Relief Therapeutics Announces Positive Results from Pivotal Bioequivalence Study of RLF-OD032
Relief Therapeutics (OTCQB:RLFTF) reported positive pivotal bioequivalence results for RLF-OD032, a ready-to-use liquid sapropterin formulation for phenylketonuria (PKU). The randomized, open-label, two-way crossover study met its primary pharmacokinetic endpoints and demonstrated bioequivalence to KUVAN Powder under fed conditions.
RLF-OD032 was well tolerated with no serious adverse events reported in the pre-database lock analysis. The company expects to complete final data verification, finish CMC activities, and file a 505(b)(2) NDA in early 2026 with a planned 10-month FDA review.
Relief Therapeutics (OTCQB:RLFTF) ha riportato risultati pivotal bioequivalenti positivi per RLF-OD032, una formulazione liquida pronta all'uso di sapropterina per la fenilchetonuria (PKU). Lo studio randomizzato, aperto, a due vie crossover ha rispettato i suoi endpoint farmacocinetici primari e ha dimostrato bioequivalenza rispetto al KUVAN Powder in condizioni di alimentazione.
RLF-OD032 è stato ben tollerato, con nessun evento avverso grave riportato nell'analisi pre-chiusura del database. L'azienda prevede di completare la verifica finale dei dati, terminare le attività CMC e presentare una NDA 505(b)(2) entro l'inizio del 2026, con una prevista revisione FDA di 10 mesi.
Relief Therapeutics (OTCQB:RLFTF) informó resultados pivotal bioequivalentes positivos para RLF-OD032, una formulación líquida de sapropterina lista para usar para la fenilcetonuria (PKU). El estudio aleatorizado, abierto, de dos vías en crossover cumplió sus endpoints farmacocinéticos primarios y demostró bioequivalencia con KUVAN Powder en condiciones de fed.
RLF-OD032 se toleró bien con ningún evento adverso grave reportado en el análisis previo al cierre de la base de datos. La compañía espera completar la verificación final de datos, terminar las actividades CMC y presentar una NDA 505(b)(2) a principios de 2026, con una prevista revisión de la FDA de 10 meses.
Relief Therapeutics (OTCQB:RLFTF)는 RLF-OD032에 대한 긍정적 핵심 생물학적 동등성 결과를 발표했습니다. 이 Ready-to-use 액상 sapropterin 제형은 페닐케톤뇨증(PKU)을 위한 것입니다. 무작위 배정, 공개 라벨, 양방향 교차 시험은 주요 약동학적 엔드포인트를 충족했고 KUVAN Powder와 비교 시 식후 상태에서 생물학적 동등성을 입증했습니다.
RLF-OD032은 전자 데이터베이스 잠금 전 분석에서 중대한 이상반응이 보고되지 않았다고 보고되었으며, 회사는 최종 데이터 확인을 완료하고 CMC 활동을 마무리한 뒤 2026년 초에 505(b)(2) NDA를 제출하고 FDA의 10개월 심사를 계획하고 있습니다.
Relief Therapeutics (OTCQB:RLFTF) a publié des résultats pivots de bioéquivalence positifs pour RLF-OD032, une formulation liquide prête à l’emploi de sapropterine pour la phénylcétonurie (PKU). L’étude randomisée en ouvert, en cross-over à deux bras a atteint ses critères pharmacocinétiques primaires et a démontré la bioéquivalence avec le KUVAN Powder en conditions d’alimentation.
RLF-OD032 a été bien toléré avec aucun événement indésirable grave reporté lors de l’analyse pré-verrouillage de la base de données. L’entreprise prévoit de terminer la vérification finale des données, d’achever les activités CMC et de déposer un NDA 505(b)(2) au début de 2026, avec une révision FDA prévue de 10 mois.
Relief Therapeutics (OTCQB:RLFTF) meldete positive zentrale Bioäquivalenz-Ergebnisse für RLF-OD032, eine sofort einsetzbare flüssige Sapropterin-Formulierung zur Behandlung der Phenylketonurie (PKU). Die randomisierte, offene, zweiwegige Cross-Over-Studie erfüllte ihre primären pharmakokinetischen Endpunkte und zeigte Bioäquivalenz zu KUVAN Powder unter Fütterungsbedingungen.
