Tonix Pharma (TNXP) Says Interim Analysis Shows TNX-102 SL Unlikely to Demonstrate Statistically Significant Improvement, Enrollment Stopped
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Tonix Pharmaceuticals Holding Corp. (Nasdaq: TNXP) has decided to stop enrollment in the Phase 3 RALLY study of TNX-102 SL (cyclobenzaprine HCl sublingual tablets) 5.6 mg for the management of fibromyalgia following an unblinded, pre-planned interim analysis by the Independent Data Monitoring Committee (IDMC) of the RALLY study. Based on interim analysis results of the first 50% (n=337) enrolled participants, the IDMC recommended stopping the trial for futility as TNX-102 SL is unlikely to demonstrate a statistically significant improvement in the primary endpoint of overall change from baseline in daily diary pain severity scores between those treated with TNX-102 SL 5.6 mg (2x 2.8 mg tablets) and those receiving placebo. Tonix remains blinded to the detailed interim analysis results and only received the recommendation made by the IDMC. Preliminary blinded safety data from these participants did not reveal any new safety signals, and the decision to discontinue enrolling new participants is not related to safety. The Company intends to continue studying those participants currently enrolled until completion and then proceed with a full analysis of the unblinded data, with the topline results expected to be reported in the fourth quarter of 2021, to determine the next steps in this program.
“We are surprised and disappointed that the interim analysis did not support continued enrollment in this Phase 3 RALLY study, especially considering the previous Phase 3 RELIEF study, which had a similar design and achieved statistical significance on the primary endpoint. After the currently enrolled participants complete the study, we will proceed with a full analysis of the unblinded data from the study to determine the next steps in this program,” commented Seth Lederman, M.D., President and Chief Executive Officer. “These results underscore the difficulty in managing and treating fibromyalgia. We thank the patients, caregivers and investigators who participated in the RALLY study.”
About the Phase 3 RALLY Study
The RALLY study is a double-blind, randomized, placebo-controlled trial designed to evaluate the efficacy and safety of TNX-102 SL (cyclobenzaprine HCl sublingual tablets). The two-arm trial has enrolled 514 participants across approximately 40 U.S. sites. For the first two weeks of treatment, there is a run-in period in which participants start on TNX-102 SL 2.8 mg (1 tablet) or placebo. After the first two weeks, all participants have the dose increased to TNX-102 SL 5.6 mg (2 x 2.8 mg tablets) or two placebo tablets for 12 weeks. The primary endpoint is daily diary pain severity score change (TNX-102 SL 5.6 mg vs. placebo) from baseline (using the weekly averages of the daily numerical rating scale scores), analyzed by mixed model repeated measures with multiple imputation.
Additional details about the RALLY study are available at clinicaltrials.gov (NCT04508621).
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