Elahere (mirvetuximab soravtansine-gynx) vs Orserdu (elacestrant)

Elahere (mirvetuximab soravtansine-gynx) vs Orserdu (elacestrant)

Elahere (mirvetuximab soravtansine-gynx) is an antibody-drug conjugate specifically targeting folate receptor alpha (FRα)-positive, platinum-resistant ovarian cancer, offering a targeted approach for patients with this biomarker. On the other hand, Orserdu (elacestrant) is a selective estrogen receptor degrader (SERD) used for the treatment of estrogen receptor (ER)-positive, HER2-negative advanced or metastatic breast cancer, particularly after menopause. When deciding between these two medications, it is crucial to consider the type of cancer, its receptor status, and previous treatments, as Elahere is tailored for a specific ovarian cancer subtype, while Orserdu is indicated for certain breast cancers.

Difference between Elahere and Orserdu

Metric Elahere (mirvetuximab soravtansine-gynx) Orserdu (elacestrant)
Generic name Mirvetuximab soravtansine-gynx Elacestrant
Indications Ovarian cancer ER+/HER2- advanced or metastatic breast cancer
Mechanism of action Antibody-drug conjugate targeting folate receptor alpha Oral selective estrogen receptor degrader (SERD)
Brand names Elahere Orserdu
Administrative route Intravenous Oral
Side effects Diarrhea, blurred vision, nausea, fatigue, abdominal pain Nausea, vomiting, fatigue, decreased appetite, constipation
Contraindications Hypersensitivity to the active substance or any of the excipients Hypersensitivity to the active substance or any of the excipients
Drug class Antibody-drug conjugate Selective estrogen receptor degrader
Manufacturer ImmunoGen, Inc. Radiopharm Theranostics

Efficacy

Efficacy of Elahere (mirvetuximab soravtansine-gynx)

Elahere, known generically as mirvetuximab soravtansine-gynx, is a targeted therapy designed for the treatment of certain types of gynecological cancers, specifically ovarian cancer. It is an antibody-drug conjugate that combines a folate receptor alpha (FRα)-binding antibody with a potent cytotoxic agent. The efficacy of Elahere has been evaluated in clinical trials involving patients with FRα-positive, platinum-resistant ovarian cancer, a particularly challenging condition to treat due to its resistance to standard chemotherapy.

In these studies, Elahere has demonstrated a significant ability to target and kill cancer cells while sparing healthy cells, leading to a reduction in tumor size and, in some cases, prolonged progression-free survival in patients. It is particularly effective in patients whose tumors exhibit a high expression of FRα and who have received fewer prior lines of therapy. The response rates in this subset of patients have been encouraging, offering a new avenue of hope for those with limited treatment options.

Efficacy of Orserdu (elacestrant)

Orserdu, with the generic name elacestrant, is a selective estrogen receptor degrader (SERD) that has been investigated for the treatment of estrogen receptor-positive (ER+), human epidermal growth factor receptor 2-negative (HER2-) advanced or metastatic breast cancer. While not a traditional gynecological cancer medication, its efficacy in breast cancer suggests potential utility in other ER+ gynecological cancers, such as endometrial cancer, though its use in these cancers would be considered off-label.

Clinical trials have shown that Orserdu is effective in inhibiting the growth of ER+ breast cancer cells, including those that are resistant to other forms of endocrine therapy. In a phase 2 trial, Orserdu demonstrated a statistically significant improvement in progression-free survival compared to standard endocrine therapies in patients with ER+ advanced breast cancer. This indicates a promising role for Orserdu in managing ER+ gynecological cancers, pending further research to confirm its efficacy and safety in these specific types of cancer.

Regulatory Agency Approvals

Elahere
  • Food and Drug Administration (FDA), USA
Orserdu
  • Food and Drug Administration (FDA), USA

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If Elahere or Orserdu are not approved or available in your country (e.g. due to supply issues), you can access them via Everyone.org.

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