RLF-OD032 wurde gut vertragen, und in der Vor-Datenbank-Lock-Analyse wurden keine schweren unerwünschten Ereignisse berichtet. Das Unternehmen beabsichtigt, die endgültige Datenverifizierung abzuschließen, CMC-Aktivitäten zu beenden und im frühen 2026 eine 505(b)(2) NDA einzureichen, mit einer vorgesehenen FDA-Überprüfung von 10 Monaten.
Relief Therapeutics (OTCQB:RLFTF) أبلغت عن نتائج حاسمة إيجابية لمعادلة بيولوجية حيوية لـ RLF-OD032، تركيبة سائلة جاهزة من sapropterin لعلاج فنييل كيتونوريا (PKU). درست الدراسة العشوائية المفتوحة ذات الاتجاهين تحققت من نقاطها الديناميكية الدوائية الأساسية وأظهرت التماثل الحيوي مع KUVAN Powder في ظروف التغذية.
تم تحمل RLF-OD032 بشكل جيد مع عدم الإبلاغ عن حوادث خطيرة في التحليل قبل إغلاق قاعدة البيانات. تتوقع الشركة إكمال التحقق النهائي من البيانات، وإنهاء أنشطة CMC، وتقديم NDA من النوع 505(b)(2) في أوائل 2026 مع مراجعة FDA لمدة مخطط لها قدرها 10 أشهر.
Relief Therapeutics (OTCQB:RLFTF) 报告了对于 RLF-OD032 的正向关键生物等效性结果，这是一种用于苯丙酮酸血症（PKU）的现成液态 Sapropterin 制剂。该双盲随机、开放标签、两臂换叉研究达到其主要药代动力学终点，并在给药状态下对照 KUVAN Powder 显示生物等效性。
RLF-OD032 耐受良好，在数据库前锁分析中未报告 任何严重不良事件。公司预计完成最终数据验证，完成 CMC 活动，并于 2026 年初提交 505(b)(2) NDA，并计划进行 FDA 10 个月评审。
- Primary PK endpoints met demonstrating bioequivalence to KUVAN Powder
- No serious adverse events reported in the pivotal study
- Up to 100-fold reduction in dose volume versus current formulations
- 505(b)(2) NDA expected early 2026 with a 10-month FDA review
- Results reported from a pre-database lock (soft lock) analysis pending final verification
- Pivotal study was open-label, which may limit blinding-related robustness
- Regulatory approval not granted; NDA planned and subject to FDA review timelines
RLF-OD032 demonstrated bioequivalence to KUVAN® Powder
Study results support planned 505(b)(2) NDA submission in early 2026
GENEVA, SWITZERLAND / ACCESS Newswire / October 29, 2025 / RELIEF THERAPEUTICS Holding SA (SIX:RLF)(OTCQB:RLFTF)(OTCQB:RLFTY) (Relief, or the Company), a biopharmaceutical company committed to delivering innovative treatment options for select specialty, unmet and rare diseases, today announced positive results from its pivotal bioequivalence clinical study evaluating RLF-OD032, Relief's innovative and highly concentrated liquid formulation of sapropterin dihydrochloride, for the treatment of phenylketonuria (PKU).
The pivotal study achieved its primary pharmacokinetic endpoints, demonstrating that RLF-OD032 is bioequivalent to KUVAN ® Powder, the reference listed drug, as defined by the U.S. Food and Drug Administration. The randomized, open-label, two-way crossover study compared the pharmacokinetics of RLF-OD032 (administered without water) and the reference product (administered with water, as per its labeling) under fed conditions. RLF-OD032 was well tolerated, with no serious adverse events reported. These results are based on a pre-database lock analysis (soft lock) and are expected to be confirmed following final data verification.
"We are extremely pleased to have advanced RLF-OD032 from concept to clinical validation in just three years, demonstrating its bioequivalence and confirming its potential as the first ready-to-use liquid sapropterin formulation," said Giorgio Reiner, chief scientific officer of Relief. "We believe this innovation will make a meaningful difference for individuals living with PKU, and we are now focused on completing the final regulatory steps to bring this product to market as quickly as possible."
