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Category: Cell Therapy

The Livmarli Resubmission Journey: From FDA CRL to Approval 

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Hello Regulatory Scientists,  Today, let’s explore the journey of Livmarli (maralixibat) from receiving an FDA Complete Response Letter (CRL) to achieving approval. This case study provides valuable insights and lessons that can guide companies developing new drugs today.  Regulatory History and Initial Submission  Drug: Livmarli (maralixibat) Mechanism of Action: Apical sodium-dependent bile acid transporter (ASBT) inhibitor, […]

The Nurtec ODT Resubmission Journey: From FDA CRL to Approval 

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Hello Regulatory Scientists,  Today, let’s dive into the journey of Nurtec ODT (rimegepant) from receiving an FDA Complete Response Letter (CRL) to achieving approval. This case study provides valuable insights and lessons that can guide companies developing new drugs today.  Regulatory History and Initial Submission  Drug: Nurtec ODT (rimegepant) Mechanism of Action: CGRP (calcitonin gene-related peptide) […]

The Balversa Resubmission Journey: From FDA CRL to Approval 

The Balversa Resubmission Journey: From FDA CRL to Approval

Hello Regulatory Scientists,  Today, let’s dive into the journey of Balversa (erdafitinib) from receiving an FDA Complete Response Letter (CRL) to achieving approval. This case study provides valuable insights and lessons that can guide companies developing new drugs today.  Regulatory History and Initial Submission  Drug: Balversa (erdafitinib) Mechanism of Action: FGFR (fibroblast growth factor receptor) inhibitor, […]

The Mayzent Resubmission Journey: From FDA CRL to Approval 

Hello Regulatory Scientists, Today, let’s dive into the journey of Mayzent (siponimod) from receiving an FDA Complete Response Letter (CRL) to achieving approval. This case study provides valuable insights and lessons that can guide companies developing new drugs today. Regulatory History and Initial Submission Drug: Mayzent (siponimod) Mechanism of Action: Sphingosine-1-phosphate receptor modulator, which helps reduce the number of lymphocytes that can reach the central nervous system Indication: Treatment of relapsing forms of multiple sclerosis (MS) Initial Submission Date: February 2018 The Complete Response Letter (CRL) CRL Date: June 2018 CRL Concerns: Clinical Data Requirements: The FDA requested more detailed analyses of the clinical data to better understand the efficacy of the drug across different patient subgroups. Safety Profile: Concerns related to the drug’s long-term safety profile, including cardiovascular risks and potential adverse effects on liver function. Manufacturing Process: Issues related to the consistency and quality of the drug’s manufacturing process. Resubmission Strategy Novartis, the company behind Mayzent, implemented a comprehensive strategy to address the FDA’s concerns: Extended Data Analysis: Conducted additional analyses of the clinical trial data to provide a clearer picture of the drug’s efficacy across various patient subgroups. Enhanced Safety Monitoring: Provided additional data on the long-term safety profile, focusing on cardiovascular health and liver function. Improved Manufacturing Processes: Implemented improvements in the manufacturing process to ensure consistency and quality. Continuous FDA Engagement: Maintained open lines of communication with the FDA to ensure alignment on the resubmission strategy and clarify any outstanding questions. Resubmission Date: October 2018 Outcome Approval Date: March 2019 Mayzent was approved for the treatment of relapsing forms of multiple sclerosis, providing a new option for patients with this condition. Lessons Learned The journey of Mayzent from CRL to approval highlights several key lessons for drug developers: Thorough Data Analysis: Providing detailed and comprehensive data analyses is crucial to demonstrate a drug’s efficacy across different patient subgroups. Robust Safety Monitoring: Ensuring a thorough understanding and communication of the drug’s long-term safety profile can help mitigate regulatory concerns. Improved Manufacturing Standards: Ensuring the quality and consistency of the manufacturing process is essential for regulatory approval. Effective Use of Advisory Committees: Leveraging advisory committees can provide valuable feedback and support the resubmission process. Continuous FDA Engagement: Maintaining open and ongoing communication with the FDA helps align development efforts with regulatory expectations. Relevance for Current Drug Developers For companies developing drugs today, the Mayzent case underscores the importance of strategic planning and meticulous data analysis in the regulatory process. Here are some takeaways to help avoid a CRL and achieve first-cycle approval: Thorough Pre-Submission Preparation: Ensure that all aspects of your submission, including clinical data and manufacturing processes, meet FDA standards. Proactive Risk Management: Identify and address potential risks early in the development process to prevent issues from arising during FDA review. Engage with the FDA Early and Often: Regular interactions with the FDA can provide valuable guidance and help steer the development process. Utilize Advisory Committees: Seek feedback from advisory committees to validate data and address potential concerns. Invest in Quality Data: Prioritize the collection of high-quality, detailed safety and efficacy data to support the submission. By learning from the Mayzent resubmission experience, current drug developers can better navigate the regulatory landscape, avoid common pitfalls, and increase the likelihood of a successful first review cycle approval. Stay diligent and strategic, CERES Regulatory Services

