Enhertu

— THERAPEUTIC CATEGORIES —
  • Breast cancer
  • Colorectal and other GI cancers
  • Respiratory and thoracic cancers

Enhertu Generic Name & Formulations

General Description

Fam-trastuzumab deruxtecan-nxki 100mg; per vial; lyophilized pwd for IV infusion after reconstitution and dilution; preservative-free.

Pharmacological Class

HER2-directed antibody + topoisomerase inhibitor conjugate.

How Supplied

Single-dose vial—1

Manufacturer

Generic Availability

NO

Mechanism of Action

Fam-trastuzumab deruxtecan-nxki is a HER2-directed antibody-drug conjugate. The antibody is a humanized anti-HER2 IgG1. The small molecule, DXd, is a topoisomerase I inhibitor attached to the antibody by a cleavable linker. Following binding to HER2 on tumor cells, fam-trastuzumab deruxtecan-nxki undergoes internalization and intracellular linker cleavage by lysosomal enzymes. Upon release, the membrane-permeable DXd causes DNA damage and apoptotic cell death.

Enhertu Indications

Indications

In adults with unresectable or metastatic HER2-positive breast cancer who have received a prior anti-HER2-based regimen either: in the metastatic setting, or in the neoadjuvant or adjuvant setting and have developed disease recurrence during or within 6 months of completing therapy. In adults with unresectable or metastatic HER2-low (IHC 1+ or IHC 2+/ISH-) breast cancer who have received prior chemotherapy in the metastatic setting or developed disease recurrence during or within 6 months of completing adjuvant chemotherapy.

Enhertu Dosage and Administration

Adult

Select patients accordingly. Give as IV infusion over 90mins; may give subsequent infusions over 30mins if prior infusions tolerated. 5.4mg/kg once every 3 weeks (21-day cycle) until disease progression or unacceptable toxicity. Premedicate with prophylactic antiemetics according to institutional guidelines. Dose modifications: see full labeling.

Children

Not established.

Enhertu Contraindications

Not Applicable

Enhertu Boxed Warnings

Boxed Warning

Interstitial lung disease. Embryo-fetal toxicity.

Enhertu Warnings/Precautions

Warnings/Precautions

Not substitutable for or with trastuzumab or ado-trastuzumab emtansine. Monitor for new or worsening respiratory symptoms; permanently discontinue if symptomatic (grade ≥2) interstitial lung disease (ILD)/pneumonitis develops. Monitor CBCs prior to initiation and each dose, then as clinically indicated; interrupt or reduce dose based on severity of neutropenia. Risk of left ventricular dysfunction. Assess LVEF prior to initiation and at regular intervals during treatment as clinically indicated; permanently discontinue if LVEF <40% or absolute decrease from baseline >20% is confirmed. Permanently discontinue in patients with symptomatic CHF or if severe infusion reactions occur. History of clinically significant cardiac disease or LVEF <50% prior to initiation of treatment: not studied. Moderate renal (CrCl ≥30–<60mL/min) or moderate hepatic (total bilirubin >1.5–3×ULN and any AST) impairment: monitor closely. Severe renal (CrCL <30mL/min) or severe hepatic (total bilirubin >3×ULN and any AST) impairment: dosage has not been established. Embryo-fetal toxicity (oligohydramnios, others). Advise to use effective contraception during and for ≥7 months (females) or ≥4 months (males w. female partners) after the last dose. Pregnancy: exclude status prior to initiation. Nursing mothers: not recommended (during and for 7 months after the last dose).

Enhertu Pharmacokinetics

Distribution

Volume of distribution: 2.68 L. 

Metabolism

Catabolic pathways.

Elimination

Half-life: ~5.4–5.7 days. Systemic clearance: 0.41 L/day.

Enhertu Interactions

Not Applicable

Enhertu Adverse Reactions

Adverse Reactions

Nausea, decreased blood counts (WBC, hemoglobin, neutrophil, platelet, lymphocyte), increased AST/ALT, increased blood alkaline phosphatase, increased blood bilirubin, fatigue, vomiting, alopecia, constipation, decreased appetite, anemia, diarrhea, hypokalemia, cough, pyrexia, musculoskeletal pain, respiratory infection, headache, abdominal pain.

