Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
ELAHERE vs CLADRIBINE
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
ELAHERE (mirvetuximab soravtansine) is an antibody-drug conjugate (ADC) targeting folate receptor alpha (FRα). It consists of a humanized anti-FRα antibody conjugated to the maytansinoid DM4, a microtubule inhibitor. Upon binding to FRα on tumor cells, the ADC is internalized and releases DM4, which binds to tubulin and disrupts microtubule polymerization, leading to cell cycle arrest and apoptosis.
Cladribine is a purine nucleoside analog that is phosphorylated intracellularly to its active triphosphate form, which inhibits DNA synthesis and repair, leading to cell death, particularly in lymphocytes. It also depletes adenosine deaminase (ADA) and accumulates in cells with high deoxycytidine kinase activity.
Treatment of adult patients with FRα-positive, platinum-resistant epithelial ovarian, fallopian tube, or primary peritoneal cancer who have received one to three prior systemic treatment regimens (FDA approved indication)
FDA-approved: Treatment of hairy cell leukemia.,Off-label: Chronic lymphocytic leukemia (CLL), multiple sclerosis (relapsing forms), Waldenström macroglobulinemia, cutaneous T-cell lymphoma, and as part of conditioning regimens for hematopoietic stem cell transplantation.
6 mg/kg adjusted ideal body weight intravenously every 3 weeks until disease progression or unacceptable toxicity.
0.09 mg/kg/day IV over 2 hours for 7 consecutive days; or 0.14 mg/kg/day IV over 2 hours for 5 consecutive days (total dose 0.7 mg/kg per course).
Terminal half-life approximately 6.2 days (range 3.7-9.5 days) after IV administration; supports every-3-week dosing interval.
Terminal elimination half-life is approximately 5.4 hours (range 4.6–6.7 hours) after intravenous administration; prolonged in renal impairment.
The DM4 component is primarily metabolized by CYP3A4 and, to a lesser extent, by CYP3A5 and CYP2D6. The antibody component undergoes catabolism via proteolytic degradation.
Cladribine is primarily metabolized intracellularly by deoxycytidine kinase to its active triphosphate. It is also phosphorylated by deoxyguanosine kinase in mitochondria. Catabolism involves deamination by adenosine deaminase (ADA) to 2-chloroadenine, which is further metabolized.
Fecal (approximately 80%) as unchanged drug; renal (approximately 8%) as unchanged drug and metabolites.
Renal (approximately 50% as unchanged drug); fecal elimination is minimal (<5%).
Approximately 95% bound to plasma proteins (albumin and alpha-1-acid glycoprotein).
Approximately 20–30% bound to plasma proteins.
Mean Vd approximately 0.27 L/kg (range 0.14-0.54 L/kg), indicating distribution primarily in plasma and extracellular fluid.
Approximately 4.5 L/kg (range 2.3–9.6 L/kg), indicating extensive tissue distribution.
Intravenous only; oral bioavailability not applicable (0% by oral route).
Oral: approximately 37–55% (first-pass metabolism); subcutaneous: approximately 100%.
No dose adjustment required for mild to moderate renal impairment (Cr Cl ≥30 m L/min). Not studied in severe renal impairment (Cr Cl <30 m L/min).
GFR <50 m L/min: reduce dose by 50%; GFR <10 m L/min: avoid use.
No dose adjustment required for mild hepatic impairment (Child-Pugh A). Not studied in moderate to severe hepatic impairment (Child-Pugh B or C).
Child-Pugh Class B: reduce dose by 50%; Child-Pugh Class C: contraindicated.
Safety and efficacy not established in pediatric patients.
0.09 mg/kg/day IV over 2 hours for 7 consecutive days; or 0.14 mg/kg/day IV over 2 hours for 5 consecutive days (total dose 0.7 mg/kg per course). No specific pediatric dose adjustments beyond weight-based dosing.
No specific dose adjustment recommended. Elderly patients (≥65 years) experienced higher rates of serious adverse reactions; monitor closely.
No specific dose adjustment recommended; monitor renal function and adjust accordingly.
ELAHERE is not approved for use in patients with platinum-sensitive disease due to increased toxicity and mortality observed in a clinical trial. No other black box warnings.
WARNING: Neurotoxicity and Hematologic Toxicity. Cladribine can cause severe bone marrow suppression (neutropenia, anemia, thrombocytopenia) and neurotoxicity (including paralysis, coma, and death). Dose-dependent and more frequent in high doses.
