In this episode of Let’s Combinate: Drugs and Devices, host Subhi Saadeh breaks down the 2025 draft update to the ICH Q1 guideline and explains what has actually changed and what has stayed the same.

ICH Q1 is the core stability guideline, and with the consolidation of multiple legacy guidelines into a single document, many readers have found the draft overwhelming. In this episode, Subhi steps back from line-by-line commentary and instead focuses on how to think about ICH Q1, how to read it efficiently, and how stability decisions are expected to be made.

The discussion covers why stability was one of the first topics harmonized by ICH, the fundamental stability concepts that still anchor the guideline, and how the revised structure emphasizes lifecycle management and data evaluation rather than introducing new science. Subhi also explains how ICH Q1 applies to drug-device combination products, including the role of the device as part of the container-closure system and why in-use stability often matters more than long-term storage.

This episode is part of an ongoing series walking through the ICH Q guidelines and is intended to help listeners navigate regulatory expectations with clarity and confidence.

Timestamps

00:00 Introduction

00:36 What ICH Q1 Is and Why It Exists

02:59 Core Stability Concepts in ICH Q1

04:51 What’s Changing in the 2025 Draft

05:35 How to Read ICH Q1

07:16 ICH Q1 and Drug-Device Combination Products

09:09 Closing and What’s Next

Subhi Saadeh is a Quality Professional and host of Let's Combinate. With a background in Quality, Manufacturing Operations and R&D he's worked in Large Medical Device/Pharma organizations to support the development and launch of Hardware Devices, Disposable Devices, and Combination Products for Vaccines, Generics, and Biologics. Subhi serves currently as the International Committee Chair for the Combination Products Coalition(CPC) and as a member of ASTM Committee E55 and also served as a committee member on AAMI's Combination Products Committee.For questions, inquiries or suggestions please reach out at letscombinate.com or on the show's LinkedIn Page.

223 - What’s Changing in ICH Q1 and What Isn’t: Understanding Stability Expectations