Enhertu Clinical Trials

See Literature

Enhertu Note

Not Applicable

Enhertu Patient Counseling

See Literature

Enhertu Generic Name & Formulations

General Description

Fam-trastuzumab deruxtecan-nxki 100mg; per vial; lyophilized pwd for IV infusion after reconstitution and dilution; preservative-free.

Pharmacological Class

HER2-directed antibody + topoisomerase inhibitor conjugate.

How Supplied

Single-dose vial—1

Manufacturer

Generic Availability

NO

Mechanism of Action

Fam-trastuzumab deruxtecan-nxki is a HER2-directed antibody-drug conjugate. The antibody is a humanized anti-HER2 IgG1. The small molecule, DXd, is a topoisomerase I inhibitor attached to the antibody by a cleavable linker. Following binding to HER2 on tumor cells, fam-trastuzumab deruxtecan-nxki undergoes internalization and intracellular linker cleavage by lysosomal enzymes. Upon release, the membrane-permeable DXd causes DNA damage and apoptotic cell death.

Enhertu Indications

Indications

In adults with locally advanced or metastatic HER2-positive gastric or gastroesophageal junction (GEJ) adenocarcinoma who have received a prior trastuzumab-based regimen.

Enhertu Dosage and Administration

Adult

Select patients accordingly. Give as IV infusion over 90mins; may give subsequent infusions over 30mins if prior infusions tolerated. 6.4mg/kg once every 3 weeks (21-day cycle) until disease progression or unacceptable toxicity. Premedicate with prophylactic antiemetics according to institutional guidelines. Dose modifications: see full labeling.

Children

Not established.

Enhertu Contraindications

Not Applicable

Enhertu Boxed Warnings

Boxed Warning

Interstitial lung disease. Embryo-fetal toxicity.

Enhertu Warnings/Precautions

Warnings/Precautions

Not substitutable for or with trastuzumab or ado-trastuzumab emtansine. Monitor for new or worsening respiratory symptoms; permanently discontinue if symptomatic (grade ≥2) interstitial lung disease (ILD)/pneumonitis develops. Monitor CBCs prior to initiation and each dose, then as clinically indicated; interrupt or reduce dose based on severity of neutropenia. Risk of left ventricular dysfunction. Assess LVEF prior to initiation and at regular intervals during treatment as clinically indicated; permanently discontinue if LVEF <40% or absolute decrease from baseline >20% is confirmed. Permanently discontinue in patients with symptomatic CHF or if severe infusion reactions occur. History of clinically significant cardiac disease or LVEF <50% prior to initiation of treatment: not studied. Moderate renal (CrCl ≥30–<60mL/min) or moderate hepatic (total bilirubin >1.5–3×ULN and any AST) impairment: monitor closely. Severe renal (CrCL <30mL/min) or severe hepatic (total bilirubin >3×ULN and any AST) impairment: dosage has not been established. Embryo-fetal toxicity (oligohydramnios, others). Advise to use effective contraception during and for ≥7 months (females) or ≥4 months (males w. female partners) after the last dose. Pregnancy: exclude status prior to initiation. Nursing mothers: not recommended (during and for 7 months after the last dose).

Enhertu Pharmacokinetics

Distribution

Volume of distribution: 2.68 L. 

Metabolism

Catabolic pathways.

Elimination

Half-life: ~5.4–5.7 days. Systemic clearance: 0.41 L/day.

Enhertu Interactions

Not Applicable

Enhertu Adverse Reactions

Adverse Reactions

Nausea, decreased blood counts (WBC, hemoglobin, neutrophil, platelet, lymphocyte), increased AST/ALT, increased blood alkaline phosphatase, increased blood bilirubin, fatigue, vomiting, alopecia, constipation, decreased appetite, anemia, diarrhea, hypokalemia, cough, pyrexia, musculoskeletal pain, respiratory infection, headache, abdominal pain.

