Modified on March 5, 2026 to remove the “subscribe” option. This blog has been retired and replaced by the S.P.I.R.I.T. newsletter.

Tasha Mohseni
(Author)

Adnan Shaikh
(Author & Reviewer)
Good morning, good afternoon, and good evening Compliance Rockstars, Clinical Researchers, Ethics Educators, and Investigators from around the globe!
It’s hard to believe that January is coming to a close. It feels like just yesterday folks were sending their New Year wishes. It felt as though I was reviewing countless study submissions. I prefer to be on my toes than idle!
ICYMI, TikTok went dark on January 18, 2025 only to return on January 20, 2025. You can read about my insights here:
Now, back to today’s post. On January 6, 2025 the final version of the ICH GCP E6(R3) guidelines. Whether you’re a novice to clinical research (like me) or an expert, this is a HUGE deal. The last revision for ICH GCP E6(R2) was back in November 2016. Without writing this post, I could guess that there are significant differences. But I don’t like to guess…I like to know and understand why.
For background, I primary review IRB studies related to social, behavioral, and education research (SBER). I am extremely interested in learning more about clinical research ethics and clinical trials in general.
Therefore, I would like to thank Adnan Shaikh for his willingness to review and co-author this post!
In this post, we plan to describe in detail the differences between the E6(R2) version and the E6(R3) version. As a general disclaimer, these are our own interpretations of these guidelines. If you have any questions about these guidelines, you should always consult with your institution.
Tasha Mohseni’s POV on General Guideline Differences
Aside from document length, the table below summarizes the general differences between the guidelines:
| ICH GCP E6(R2) Summary | ICH GCP E6(R3) Summary |
| 1. Published in November 2016. 2. It emphasized updates needed to integrate modern technology and risk-based approaches into clinical trials. 3. Key updates included: A. Adoption of risk-based monitoring. B. Enhanced guidance on electronic records and data management. C. Emphasis on quality management systems tailored to clinical trial complexities. | 1. Published in January 2025. 2. Introduced broader revisions across clinical trial design, oversight, and ethical conduct, emphasizing: A. Greater focus on patient needs and preferences. B. Enhanced data reliability and transparency mechanisms. C. Encouragement of adaptive and innovative trial designs. D. Modernized guidance for handling big data and novel analytical tools. |
What Did ChatGPT Have to Say About The Guideline Differences?
As you all know from my Show and Tell: How to Write a Clear SBER Protocol post, I have my own personal ChatGPT account.
I can’t even quantify how long it took me to summarize the general differences for the two documents. Though this was interesting to review, I found it difficult to sift through the information. This might be because I haven’t had exposure in this area. I likely should have completed the GCP CITI training course to provide a foundation. Alas, here we are!
Out of curiosity and efficiency, I decided to upload both guidelines to ChatGPT and asked for itemized differences. Below is a complete response from ChatGPT:
“To provide a detailed, itemized comparison of the ICH E6(R2) and ICH E6(R3) documents, I will identify key differences across major sections and topics in both documents. This will include updates, additions, and revisions. Here’s an itemized list based on their content:
Introduction and Scope
- ICH E6(R2):
- Introduced updates to integrate risk-based monitoring and electronic systems.
- Focused on maintaining ethical principles while improving trial efficiency and data reliability.
- ICH E6(R3):
- Broader scope, emphasizing patient-centric approaches and advanced technologies like decentralized trials and real-world evidence.
- Greater emphasis on stakeholder collaboration and global harmonization.
Quality Management
- ICH E6(R2):
- Introduced a risk-based quality management system.
- Focused on identifying and mitigating risks to critical data and processes.
- ICH E6(R3):
- Expands the quality management framework to include:
- Adaptive approaches.
- Continuous quality improvement throughout the trial lifecycle.
- Integration of advanced analytics and real-world data for monitoring.
Data Management
- ICH E6(R2):
- Introduced guidance on electronic systems and electronic data capture.
- Added the requirement for an audit trail for all changes in electronic data.
- ICH E6(R3):
- Extends guidance on managing big data, artificial intelligence (AI), and machine learning (ML) tools.
- Updates standards for data security, privacy, and transparency in decentralized trials.
Trial Design
- ICH E6(R2):
- Focused on traditional trial designs, with some flexibility for centralized monitoring.
- ICH E6(R3):
- Encourages adaptive, innovative, and patient-centric trial designs.
- Includes guidance for decentralized clinical trials (DCTs) and the use of real-world evidence (RWE).
Investigator Responsibilities
- ICH E6(R2):
- Detailed investigator obligations, focusing on protocol adherence and oversight.
- Introduced responsibility for supervising delegated tasks.
- ICH E6(R3):
- Expands the investigatorโs role to ensure oversight in remote and virtual settings.
- Adds accountability for new roles introduced in decentralized models (e.g., telemedicine).
Monitoring
- ICH E6(R2):
- Introduced risk-based monitoring (RBM) for the first time.
- Emphasized centralized monitoring over traditional on-site monitoring.
- ICH E6(R3):
- Refines RBM principles and promotes greater use of AI-driven monitoring systems.
- Integrates remote monitoring for decentralized trials.