Ocular toxicity: Corneal toxicity, including keratopathy, blurred vision, dry eyes, and photophobia. Requires ophthalmic monitoring and management with prophylactic corticosteroid eye drops.,Pneumonitis/Interstitial lung disease (ILD): Monitor for cough, dyspnea, or hypoxia; withhold or discontinue if severe.,Peripheral neuropathy: Monitor for sensory or motor neuropathy; dose modify as needed.,Embryo-fetal toxicity: Can cause fetal harm; advise patients of reproductive potential to use effective contraception.
Myelosuppression: Monitor blood counts regularly; dose adjustment or discontinuation may be needed.,Neurotoxicity: Risk increased with high doses and in patients with renal impairment.,Nephrotoxicity: Use with caution in renal impairment; reduce dose if Cr Cl < 60 m L/min.,Hepatotoxicity: Monitor liver function tests.,Secondary malignancies: Increased risk of myelodysplasia and acute myeloid leukemia.,Infections: Increased susceptibility due to lymphopenia; consider prophylaxis.
Known severe hypersensitivity to mirvetuximab soravtansine or any of its components,Use in patients with platinum-sensitive disease as safety and efficacy not established and increased risk of serious adverse events
Hypersensitivity to cladribine or any component of the formulation.,Pre-existing severe bone marrow suppression (e.g., neutropenia, thrombocytopenia) unless due to underlying disease.,Pregnancy: Can cause fetal harm.,Lactation: Discontinue nursing or drug.
Avoid grapefruit and grapefruit juice during treatment as they may increase mirvetuximab soravtansine exposure. No other significant food interactions reported.
No significant food interactions. Avoid grapefruit juice due to potential CYP3A4 interaction (though minimal). Maintain adequate hydration to prevent tumor lysis syndrome in hematologic malignancies.
Based on its mechanism of action (folate receptor alpha-directed antibody-drug conjugate containing maytansinoid DM4, a microtubule inhibitor), ELAHERE is expected to cause embryofetal toxicity and teratogenicity. Malformations and developmental abnormalities are likely if administered during the first trimester. Second and third trimester exposure may result in fetal growth restriction, oligohydramnios, and organ dysfunction due to anti-mitotic effects. There are no adequate human data; animal studies have not been conducted.
FDA Pregnancy Category D. First trimester: Avoid due to known teratogenicity in animal studies (skeletal and visceral malformations) and potential for MDS and AML. Second and third trimesters: Risk of fetal myelosuppression, intrauterine growth restriction, and preterm labor. Cladribine crosses the placenta and may cause fetal hematopoietic suppression.
No data on presence in human milk, effects on breastfed infant, or milk production. Due to potential for serious adverse reactions (e.g., myelosuppression, neurotoxicity) in nursing infants, advise not to breastfeed during treatment and for at least 1 week after the last dose. M/P ratio unknown.
Contraindicated during breastfeeding. Cladribine is excreted into human milk; M/P ratio not determined. Potential for severe adverse effects in nursing infants, including myelosuppression and immunosuppression. Discontinue breastfeeding during therapy and for at least 7 days after last dose.
No recommended dose adjustments in pregnancy due to lack of pharmacokinetic data. Pregnancy is a contraindication due to embryofetal toxicity. If treatment is necessary, exposure-adjusted dosing has not been studied; consider alternative therapies.
No established dose adjustments in pregnancy. Use is contraindicated. If unavoidable, lowest effective dose and close monitoring for maternal and fetal toxicity. Pharmacokinetic changes in pregnancy (increased volume of distribution, renal clearance) may reduce exposure; however, risks outweigh benefits.
ELAHERE (mirvetuximab soravtansine) is an antibody-drug conjugate targeting folate receptor alpha (FRα). Administer premedications to reduce infusion reactions. Monitor for ocular toxicity including blurred vision, keratopathy, and dry eye; refer to ophthalmology if symptoms occur. Assess for interstitial lung disease. Use with caution in patients with hepatic impairment due to potential for hepatotoxicity. Contraception required during treatment and for 7 months after last dose.
Cladribine is a purine nucleoside analog that causes lymphocyte depletion, effective in hairy cell leukemia and multiple sclerosis. Monitor for severe lymphopenia, opportunistic infections (e.g., herpes zoster, tuberculosis), and delayed myelosuppression. Do not administer live vaccines during or after treatment. Due to high bioavailability after subcutaneous administration, adjust dose for renal impairment. Hypersensitivity reactions may occur; premedicate with antihistamines if needed.