Enhertu Clinical Trials

See Literature

Enhertu Note

Not Applicable

Enhertu Patient Counseling

See Literature

Enhertu Generic Name & Formulations

General Description

Fam-trastuzumab deruxtecan-nxki 100mg; per vial; lyophilized pwd for IV infusion after reconstitution and dilution; preservative-free.

Pharmacological Class

HER2-directed antibody + topoisomerase inhibitor conjugate.

How Supplied

Single-dose vial—1

Manufacturer

Generic Availability

NO

Mechanism of Action

Fam-trastuzumab deruxtecan-nxki is a HER2-directed antibody-drug conjugate. The antibody is a humanized anti-HER2 IgG1. The small molecule, DXd, is a topoisomerase I inhibitor attached to the antibody by a cleavable linker. Following binding to HER2 on tumor cells, fam-trastuzumab deruxtecan-nxki undergoes internalization and intracellular linker cleavage by lysosomal enzymes. Upon release, the membrane-permeable DXd causes DNA damage and apoptotic cell death.

Enhertu Indications

Indications

In adults with unresectable or metastatic non-small cell lung cancer (NSCLC) whose tumors have activating HER2 (ERBB2) mutations, as detected by an FDA-approved test, and who have received a prior systemic therapy.

Enhertu Dosage and Administration

Adult

Select patients accordingly. Give as IV infusion over 90mins; may give subsequent infusions over 30mins if prior infusions tolerated. 5.4mg/kg once every 3 weeks (21-day cycle) until disease progression or unacceptable toxicity. Premedicate with prophylactic antiemetics according to institutional guidelines. Dose modifications: see full labeling.

Children

Not established.

Enhertu Contraindications

Not Applicable

Enhertu Boxed Warnings

Boxed Warning

Interstitial lung disease. Embryo-fetal toxicity.

Enhertu Warnings/Precautions

Warnings/Precautions

Not substitutable for or with trastuzumab or ado-trastuzumab emtansine. Monitor for new or worsening respiratory symptoms; permanently discontinue if symptomatic (grade ≥2) interstitial lung disease (ILD)/pneumonitis develops. Monitor CBCs prior to initiation and each dose, then as clinically indicated; interrupt or reduce dose based on severity of neutropenia. Risk of left ventricular dysfunction. Assess LVEF prior to initiation and at regular intervals during treatment as clinically indicated; permanently discontinue if LVEF <40% or absolute decrease from baseline >20% is confirmed. Permanently discontinue in patients with symptomatic CHF or if severe infusion reactions occur. History of clinically significant cardiac disease or LVEF <50% prior to initiation of treatment: not studied. Moderate renal (CrCl ≥30–<60mL/min) or moderate hepatic (total bilirubin >1.5–3×ULN and any AST) impairment: monitor closely. Severe renal (CrCL <30mL/min) or severe hepatic (total bilirubin >3×ULN and any AST) impairment: dosage has not been established. Embryo-fetal toxicity (oligohydramnios, others). Advise to use effective contraception during and for ≥7 months (females) or ≥4 months (males w. female partners) after the last dose. Pregnancy: exclude status prior to initiation. Nursing mothers: not recommended (during and for 7 months after the last dose).

Enhertu Pharmacokinetics

Distribution

Volume of distribution: 2.68 L. 

Metabolism

Catabolic pathways.

Elimination

Half-life: ~5.4–5.7 days. Systemic clearance: 0.41 L/day.

Enhertu Interactions

Not Applicable

Enhertu Adverse Reactions

Adverse Reactions

Nausea, decreased blood counts (WBC, hemoglobin, neutrophil, platelet, lymphocyte), increased AST/ALT, increased blood alkaline phosphatase, increased blood bilirubin, fatigue, vomiting, alopecia, constipation, decreased appetite, anemia, diarrhea, hypokalemia, cough, pyrexia, musculoskeletal pain, respiratory infection, headache, abdominal pain.

Enhertu Clinical Trials

See Literature

Enhertu Note

Not Applicable

Enhertu Patient Counseling

See Literature