What is New Chemical Entity (NCE) or New Active Substance?

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Last updated: May 27, 2025View editorial policy

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From the Research

NCA stands for New Chemical Entity, which refers to a new drug candidate that has not been previously approved or marketed. This definition is based on the most recent and relevant evidence from the field of pharmacology and drug development 1.

Key Points to Consider

  • A New Chemical Entity (NCE) is a new molecular entity that has not been previously approved or marketed as a drug.
  • The designation of an NCE is significant, as it may confer regulatory exclusivity and provide an incentive for the development of novel compounds.
  • The terms New Chemical Entity (NCE), New Molecular Entity (NME), New Active Substance (NAS), and New Biological Entity (NBE) are often used interchangeably, but they have distinct meanings and are used in different contexts.

Evidence-Based Recommendation

The most accurate and up-to-date definition of NCA is New Chemical Entity, as defined in the study published in the Journal of Medicinal Chemistry in 2014 1. This study provides a clear and concise definition of NCE and its distinction from other related terms.

Clinical Implications

  • Understanding the definition and implications of NCE is crucial for healthcare professionals, researchers, and pharmaceutical companies involved in drug development and regulatory affairs.
  • The designation of an NCE can have significant implications for the development, approval, and marketing of new drugs, and can impact patient access to innovative treatments.

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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