may decrease concentrations of compounds that bind to the human FcRn.(3)

Slt Immunosuppress; Immunomodulator/Ropeginterferon Alfa-2B

SEVERITY LEVEL: 2-Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

MECHANISM OF ACTION: Ropeginterferon alfa-2b and immunosuppressives both suppress the immune system.

CLINICAL EFFECTS: Concurrent use of ropeginterferon alfa-2b with immunosuppressives may result in an increased risk of serious infections.

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: Avoid concurrent use of myelosuppressive agents.(1-2) If concurrent use cannot be avoided, monitor for effects of excessive immunosuppression.

DISCUSSION: In clinical trials, 20% of patients experienced leukopenia. Interferon alfa products may cause fatal or life-threatening infections.(1-2)

Moderate Interaction: Assess the risk to the patient and take action as needed.

Igg Antibodies And Derivatives/Rozanolixizumab-Noli

SEVERITY LEVEL: 3-Moderate Interaction: Assess the risk to the patient and take action as needed.

MECHANISM OF ACTION: The neonatal Fc receptor (FcRn) prevents catabolism and mediates recycling of IgG and albumin, which leads to their long persistence in the body.(1,2) Rozanolixizumab-noli binds to FcRn and may decrease systemic exposure of other ligands of FcRn, like immunoglobulins and IgG-based antibodies.(3)

CLINICAL EFFECTS: The effectiveness of medications that bind to FcRn may be decreased.(3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The manufacturer of rozanolixizumab-noli states that concurrent use with medications that bind to the human neonatal Fc receptor (FcRn) should be closely monitored for reduced effectiveness of these medications. If long-term use of such medications is essential for the patient, consider discontinuing rozanolixizumab-noli and use alternative therapies.(3)

DISCUSSION: Clinical drug interaction studies with rozanolixizumab-noli have not been performed. Rozanolixizumab-noli may decrease concentrations of compounds that bind to the human FcRn.(3)

Immunosuppressives; Immunomodulators/Covid-19 Vaccines

SEVERITY LEVEL: 3-Moderate Interaction: Assess the risk to the patient and take action as needed.

MECHANISM OF ACTION: Immunosuppressants and immunomodulators may prevent the immune system from properly responding to the COVID-19 vaccine.(1-3)

CLINICAL EFFECTS: Administration of a COVID-19 vaccine with immunosuppressants or immunomodulators may interfere with vaccine-induced immune response and impair the efficacy of the vaccine. However, patients should be offered and given a COVID-19 vaccine even if the use and timing of immunosuppressive agents cannot be adjusted.(1-3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The Centers for Disease Control and Prevention (CDC),(1) Infectious Diseases Society of America (IDSA),(2) and the American College of Rheumatology (ACR)(3) have published guidances for COVID-19 vaccination in patients on immunosuppressants. The CDC states that all immunocompromised patients over 6 months of age should receive at least 1 dose of COVID-19 vaccine if eligible. See the CDC's Interim Clinical Considerations for Use of COVID-19 Vaccines for specific recommendations based on age, vaccination history, and vaccine manufacturer.(1) The CDC advises planning for vaccination at least 2 weeks before starting or resuming immunosuppressive therapy.(1) IDSA recommends timing COVID-19 vaccination at least 2 weeks before starting or at least 3 months after completing immunosuppressive therapy.(2) The ACR states that in general, immunosuppressants and immunomodulators should be held for 1-2 weeks after each vaccine dose.(3) Patients should be offered and given a COVID-19 vaccine even if the use and timing of immunosuppressive agents cannot be adjusted, though the immune response will likely be blunted. COVID-19 vaccines should not be delayed in patients taking immunosuppressive therapies.(1-2) See below for specific recommendations for certain agents. B-cell depleting agents, including rituximab: The CDC states that the utility of B-cell quantification to guide clinical care is not known and is not recommended. Patients who receive B-cell depleting therapy on a continuing basis should receive COVID-19 vaccines about 4 weeks before the next scheduled dose. For patients who received 1 or more doses of COVID-19 vaccine during treatment with B-cell-depleting therapies that were administered over a limited period (e.g., as part of a treatment regimen for certain malignancies), revaccination may be considered according to the current CDC recommendations for unvaccinated patients. The suggested interval to start revaccination is about 6 months after completion of the B-cell-depleting therapy.(1) IDSA recommends waiting for at least 3-6 months after the last infusion of B-cell depleting therapy before administering COVID-19 vaccines.(2) The ACR recommends consulting with the rheumatologist to determine optimal timing of COVID-19 vaccination. Measuring CD19 B cells may be considered to determine need for a booster vaccine dose. If B cell levels are not measured, a supplemental vaccine dose 2-4 weeks before the next scheduled dose of rituximab is recommended.(3) Recipients of hematopoietic cell transplant or CAR-T-cell therapy who received one or more doses of COVID-19 vaccine prior to or during treatment should undergo revaccination following the current CDC recommendations for unvaccinated patients. Revaccination should start at least 3 months (12 weeks) after transplant or CAR-T-cell therapy.(1,2) The CDC includes abatacept, cyclophosphamide, and TNF-alpha and cytokine inhibitors in their general recommendation to hold therapy for at least 2 weeks following vaccination (1) while the ACR provides different recommendations:(3) *Abatacept: - Subcutaneous abatacept should be withheld for 1-2 weeks after each vaccine dose, as disease activity allows. - For intravenous abatacept, time administration so that vaccination will occur 1 week before the next abatacept infusion. *Cyclophosphamide: When feasible, administer cyclophosphamide 1 week after each COVID-19 vaccine dose. *TNF-alpha inhibitors and cytokine inhibitors: The ACR was not able to reach consensus on whether to modify dosing or timing of these agents with COVID-19 vaccination.