Hello Regulatory Scientists,  Today, let’s dive into the journey of Mayzent (siponimod) from receiving an FDA Complete Response Letter (CRL) to achieving approval. This case study provides valuable insights and lessons that can guide companies developing new drugs today.  Regulatory History and Initial Submission  Drug: Mayzent (siponimod) Mechanism of Action: Sphingosine-1-phosphate receptor modulator, which helps reduce […]

The Imfinzi Resubmission Journey: From FDA CRL to Approval 

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Hello Regulatory Scientists,  Today, let’s delve into the journey of Imfinzi (durvalumab) from receiving an FDA Complete Response Letter (CRL) to achieving approval. This case study provides valuable insights and lessons that can guide companies developing new drugs today.  Regulatory History and Initial Submission  Drug: Imfinzi (durvalumab) Mechanism of Action: PD-L1 inhibitor, which helps the immune […]

The Zepatier Resubmission Journey: From FDA CRL to Approval

The Addyi Resubmission Journey: From FDA CRL to Approval

Hello Regulatory Scientists, Today, let’s explore the journey of Zepatier (elbasvir/grazoprevir) from receiving an FDA Complete Response Letter (CRL) to achieving approval. This case study provides valuable insights and lessons that can guide companies developing new drugs today. Regulatory History and Initial Submission Drug: Zepatier (elbasvir/grazoprevir) Mechanism of Action: NS5A inhibitor (elbasvir) and NS3/4A protease […]

The Brilinta Resubmission Journey: From FDA CRL to Approval

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Hello Regulatory Scientists, Today, let’s delve into the journey of Brilinta (ticagrelor) from receiving an FDA Complete Response Letter (CRL) to achieving approval. Understanding this case provides valuable insights and lessons that can guide companies developing new drugs today. Regulatory History and Initial Submission Drug: Brilinta (ticagrelor) Mechanism of Action: P2Y12 receptor antagonist, which inhibits […]

What to Do After Your First CRL from the FDA: A Story of Turning Setbacks into Success

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Introduction Imagine you’re a regulatory scientist at a pharmaceutical company. Your team has worked tirelessly for years, conducting clinical trials, collecting data, and finally submitting your New Drug Application (NDA) to the FDA. The anticipation builds as you await their decision, only to receive a Complete Response Letter (CRL). It feels like a punch to […]

CAR-T Cell Therapy in the FDA Spotlight

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CAR-T Cell Therapy in the FDA Spotlight. FDA mandated boxed warnings for CAR-T cell therapies, this followed a 28 November 2023 communication that FDA was “Investigating Serious Risk of T-cell Malignancy Following BCMA-Directed or CD19-Directed Autologous Chimeric Antigen Receptor (CAR) T cell Immunotherapies,” and a July — September 2023 Potential Signals of Serious Risks/New Safety Information Identified by the FDA Adverse Event […]

Unleashing the Power of Cell Therapy

Innovative Strategic Regulatory Services Designed to Achieve First Cycle Approvals & Rescue from Regulatory Challenges

Introduction: In the realm of medical advancements, cell therapy stands as a beacon of hope, offering a revolutionary approach to healing that transcends traditional treatment methods. This groundbreaking field harnesses the body’s own cellular power to combat diseases and promote regeneration. Join us on a journey through the wonders of cell therapy and discover how […]

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