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Lantern Pharma Reports HARMONIC™ Data Showing LP-300 Progression-Free Survival Benefit Deepens with Treatment Duration in EGFR Exon 21 L858R Lung Cancer

$LTRNPress releaseJun 2, 2026, 8:13 AM ETRead the release

Lantern Pharma reported positive Phase 2 HARMONIC™ data for LP-300 in EGFR Exon 21 L858R-mutant NSCLC, showing that progression-free survival benefit deepens with treatment duration. Patients treated through up to six cycles achieved an 8.9-month median PFS, compared to 8.4 months in the overall L858R cohort, with a 77% clinical benefit rate and durable responses beyond two years.

Key figures

Drug Name
LP-300
Phase Of Trial
Phase 2
Cohort size l858r
15
Cohort size total
31
Hazard ratio l858r
0.37
Max cycles approved
8
Median pfs l858r overall
8.4 months
Median pfs l858r 6 cycles
8.9 months
Tumor reduction rate l858r
>70%
Clinical benefit rate l858r
77%

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