Primary Risk Drivers
Below is a snapshot of domains that materially influence the MARA Rating.
Clinical effectiveness
The evidence from the phase 3 VERITAC-2 trial shows a moderate benefit for vepdegestrant in the ESR1-mutated subgroup, with a median progression-free survival (PFS) of 5.0 months compared to 2.1 months for fulvestrant. However, the overall population did not demonstrate a statistically significant improvement in PFS, indicating that the benefit is not universally applicable. Therefore, while there is strong evidence for the biomarker-defined population, the overall effectiveness is moderate.
Cost effectiveness
There is no publicly available cost-effectiveness evidence for vepdegestrant, including ICER or incremental QALY data. This absence of economic modeling significantly limits the ability to assess its cost-effectiveness compared to existing therapies, leading to a rating of C.
Quality of life
Vepdegestrant demonstrated significant improvements in HRQoL, with median time to deterioration in overall health status significantly longer than with fulvestrant. The use of validated instruments like EQ-5D-5L and EORTC QLQ-C30 supports the findings, although there is a lack of model-ready utility values. Overall, the evidence suggests moderate improvements in quality of life.
Supporting Domains
Safety and Adverse Effects
The safety profile of vepdegestrant is manageable, with common adverse reactions reported and a low discontinuation rate. However, the presence of QTc prolongation requires monitoring, which adds a burden. Overall, the safety evidence is acceptable for clinical use, but long-term safety data remain limited.
Comparator Selection
While fulvestrant was an appropriate comparator historically, it does not fully represent current practice, especially with the approval of elacestrant as a relevant alternative. This limits the relevance of the comparator used in the trial, leading to a B++ rating.
Patient Population and Subgroups
The trial population is broadly representative of the intended patient population, with significant inclusion of diverse demographics. Subgroup analyses also support consistent benefits across various patient characteristics, although some clinically important resistant populations were excluded.
Care Pathway Integration
Vepdegestrant can be integrated into existing care pathways with the requirement for ESR1 mutation testing. The oral administration route offers practical advantages over intramuscular options, although the need for monitoring adds complexity. Overall, it fits well within the current treatment landscape.
Resource Use and Cost Implications
While vepdegestrant is expected to reduce administration visits compared to fulvestrant, there is no public evidence quantifying the resource implications. The lack of detailed cost analyses and the potential burden of monitoring lead to a B+ rating.
Evidence Quality and Robustness
The evidence base is strong for short-term efficacy in the biomarker-defined population, supported by phase 3 data. However, gaps exist in long-term outcomes and economic modeling, which affects overall robustness. The confidence in the quality of evidence is high for the pivotal study but moderate for other aspects.
Uncertainty, Sensitivity, and Broader Impacts
There are significant uncertainties regarding overall survival, the lack of direct comparisons with competitors, and the dependence on biomarker testing infrastructure. These factors contribute to a high level of uncertainty in the broader context of treatment pathways.