This drug targets a protein called folate receptor alpha found on some cancer cells.,You will receive this medication as an intravenous (IV) infusion every 3 weeks.,Common side effects include fatigue, nausea, diarrhea, and blurred vision.,Report any vision changes, shortness of breath, or yellowing of the skin/eyes immediately.,Use effective contraception during treatment and for 7 months after the last dose.,Do not breastfeed during treatment and for 1 month after the last dose.,Stay hydrated and eat small, frequent meals to manage nausea and diarrhea.,Avoid grapefruit and grapefruit juice as it may interact with this medication.
Cladribine can significantly lower your white blood cell count, increasing infection risk. Report fever, chills, or sore throat immediately.,Avoid live vaccines (e.g., MMR, shingles) during and for at least 6 months after treatment.,You may experience fatigue, nausea, headache, or skin reactions at injection site. These are common but report severe symptoms.,Use effective contraception during treatment and for at least 6 months after the last dose. Cladribine may harm a fetus.,You will need regular blood tests to monitor your blood cell counts, liver, and kidney function.
No interactions on record
"The combination of cabazitaxel and cladribine may potentiate myelosuppression due to overlapping bone marrow toxicity profiles. Cabazitaxel, a taxane antineoplastic, inhibits microtubule disassembly, while cladribine, a purine analog, incorporates into DNA and induces apoptosis in dividing and resting lymphocytes. Concurrent use increases the risk of severe neutropenia, thrombocytopenia, and anemia, potentially leading to febrile neutropenia or bleeding complications."
"Cladribine, a purine nucleoside analog with potent immunosuppressive properties, may reduce the pharmacodynamic effects of cardiac glycosides such as acetyldigitoxin. This interaction is hypothesized to occur through cladribine-induced modulation of myocardial cellular signaling pathways that decrease sensitivity to digitalis compounds, potentially leading to reduced inotropic efficacy. Clinically, this could manifest as diminished control of heart rate in patients with atrial fibrillation or worsening heart failure symptoms, particularly in those relying on acetyldigitoxin for rate control or inotropic support."
"The risk or severity of adverse effects can be increased when Pimecrolimus is combined with Cladribine."
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about ELAHERE vs CLADRIBINE, answered by our medical review team.
ELAHERE is a Antineoplastic Agent that works by ELAHERE (mirvetuximab soravtansine) is an antibody-drug conjugate (ADC) targeting folate receptor alpha (FRα). It consists of a humanized anti-FRα antibody conjugated to the maytansinoid DM4, a microtubule inhibitor. Upon binding to FRα on tumor cells, the ADC is internalized and releases DM4, which binds to tubulin and disrupts microtubule polymerization, leading to cell cycle arrest and apoptosis.. CLADRIBINE is a Antineoplastic Agent that works by Cladribine is a purine nucleoside analog that is phosphorylated intracellularly to its active triphosphate form, which inhibits DNA synthesis and repair, leading to cell death, particularly in lymphocytes. It also depletes adenosine deaminase (ADA) and accumulates in cells with high deoxycytidine kinase activity.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between ELAHERE and CLADRIBINE depend on the specific clinical indication. These are both Antineoplastic Agent agents and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of ELAHERE is: 6 mg/kg adjusted ideal body weight intravenously every 3 weeks until disease progression or unacceptable toxicity.. The standard adult dose of CLADRIBINE is: 0.09 mg/kg/day IV over 2 hours for 7 consecutive days; or 0.14 mg/kg/day IV over 2 hours for 5 consecutive days (total dose 0.7 mg/kg per course).. Dosing should always be individualized based on indication, renal and hepatic function, age, and other patient factors.
No direct drug-drug interaction has been formally documented between ELAHERE and CLADRIBINE in current clinical databases. However, individual patient risk factors including other medications, organ function, and comorbidities should always be evaluated by a qualified healthcare provider.
The maternal-fetal safety profiles differ. ELAHERE is classified as Category C. Based on its mechanism of action (folate receptor alpha-directed antibody-drug conjugate containing maytansinoid DM4, a microtubule inhibitor), ELAHERE is expected to cause embryof. CLADRIBINE is classified as Category C. FDA Pregnancy Category D. First trimester: Avoid due to known teratogenicity in animal studies (skeletal and visceral malformations) and potential for MDS and AML. Second and third. Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.