Keytruda (pembrolizumab) vs Adcetris (brentuximab vedotin)

Keytruda (pembrolizumab) vs Adcetris (brentuximab vedotin)

Keytruda (pembrolizumab) is an immune checkpoint inhibitor that works by blocking the PD-1 pathway, enhancing the body's immune response against cancer cells, and is commonly used in the treatment of various cancers, including melanoma, lung cancer, and head and neck cancers. Adcetris (brentuximab vedotin) is an antibody-drug conjugate that targets the CD30 protein on cancer cells, releasing a chemotherapy-like agent directly into those cells, and is primarily used in the treatment of Hodgkin lymphoma and systemic anaplastic large cell lymphoma. The choice between Keytruda and Adcetris would depend on the specific type and stage of cancer a patient has, as well as their overall health, prior treatments, and potential side effects, and should be made in consultation with an oncologist.

Difference between Keytruda and Adcetris

Metric Keytruda (pembrolizumab) Adcetris (brentuximab vedotin)
Generic name Pembrolizumab Brentuximab vedotin
Indications Various types of cancers including melanoma, lung cancer, head and neck cancer, Hodgkin lymphoma, and others Hodgkin lymphoma, systemic anaplastic large cell lymphoma, and primary cutaneous anaplastic large cell lymphoma
Mechanism of action Programmed death receptor-1 (PD-1) blocking antibody CD30-directed antibody-drug conjugate
Brand names Keytruda Adcetris
Administrative route Intravenous infusion Intravenous infusion
Side effects Fatigue, musculoskeletal pain, decreased appetite, pruritus, diarrhea, nausea, rash, pyrexia, cough, dyspnea, constipation, pain in extremity, and headache Peripheral neuropathy, fatigue, nausea, anemia, upper respiratory tract infection, diarrhea, fever, rash, thrombocytopenia, cough, and vomiting
Contraindications None known specifically; caution in patients with autoimmune disease or those receiving immunosuppressive therapy Concomitant use of bleomycin due to pulmonary toxicity risk
Drug class Anti-PD-1 monoclonal antibody Antibody-drug conjugate
Manufacturer Merck & Co. Seattle Genetics

Efficacy

Keytruda (Pembrolizumab) for Lymphoma

Keytruda, also known as pembrolizumab, is a highly effective treatment option for certain types of lymphoma. It is a monoclonal antibody that works by targeting the PD-1 pathway, which is a checkpoint that regulates the immune system's ability to attack cancer cells. In lymphoma, particularly in Hodgkin lymphoma and primary mediastinal large B-cell lymphoma, pembrolizumab has shown significant efficacy. Clinical trials have demonstrated that Keytruda can induce responses in a substantial proportion of patients, including those who have relapsed or are refractory to previous therapies. The response rates and duration of response vary depending on the specific type of lymphoma and previous treatments received by the patient.

Adcetris (Brentuximab Vedotin) for Lymphoma

Adcetris, or brentuximab vedotin, is another targeted therapy that has proven to be effective in the treatment of certain lymphomas, notably Hodgkin lymphoma and systemic anaplastic large cell lymphoma (ALCL). Brentuximab vedotin is an antibody-drug conjugate that combines an anti-CD30 antibody with a potent cytotoxic agent. This medication binds to the CD30 protein on the surface of lymphoma cells and delivers the cytotoxic agent directly into those cells. Clinical studies have shown that Adcetris can induce complete remissions in a significant number of patients with relapsed or refractory Hodgkin lymphoma, as well as in systemic ALCL. The drug has been a particularly important advancement for patients who have not responded to other treatments or who have relapsed after stem cell transplantation.

Comparative Efficacy in Lymphoma

When comparing the efficacy of Keytruda and Adcetris for lymphoma, it is important to consider the specific subtype of the disease and the patient's treatment history. Both drugs have been revolutionary in the management of relapsed or refractory Hodgkin lymphoma, providing new hope for patients who have exhausted other treatment options. However, their mechanisms of action, side effect profiles, and indications may differ, making the choice of therapy dependent on individual patient factors and the discretion of the treating physician. In some cases, these drugs may be used in combination with other therapies to enhance their efficacy.

Conclusion

Overall, Keytruda and Adcetris have significantly advanced the treatment of lymphoma, particularly for patients with challenging cases such as relapsed or refractory disease. Continued research and clinical trials are expanding the knowledge of how best to utilize these medications, potentially in combination with other treatments, to improve outcomes for lymphoma patients. It is crucial for healthcare providers to stay informed about the latest evidence regarding the efficacy of these drugs to optimize treatment regimens for their patients with lymphoma.

Regulatory Agency Approvals

Keytruda
  • European Medical Agency (EMA), European Union
  • Food and Drug Administration (FDA), USA
  • Health Canada
  • Therapeutic Goods Administration (TGA), Australia
  • Medsafe (NZ)
Adcetris
  • European Medical Agency (EMA), European Union
  • Food and Drug Administration (FDA), USA
  • Health Canada
  • Pharmaceuticals and Medical Devices Agency (PMDA), Japan
  • Therapeutic Goods Administration (TGA), Australia
  • NMPA (China)

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If Keytruda or Adcetris 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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