| Breast Carcinoma
Enhertu vs Zoladex
Side-by-side clinical, coverage, and cost comparison for breast carcinoma.Deep comparison between: Enhertu vs Zoladex with Prescriber.AI
AI compares prescribing info and payer-specific access barriers across 1,200+ formularies. Here's a preview of what prescribers are already asking.Safety signalsZoladex has a higher rate of injection site reactions vs Enhertu based on FDA-approved prescribing information
Coverage gaps3 major payers require step therapy for Zoladex but not Enhertu, including UnitedHealthcare
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Category
Enhertu
Zoladex
At A Glance
IV infusion
Every 3 weeks
HER2-directed antibody-drug conjugate with topoisomerase I inhibitor
SC injection
Every 28 days
GnRH agonist
Indications
- Breast Carcinoma
- Non-Small Cell Lung Carcinoma
- Gastric Adenocarcinoma
- Prostate carcinoma
- Endometriosis
- Abnormal uterine bleeding
- Breast Carcinoma
Dosing
Breast Carcinoma (HER2-positive, HER2-low, or HER2-ultralow) 5.4 mg/kg IV infusion every 3 weeks until disease progression or unacceptable toxicity
Breast Carcinoma (HER2-positive, first-line with pertuzumab) Cycle 1 Day 1: 5.4 mg/kg IV followed by pertuzumab 840 mg; subsequent cycles: 5.4 mg/kg IV followed by pertuzumab 420 mg every 3 weeks
Non-Small Cell Lung Carcinoma (HER2-mutant) 5.4 mg/kg IV infusion every 3 weeks until disease progression or unacceptable toxicity
Gastric Adenocarcinoma (HER2-positive) 6.4 mg/kg IV infusion every 3 weeks until disease progression or unacceptable toxicity
Prostate carcinoma (Stage B2-C) 3.6 mg SC every 28 days starting 8 weeks before radiotherapy, in combination with flutamide, continued during radiation therapy; alternatively, a 10.8 mg depot may follow the initial 3.6 mg depot.
Prostate carcinoma (advanced) 3.6 mg SC every 28 days; intended for long-term administration.
Endometriosis 3.6 mg SC every 28 days for 6 months.
Abnormal uterine bleeding One or two 3.6 mg SC depots given 4 weeks apart; surgery performed at 4 weeks after one depot, or within 2-4 weeks after the second depot.
Breast Carcinoma 3.6 mg SC every 28 days; intended for long-term administration.
Contraindications
—
- Known hypersensitivity to GnRH, GnRH agonist analogues, or any component of ZOLADEX
- Pregnancy (except when used for palliative treatment of advanced breast cancer)
Adverse Reactions
Most common (>=20%) Decreased white blood cell count, nausea, decreased hemoglobin, decreased neutrophil count, decreased lymphocyte count, fatigue, decreased platelet count, increased aspartate aminotransferase, increased alanine aminotransferase, increased blood alkaline phosphatase, vomiting, alopecia, decreased blood potassium, constipation, musculoskeletal pain, diarrhea, decreased appetite
Serious Interstitial lung disease, pneumonitis, pneumonia, febrile neutropenia, vomiting, nausea, hypokalemia, pulmonary embolism, sepsis
Most common (>10%) in men Hot flashes, sexual dysfunction, decreased erections, lower urinary tract symptoms
Most common (>20%) in women Hot flushes, headache, sweating, acne, emotional lability, depression, decreased libido, vaginitis, breast atrophy, seborrhea, peripheral edema
Serious Tumor flare, ureteral obstruction, spinal cord compression, pituitary apoplexy
Postmarketing Osteoporosis, bone fracture, deep vein thrombosis, pulmonary embolism, myocardial infarction, stroke, transient ischemic attack, ovarian cyst, pituitary adenoma, SJS/TEN, DRESS, AGEP, erythema multiforme, psychotic disorders, suicidal ideation, convulsions
Pharmacology
Fam-trastuzumab deruxtecan-nxki is a HER2-directed antibody-drug conjugate consisting of a humanized anti-HER2 IgG1 antibody linked to a topoisomerase I inhibitor (DXd). After binding to HER2 on tumor cells, the drug undergoes internalization and lysosomal cleavage, releasing the membrane-permeable DXd that causes DNA damage and apoptotic cell death.
ZOLADEX is a synthetic decapeptide analogue of GnRH that inhibits pituitary gonadotropin secretion; chronic administration suppresses serum testosterone in males to castrate levels and reduces serum estradiol in females to postmenopausal levels, leading to regression of hormone-sensitive tumors and accessory sex organ regression.
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Most Common Insurance
Anthem BCBS
Enhertu
- Covered on 5 commercial plans
- PA (11/12) · Step Therapy (0/12) · Qty limit (0/12)
Zoladex
- Covered on 5 commercial plans
- PA (9/12) · Step Therapy (0/12) · Qty limit (9/12)
UnitedHealthcare
Enhertu
- Covered on 4 commercial plans
- PA (0/8) · Step Therapy (0/8) · Qty limit (0/8)
Zoladex
- Covered on 4 commercial plans
- PA (0/8) · Step Therapy (0/8) · Qty limit (0/8)
Humana
Enhertu
- Covered on 0 commercial plans
- PA (3/3) · Step Therapy (0/3) · Qty limit (0/3)
Zoladex
- Covered on 0 commercial plans
- PA (3/3) · Step Therapy (0/3) · Qty limit (2/3)
Coverage data sourced from MMIT. Updated monthly.
Savings
No savings programs available for Enhertu.
No savings programs available for Zoladex.
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Clinical data sourced from FDA-approved labeling. Coverage data via MMIT. Updated monthly.