DISCUSSION: IDSA recommendations are based on cohort and case control studies in immunocompromised patients that found low to modest vaccine effectiveness (37-61%) but lower risks of COVID-19 association hospitalization, COVID-19 related mortality, and critical illness.(2) The ACR convened a COVID-19 Vaccine Guidance Task Force to provide guidance on optimal use of COVID-19 vaccines in rheumatology patients. These recommendations are based on limited clinical evidence of COVID-19 vaccines in patients without rheumatic and musculoskeletal disorders and evidence of other vaccines in this patient population.(3) The ACR recommendation for rituximab is based on studies of humoral immunity following receipt of other vaccines. These studies have uncertain generalizability to vaccination against COVID-19, as it is unknown if efficacy is attributable to induction of host T cells versus B cell (antibody-based) immunity.(3) The ACR recommendation for mycophenolate is based on preexisting data of mycophenolate on non-COVID-19 vaccine immunogenicity. Emerging data suggests that mycophenolate may impair SARS-CoV-2 vaccine response in rheumatic and musculoskeletal disease and transplant patients.(3) The ACR recommendation for methotrexate is based on data from influenza vaccines and pneumococcal vaccines with methotrexate.(3) The ACR recommendation for JAK inhibitors is based on concerns related to the effects of JAK inhibitors on interferon signaling that may result in a diminished vaccine response.(3) The ACR recommendation for subcutaneous abatacept is based on several studies suggesting a negative effect of abatacept on vaccine immunogenicity. The first vaccine dose primes naive T cells, naive T cell priming is inhibited by CTLA-4, and abatacept is a CTLA-4Ig construct. CTLA-4 should not inhibit boosts of already primed T cells at the time of the second vaccine dose.(3)

*None.

There are no contraindication contraindications for this drug.

• Pregnancy

There are no moderate contraindications for this drug.

Adverse effects reported in >10% of patients receiving margetuximab-cmkb in combination with chemotherapy include fatigue/asthenia, nausea, diarrhea, vomiting, constipation, headache, pyrexia, alopecia, abdominal pain, peripheral neuropathy, arthralgia/myalgia, cough, decreased appetite, dyspnea, infusion-related reactions, palmar-plantar erythrodysesthesia, and extremity pain.

Less Frequent

• Anemia
• Hypotension
• Left ventricular failure
• Leukopenia
• Lymphopenia
• Neutropenic disorder

More Frequent

• Acute abdominal pain
• Alopecia
• Anorexia
• Arthralgia
• Constipation
• Cough
• Diarrhea
• Dyspnea
• Fatigue
• Fever
• General weakness
• Myalgia
• Nausea
• Pain in extremities
• Vomiting

Less Frequent

• Chills
• Dysgeusia
• Hyperhidrosis
• Insomnia
• Pruritus of skin
• Skin rash
• Syncope
• Tachycardia
• Urticaria
• Weight loss

No enhanced messaging available.

Safety and efficacy of margetuximab-cmkb in pediatric patients have not been established.

Margetuximab may cause fetal harm if administered to pregnant women based on its mechanism of action and animal findings.

Advise patients of potential risks to a fetus. There are clinical considerations if margetuximab is used during pregnancy or within 4 months prior to conception. Monitor women who received margetuximab during pregnancy or within 4 months prior to conception for oligohydramnios. If oligohydramnios occurs, perform fetal testing that is appropriate for gestational age and consistent with community standards of care.

It is not known whether margetuximab is distributed into human milk or whether the drug has any effects on the nursing infant or on milk production. The benefits of breast-feeding should be considered along with the importance of margetuximab to the woman and any potential adverse effects on the breast-fed infant from the drug or underlying maternal condition. This consideration should also take into account the margetuximab-cmkb washout period of 4 months.

Human IgG is distributed into human milk but does not enter neonatal or infant circulation in substantial amounts.

The manufacturer makes no specific dosage recommendations for geriatric patients.

Of the 266 patients treated with margetuximab-cmkb in the SOPHIA study, 20% were >=65 years of age and 4% were >=75 years of age. No overall differences in efficacy were observed between patients >=65 years of age compared to younger patients. There was a higher incidence of grade 3 and higher adverse reactions observed in patients >=65 years of age (56%) compared to younger patients (47%), as well as adverse reactions associated with potential cardiotoxicity (35% vs 18%).