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A Clinical Trial Protocol (CTP), sometimes also referred to as Clinical Study Protocol (CSP) or simply as Protocol, is an overview of how the trial will be executed, it contains a description of the trial objective(s), design, methodology, statistical considerations, and organization of the trial. Background information and the rationale for the trial can be provided within the CTP or, if preferred, in other referenced documents. The purpose is to provide a roadmap for a diverse/broad audience that adequately addresses the key elements of the trial. It is also used as source material for several other documents including, but not limited to, the Informed Consent Form, Statistical Analysis Plan, and Clinical Study Report.
Note: The terms ‘clinical trial’ and ‘clinical study’ are sometimes used as synonyms but ICH E6 (R3) uses the term ‘clinical trial’, defined as any interventional investigation in human participants intended to discover or verify the clinical, pharmacological and/or other pharmacodynamic effects of an investigational product(s); and/or to identify any adverse reactions to an investigational product(s); and/or to study absorption, distribution, metabolism and excretion of an investigational product(s) with the object of ascertaining its safety and/or efficacy. Investigational products should be considered synonymous with drugs, medicines, medicinal products, vaccines, and biological products.
The CTP is not systematically updated but can be amended before or during the trial to change (add, remove, …) and/or clarify procedures and information. It is important to be clear, consistent, and ‘realistic’ to try to reduce or avoid protocol amendments (or protocol deviations).
The CTP is a multidisciplinary document involving a wide range of functions that provide input for several sections of the CTP. It can be quite simple and be written quickly with only a few drafts, which may be the case for Phase 1 or simple Phase 2 trials. The more complex CTP (for instance, in case of complicated Phase 2 or Phase 3 trials) can take months of discussion with multiple drafts. Patient input into the design is very valuable as they can identify potential issues regarding procedures or other aspects of the trial. Their involvement may improve recruitment and retention status.
Emtex Life Science medical writers can be involved in the document development process (eg, write with team input, circulate for review, implement review comments, facilitate meetings, ensure consistency) and can indicate issues or make useful suggestions.
FAQ: Clinical Trial Protocol
What is a Clinical Trial Protocol (CTP)?
A CTP is an overview of how the trial will be executed. Its purpose is to address the key elements of the trial and provide a roadmap for a diverse and broad audience.
What information does a CTP include?
A CTP includes background information, rationale, objectives, design details, procedures, statistical plans, and organizational aspects of the trial.
When is a CTP updated?
A CTP is not systematically updated but may be amended before or during the trial to clarify or modify procedures and reduce protocol deviations.
How can Emtex Life Science support the preparation of a CTP?
Emtex Life Science can write the CTP with team input, manage reviews, implement comments, facilitate discussions, and ensure consistency across sections.
Why is professional medical writing support valuable for a CTP?
Medical writing support ensures clarity, realistic and consistent procedures, reduction of amendment needs, and accurate communication of key trial elements.