This marks the first approval for lazertinib. Amivantamab was initially approved by the FDA in 2021 and carries a few indications for locally advanced or metastatic NSCLC. Both drugs are manufactured by Janssen Biotech Inc.
“Patients will now have the option of a potential new first-line standard of care with significant clinical benefits over osimertinib,” study investigator Alexander Spira, MD, PhD, director, Virginia Cancer Specialists Research Institute, said in a news release from Johnson & Johnson .
Lazertinib is an oral, highly selective, third-generation EGFR tyrosine kinase inhibitor that can penetrate the brain and amivantamab is a bispecific antibody targeting EGFR and MET.
The approval was based on results from the phase 3 MARIPOSA trial, which showed that the combination reduced the risk of disease progression or death by 30% compared with osimertinib.
The MARIPOSA trial randomly allocated 1074 patients with exon 19 deletion or exon 21 L858R substitution mutation-positive locally advanced or metastatic NSCLC and no prior systemic therapy for advanced disease to amivantamab plus lazertinib, osimertinib alone, or lazertinib alone.
Lazertinib plus amivantamab demonstrated a statistically significant improvement in progression-free survival compared with osimertinib (hazard ratio, 0.70; P < .001). Median progression-free survival was 23.7 months with the combination vs 16.6 months osimertinib alone and 18.5 months with lazertinib alone.
The median duration of response was 9 months longer with the combination compared with osimertinib (25.8 months vs 16.7 months).
The most common adverse reactions (≥ 20%) were rash, nail toxicity, infusion-related reactions (amivantamab), musculoskeletal pain, edema, stomatitis, venous thromboembolism, paresthesia, fatigue, diarrhea, constipation, COVID-19, hemorrhage, dry skin, decreased appetite, pruritus, nausea, and ocular toxicity.
“A serious safety signal of venous thromboembolic events was observed with lazertinib in combination with amivantamab and prophylactic anticoagulation should be administered for the first four months of therapy,” the FDA noted in a statement announcing the approval.
Results from MARIPOSA were first presented at the European Society for Medical Oncology 2023 Congress and published in The New England Journal of Medicine in June. Longer-term follow-up data from MARIPOSA will be presented at the International Association for the Study of Lung Cancer 2024 World Congress on Lung Cancer in September.
A version of this article appeared on Medscape.com.