Understanding the Differences Between ICH GCP E6 R2 and R3: Why Compliance and Training Matter

Nov 6, 2025 | Blog

In the ever-evolving landscape of clinical research, staying up to date with regulatory standards is crucial. The International Council for Harmonisation (ICH) Good Clinical Practice (GCP) guidelines serve as the cornerstone for ensuring the safety, rights and well-being of clinical trial participants, while also maintaining data integrity. Recently, the shift from ICH GCP E6 R2 to E6 R3 has highlighted the need for researchers, sponsors and clinical teams to adapt to new expectations and requirements.

Key differences between ICH GCP E6 R2 and R3

While ICH GCP E6 R2 focused on providing a unified standard for the design, conduct, recording and reporting of clinical trials, the E6 R3 update introduces a number of enhancements aimed at modernising clinical research practices. Key differences include:

  1. Patient centricity – E6 R3 places greater emphasis on participant engagement and the protection of their rights. The guideline encourages a more participant-focused approach, ensuring that their needs and perspectives are considered throughout the trial.
  2. Risk-based approaches – While R2 introduced some aspects of risk-based monitoring, R3 expands on this concept, urging sponsors and investigators to implement comprehensive risk-based quality management strategies.
  3. Digital and decentralised trials – E6 R3 recognises the increasing use of technology in clinical research, including electronic records, telemedicine and remote monitoring. Compliance with digital processes is now more explicitly addressed.
  4. Training and competence – R3 underscores the importance of ongoing training for all personnel involved in clinical trials. It is no longer sufficient to have initial GCP training; continued competence and understanding of updated regulations are mandatory.
  5. New layout, structure and terminology – R3 comes with a fresh layout, clearer structure, and updated terminology – did you know the terms ‘patient’ or ‘subject’ should now never be used to refer to a clinical trial participant? This is just one of the key terminology changes. These changes reflect modern clinical trial practices, focusing on risk-based approaches, better quality management, and respect for participants’ autonomy.

Why compliance is non-negotiable

Regulatory compliance is far more than a bureaucratic formality. Failure to follow GCP guidelines can have serious consequences, including risks to participant safety, compromised trial data and, of course, failed audits. Auditors carefully examine how GCP is applied in practice, and any gaps in knowledge or training can quickly raise concerns. Keeping your team fully trained and aligned with E6 R3 requirements is therefore essential to manage risks and protect the integrity of your trial.

Both the EMA and FDA have indicated that E6 R3 should now be followed, meaning audits will increasingly focus on R3 expectations. If you are conducting a clinical trial in the US or EU, you should already be operating in line with R3. For those working elsewhere, the guidance will be implemented soon, so familiarising yourself with the new requirements now is the best way to stay ahead and ensure readiness for the changes it brings.

Align Your Training With ICH GCP E6 R3

With the transition to E6 R3, it is crucial that clinical research professionals update their training and hold a valid E6 R3 certificate. Our full or refresher GCP E6 R3 online courses are designed to provide comprehensive guidance on the latest standards, practical insights into implementation and strategies to ensure audit readiness. You can explore the full course here: Good Clinical Practice E6 R3 Online Course.

Stay ahead with fully updated R3 training

The shift to ICH GCP E6 R3 affects every aspect of clinical research, from GCP compliance to audit readiness, informed consent, CRA responsibilities and project management. Ensuring your team is trained in line with R3 is no longer optional, it is essential for maintaining trial integrity, protecting participants and passing audits with confidence. Insufficient training is among the most frequently cited findings in clinical trial audits. 

Regulatory authorities such as the FDA, EMA, and MHRA often flag missing or incomplete training records during inspections. They expect a valid E6(R3) training certificate in regions where it has already been implemented – and in the near future, this expectation will extend to many additional regions.

At Training Online 4U, all of our courses have been fully updated to reflect R3 requirements. Whether you are looking to refresh your GCP knowledge, prepare for audits, enhance informed consent procedures, train CRAs or strengthen project management skills, we have a course tailored to your needs.

Explore our comprehensive R3-aligned training suite today:

Investing in the right training not only ensures compliance, but also empowers your team to conduct high-quality, participant-focused research. Staying ahead of regulatory updates is a proactive step towards excellence in clinical trials and protecting the credibility of your research. Stay compliant, stay confident and stay ahead with Training Online 4U.

 

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