Rapport’s RAP-219 Clinical Trial Shows Promising Results

Promising Findings from Rapport's Phase 2a Clinical Trial

Rapport Therapeutics, Inc. (Nasdaq: RAPP) has achieved significant milestones with its investigational drug RAP-219 in the Phase 2a clinical trial targeting drug-resistant focal onset seizures. This clinical trial successfully met its primary endpoint, showcasing a statistically notable reduction in long episode seizures, marking a significant step forward for patients struggling with this condition. The outcomes have opened avenues for advancing RAP-219 into further clinical development, laying the groundwork for future Phase 3 trials.

Key Outcomes and Achievements in the Trial

The pivotal trial revealed that patients experienced an impressive 77.8% reduction in clinical seizures (p=0.01), and notably, 24% reached seizure freedom during the 8-week treatment phase with RAP-219 (p<0.0001). This data emphasizes the drug’s potential efficacy in providing meaningful relief for those with focal epilepsy, who often find current treatments inadequate.

Expert Insights on RAP-219's Potential

Dr. Jacqueline French, a principal investigator at the NYU Langone Health's Comprehensive Epilepsy Center, expressed optimism regarding the trial results. She highlighted the urgent requirement for innovative anti-seizure medications given that up to 40% of patients continue to experience seizures despite available therapies. Her encouraging remarks underline the clinical significance of the trial, stating that the biomarker responses corroborate the substantial reduction in seizure frequency.

Overview of the Trial's Structure and Design

This open-label, multi-center study enrolled 30 adult participants with drug-resistant focal onset seizures who were also utilizing the RNS system for better seizure management. The trial design involved a controlled dosage, with patients starting at 0.75 mg of RAP-219 per day for the first five days and subsequently increasing the dose to 1.25 mg for the remainder of the treatment period. The careful evaluation of the drug's impact on seizure frequency through an objective length of episode (LE) metric served as a cornerstone for the study's findings.

Detailed Topline Results and Efficacy Metrics

Results indicated that 85.2% of participants achieved a minimum of 30% reduction in long episodes (p<0.0001), reinforcing RAP-219's capability in managing seizures effectively. These strong findings underscored the potential of this therapy to address significant gaps in the current treatment landscape for epilepsy.

Safety and Tolerability Profile of RAP-219

In terms of safety, RAP-219 was well tolerated throughout the trial. Most treatment-emergent adverse events were mild, with a low discontinuation rate. No serious adverse events were reported, indicating a favorable safety profile that further supports the potential for RAP-219's use in clinical settings.

Future Directions for RAP-219 Development

Looking ahead, Rapport intends to propel RAP-219 into two Phase 3 pivotal trials planned for the third quarter of 2026, aiming to solidify its place as a viable option for patients with drug-resistant conditions. Furthermore, the company is also exploring a long-acting injectable (LAI) version of the drug, which may enhance patient adherence—a crucial factor in managing epilepsy effectively.

In addition, RAP-219 is being evaluated for efficacy beyond epilepsy, including potential applications in treating bipolar mania and diabetic peripheral neuropathic pain, with relevant updates expected in the near future.

Engagement with the Invested Community

Rapport Therapeutics will be engaging with the investment community to discuss these promising results and future plans. A conference call is scheduled to provide further insights into the data and the company's trajectory.

Frequently Asked Questions

What were the main findings of the Phase 2a clinical trial for RAP-219?

The trial demonstrated a 77.8% reduction in clinical seizures, with 24% achieving seizure freedom during the treatment period.

What does the future hold for RAP-219?

Rapport plans to initiate Phase 3 pivotal trials of RAP-219 in the third quarter of 2026 and is exploring a long-acting formulation to enhance patient adherence.

How well was RAP-219 tolerated among participants?

RAP-219 was generally well tolerated, with no serious adverse events reported and a low rate of treatment discontinuation.

What are the implications of these trial results?

The results indicate the potential of RAP-219 as a transformative treatment for patients with drug-resistant focal onset seizures, addressing a significant unmet need in epilepsy care.

Is RAP-219 being studied for other conditions?

Yes, Rapport is also evaluating RAP-219 in a Phase 2 trial for bipolar mania and planning a trial for diabetic peripheral neuropathic pain.

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