RLF-OD032 offers a novel approach to PKU management by addressing key limitations of current sapropterin therapies that must be mixed with large volumes of water. As a ready-to-use, highly concentrated liquid, RLF-OD032 can be administered directly, without water, offering a portable, low-volume, and patient-friendly alternative. Its up to 100-fold reduction in dose volume simplifies daily treatment and is expected to improve adherence, optimize outcomes, and enhance quality of life for children and adults living with PKU.
Relief plans to proceed with final data verification and completion of CMC activities in preparation for submission of a 505(b)(2) New Drug Application (NDA). The NDA is expected to be filed in early 2026, seeking U.S. marketing approval for the treatment of PKU, and will be subject to a 10-month FDA review under the 505(b)(2) pathway.
ABOUT RLF-OD032
RLF-OD032 is an innovative, ready-to-use, portable and highly concentrated formulation of sapropterin dihydrochloride in liquid suspension for oral administration, designed to lower blood phenylalanine levels in adult and pediatric PKU patients. It offers a more patient-friendly solution by significantly reducing the volume of medication required compared to current formulations. This advancement aims to enhance compliance, particularly among pediatric patients, who often struggle with the high volumes associated with existing sapropterin treatments. If approved, RLF-OD032 would be the first and only portable, ready-to-use liquid formulation of sapropterin dihydrochloride, with pending patent protection extending through at least 2043.
ABOUT PHENYLKETONURIA
Phenylketonuria (PKU) is a genetic disorder caused by a deficiency of the enzyme needed to break down phenylalanine (Phe), leading to a toxic buildup of Phe from the consumption of foods containing protein or aspartame. Individuals with PKU lack the ability to metabolize Phe, which is present in many foods. Without treatment, PKU can cause severe neurological and developmental issues. The standard treatment involves a lifelong phenylalanine-restricted diet supplemented with amino acid-based, phenylalanine-free medical foods to prevent protein deficiency and optimize metabolic control. However, this diet is highly restrictive and often creates barriers to social interaction, limiting compliance and increasing the risk of poor disease management.
ABOUT RELIEF
Relief is a commercial-stage biopharmaceutical company dedicated to advancing treatment paradigms and improving the lives of patients with rare and debilitating diseases. With core expertise in drug delivery systems and drug repurposing, Relief's clinical pipeline includes innovative treatments designed to address critical unmet medical needs in rare dermatological, metabolic and respiratory conditions. The Company has also successfully brought several approved products to market through licensing and distribution partnerships. Headquartered in Geneva, Relief is listed on the SIX Swiss Exchange under the symbol RLF and quoted in the U.S. on OTCQB under the symbols RLFTF and RLFTY. For more information, visit www.relieftherapeutics.com.
CONTACT :
RELIEF THERAPEUTICS Holding SA
Jeremy Meinen
Chief Financial Officer
contact@relieftherapeutics.com
DISCLAIMER
This press release contains forward-looking statements, which may be identified by words such as "believe," "assume," "expect," "intend," "may," "could," "will," or similar expressions. These statements are based on current plans and assumptions and are subject to risks and uncertainties that could cause actual results, financial condition, performance, or achievements to differ materially from those expressed or implied. Such factors include, but are not limited to, changes in economic conditions, market developments, regulatory changes, competitive dynamics, and other risks or changes in circumstances. The clinical results described herein are based on a pre-database lock analysis and remain subject to confirmation upon completion of final data verification and database lock. This communication is provided as of the date hereof, and Relief undertakes no obligation to update any forward-looking statements contained herein as a result of new information, future events or otherwise.
KUVAN ® is a registered trademark of BioMarin Pharmaceutical Inc., which is not connected to Relief, and no association or endorsement is implied.
SOURCE: Relief Therapeutics Holding SA
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FAQ
What did Relief Therapeutics announce about RLF-OD032 on October 29, 2025 (RLFTF)?
When does Relief plan to file the 505(b)(2) NDA for RLF-OD032 (RLFTF)?
What FDA review timeline did Relief cite for the RLF-OD032 NDA (RLFTF)?
How does RLF-OD032 change dosing volume compared with existing sapropterin therapies (RLFTF)?
Were there any serious adverse events reported in the RLF-OD032 pivotal study (RLFTF)?
What study design demonstrated bioequivalence for RLF-OD032 (RLFTF)?