Patient-Centric Approaches
- ICH E6(R2):
- Focused primarily on data integrity and participant safety.
- ICH E6(R3):
- Strong emphasis on patient engagement, including:
- Simplified informed consent processes.
- Participant-centered trial design.
- Use of digital tools to enhance patient experience and access.
Ethical Considerations
- ICH E6(R2):
- Rooted in the principles of the Declaration of Helsinki, with updates for vulnerable populations.
- ICH E6(R3):
- Expands ethical considerations to include:
- Diversity and inclusion in clinical trial participation.
- Enhanced protection for participants in decentralized and global trials.
Use of Technology
- ICH E6(R2):
- Introduced electronic systems, requiring validation and audit trails.
- ICH E6(R3):
- Extends to newer technologies like AI, blockchain, and wearable devices.
- Requires validation and traceability for advanced digital systems.
Regulatory Harmonization
- ICH E6(R2):
- Harmonized standards for the EU, U.S., and Japan.
- ICH E6(R3):
- Broader harmonization efforts, including additional regions (e.g., Canada, Switzerland).
- Greater emphasis on mutual regulatory acceptance of trial data.
Risk-Based Approaches
- ICH E6(R2):
- Introduced risk-based approaches for trial management and monitoring.
- ICH E6(R3):
- Refines risk-based approaches with continuous risk assessment throughout the trial lifecycle.
- Incorporates new methodologies to address emerging risks in decentralized and digital trials.
Terminology and Glossary Updates
- ICH E6(R2):
- Updated glossary to include terms like “risk-based monitoring” and “certified copy.”
- ICH E6(R3):
- Expands glossary to include modern terms like “decentralized trials,” “real-world data,” and “validation of AI systems.”
These itemized differences highlight the evolution of clinical trial guidelines from E6(R2) to E6(R3), reflecting advancements in technology, trial design, and ethical considerations. Let me know if you want a deeper analysis of any specific section!”
At face value, this seems to be an impressive comparative analysis.
You might be wondering why I said the word “seems”.
I say this because I am acknowledging that I am not a subject-matter expert. I can’t even say that I have direct experience with this other than reading the guidelines themselves. I can’t necessarily validate if ChatGPT assessed the information correctly. I could have done more iterative prompting to receive an even more detailed response…but for what? This is why it is so important to have the expertise to verify the information is correct. Whether you become knowledgeable or collaborate with someone who has the expertise. Let’s see what Adnan Shaikh has to say about ChatGPT’s analysis!
Adnan Shaikh’s POV on the ChatGPT Analysis (in his own words)
Hey everyone! I hope you’re enjoying reading Tasha’s content. Here’s my take on the ICH GCP E6(R2) versus ICH GCP E6(R3).
The adoption ICH GCP E6(R3) introduces a transformative update to the principles and practices of clinical research:
- The ICH GCP E6(R2) guidelines were more focused
- They adhered to the protocol and followed the traditional approach in clinical trial studies, that has an impact of โone size fits all”
- While ICH GCP E6(R3) is more modern and advanced approach for clinical trial, it encourages โfit for purposeโ
- Which means that proportionality and risk-based approaches focus on the quality of clinical trials
- This is critical and fundamental to the safety of participants and the reliability of participants results
- Which means that proportionality and risk-based approaches focus on the quality of clinical trials
I humbly recognize that I am not as expert and that I am still learning
However, to summarize the overall concept of ICH GCP E6(R3), it focuses on the following:
- Emphasize proportionality risk-based approach,
- Incorporates innovative technologies, and
- Promotes adaptability to modern clinical trial design.
In the recent times, AI is claimed to be one of the best tools in helping with clinical research.
Now, I would like to share my POV on ChatGPT.
It is helpful in many ways, for example:
- Preparing document with little to no grammatical errors,
- Providing information on particular drug molecules, and
- Providing information on ICH GCP guidelines
When I prompted ChatGPT about the difference between ICH GCP E6(R2) vs ICH GCP E6(R3), I received the following graphical explanation:
As you can see, this further illustrates my point that ICH GCP E6(R3) highly focuses on modern adaptation. By implementing this concept, it can provide more flexibility in clinical research studies. In the era of AI and emerging technologies, itโs important to adapt the modern techniques in clinical trials. It is also criticial to note that this must be done without compromising confidentiality. We must adhere to ethical standards for the responsible use of these emerging technologies.
I am expressing my sincere gratitude to Tasha for involving me in this post. I ‘m looking forward to working with her on future projects!
We hope you find the content useful and thought-provoking! What do you think about current guidelines? Please lead the discussion and leave a comment below!
Again, thank you Adnan Shaikh for your invaluable expertise! For those who would like to learn more about him, you can follow him on LinkedIn and read his brief biography below.
You can follow Adnan on LinkedIn, Instagram, and WhatsApp!
Adnan Shaikha is a Pharm.D (Doctor of Pharmacy) candidate. He is completing his clinical pharmacy internship at New Civil Hospital. His degree will be from the Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat, India. He is expecting to graduate with his PharmD degree in June 2025. Additionally, he is doing a certification course on medical writing in clinical research.
We wish you the best of luck on this exciting endeavor and soon-to-be new chapter in your life!

