Costs per responder for patients with relapsed or refractory multiple myeloma treated with Talquetamab compared with...

To evaluate costs per responder for patients with triple-class exposed (TCE) relapsed or refractory multiple myeloma (RRMM) receiving talquetamab (Tal) on weekly (QW) and biweekly (Q2W) dosing schedules, compared with usual care from a United States commercial payer's perspective.

A cost per responder model was developed over a 6-month time horizon, incorporating pre-progression and post-progression costs. For Tal QW and Tal Q2W, pre-progression costs included costs of drug acquisition, inpatient step-up doses (hospitalization, pre-medication, and tocilizumab), outpatient visits, and monitoring. Pre-progression costs for usual care were estimated based on a weighted average of the 10 most used regimens in a real-world LocoMMotion/MoMMent study, including costs of acquisition, administration, co-medication, and monitoring. Post-progression costs included subsequent treatment for a subset of patients and terminal care costs prior to death. All costs were reported in 2025 United States Dollars. Clinical data of overall response rate (ORR), progression-free survival, and overall survival were obtained from an indirect treatment comparison using MonumenTAL-1 (September 2024 data cut) and LocoMMotion/MoMMent (October 2022 and August 2023 data cuts) as data sources. Deterministic sensitivity analyses and scenario analyses were conducted to assess the robustness of model results.

Over the 6-month period, the total cost of care was $179,556 for usual care, $295,993 for Tal QW, and $315,135 for Tal Q2W. Despite higher costs, Tal demonstrated superior ORR, resulting in lower cost per responder: $575,962 for usual care, $405,470 for Tal QW, and $443,165 for Tal Q2W, representing a 23-30% reduction in cost per responder with Tal. Sensitivity and scenario analyses showed consistent findings.

Although Tal QW and Q2W are associated with higher total per-patient costs compared with usual care, they offer improved clinical effectiveness, resulting in lower cost per responder. These findings suggest greater economic value for Tal in the treatment of TCE RRMM.