Stability

Stability studies and shelf-life determination.

Accelerated Stability Testing — Design and Data Interpretation

How accelerated conditions are used to predict shelf life and where the approach has limits.

Bracketing and Matrixing — Reduced Stability Study Designs

How bracketing and matrixing reduce stability testing burden without compromising data integrity.

Cold Chain Stability — Excursion Impact Assessment Approach

How a temperature excursion during cold chain storage or transport is assessed for product impact.

ICH Q1A(R2) — Stability Testing Guideline Overview

The core requirements of ICH Q1A(R2) for stability testing of new drug substances and products.

In-Use Stability Study — Design for Multi-Dose Products

Why multi-dose products need a dedicated in-use stability study beyond standard shelf-life testing.

Photostability Testing — ICH Q1B Method Overview

How ICH Q1B photostability testing is designed and what triggers special labeling requirements.

Post-Approval Stability Commitment — Ongoing Stability Program Requirements

What an ongoing stability program must maintain after a product is approved and on the market.

Shelf-Life Determination — Statistical Approach per ICH Q1E

How regression analysis under ICH Q1E is used to statistically justify a proposed shelf life.

Stability Study Design — Zone-Based Storage Conditions (Zone I-IVb)

How climatic zones I-IVb determine long-term storage conditions for stability studies.

Stress Testing (Forced Degradation) — Design for New Drug Substances

How stress testing on a new drug substance informs degradation pathways and method development.