Core Insights - Neurocrine Biosciences presented new data from the Phase 3 CAHtalyst studies showing that CRENESSITY® (crinecerfont) leads to significant improvements in weight-related outcomes for patients with classic congenital adrenal hyperplasia (CAH) [1][2][5] Group 1: Study Overview - The Phase 3 CAHtalyst program is the largest interventional clinical trial for classic CAH, involving 285 patients (103 pediatric and 182 adult) [2][12] - The studies included a double-blind, placebo-controlled period followed by an open-label period where all patients received CRENESSITY [2][12] Group 2: Weight-Related Outcomes - Adult patients treated with CRENESSITY showed a mean BMI reduction of 0.8 kg/m² compared to a 0.4 kg/m² reduction in the placebo group at Month 12 [4][6] - 39% of adult patients on CRENESSITY achieved over a 5% weight reduction, compared to 14% in the placebo group [4][6] - Pediatric patients on CRENESSITY maintained reductions in BMI standard deviation scores (SDS) through Week 52, while those on placebo saw an increase [6][4] Group 3: Insulin Resistance Improvements - Significant reductions in insulin resistance were observed in both adult and pediatric patients treated with CRENESSITY compared to placebo [5][6] - The mean HOMA-IR score decreased more significantly in the CRENESSITY group than in the placebo group [6][7] Group 4: Safety Profile - CRENESSITY demonstrated a favorable safety profile, with common side effects being mild to moderate and not leading to discontinuation of the drug [8][20] - Common side effects in children included headache and stomach pain, while adults reported fatigue and headache [8][22] Group 5: Regulatory and Market Context - Data from the CAHtalyst studies supported the FDA approval of CRENESSITY in December 2024 [15] - CRENESSITY is positioned to evolve the standard of care for classic CAH by allowing for reduced glucocorticoid doses while maintaining or improving androgen control [2][16]