PROTOCOLREFERENCE OUTLINE

Stability Study Protocol

A stability study protocol defining storage conditions, orientation, time points, testing matrix, and acceptance criteria for long-term, intermediate, and accelerated studies, with a bracketing/matrixing rationale where used. Aligned to ICH Q1A(R2) and the evaluation approach of ICH Q1E.

What a template is not

A template is a document baseline to adapt inside your own quality system. SPEQ does not approve, validate, or take responsibility for what you issue from it, and using one is not evidence of compliance.

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REGULATIONS MAPPED
ICH Q1A(R2)ICH Q1E
DOCUMENT TYPE
Protocol
LAST UPDATED
August 2026
PURPOSE

The protocol that fixes the study design before the first sample is pulled — conditions, orientation, time points, attributes, criteria — so the data can support a retest period or shelf life rather than merely describe what happened. The usual failure is a pull schedule that drifts, or a bracketing design justified after the fact. Which attributes are stability-indicating for your product is your determination, not the protocol’s.

What's Inside

✓Study design and storage conditions for long-term, intermediate and accelerated arms, with the climatic zone stated
✓Batch selection and container-closure orientation, including why upright and inverted are both, or not both, required
✓Testing matrix by attribute and time point, so an omitted pull is visible rather than discovered at submission
✓Acceptance criteria and the analytical methods that generate them, with method validation status referenced
✓Bracketing or matrixing rationale, written before the design is used rather than to defend it afterwards
✓Pull schedule with tolerance windows and the route for handling a missed or out-of-window pull
✓Data-evaluation approach agreed in advance, including how out-of-specification and out-of-trend results are handled

How to Use It

1Select batches and container-closure systems that represent what you intend to market; a study on an unrepresentative batch answers a different question
2Set conditions and time points for the climatic zones of your intended markets before the study starts, not as markets are added
3Define every attribute tested at every time point, and state which ones are stability-indicating and on what basis
4Justify any bracketing or matrixing design in the protocol; a reduced design defended after the data is read will not hold
5Build tolerance windows into the pull schedule and define the route for a missed pull before one happens under pressure
6Predefine how data will be evaluated and how an out-of-trend result is handled, so the analysis is not chosen after seeing it
DOCUMENT CONTENTS

The full section structure of this template — every section and sub-section, so you can use it as a baseline for your own site document.

—Document Control
› Document Information› Approval Signatures› Revision History› Distribution List
1Study Design and Storage Conditions
2Testing Matrix and Time Points
3Bracketing / Matrixing and Data Evaluation
REGULATORY CONTEXT

ICH Q1A(R2) defines the storage conditions, time points and study design expected for new drug substances and products, including when intermediate conditions are required; ICH Q1E covers how the resulting data is evaluated and extrapolated. Neither decides which attributes are stability-indicating for your formulation, which batches represent your commercial process, or whether your data supports the extrapolation you want. Those determinations belong to your organisation; the protocol structure here forces them to be written down before the first pull.

MAPPED STANDARDS
ICH Q1A(R2)ICH Q1E
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