ICH Guidelines

ICH M4E - Common Technical Document - Efficacy

Plain-language explanation, inspection context and common violation patterns.

What it says

The Efficacy module of a marketing application must be organized in a defined structure presenting clinical study reports, biopharmaceutic studies and other efficacy-related clinical data, following a harmonized format that allows the same core clinical efficacy data package to support applications across multiple ICH regions, completing the three-module structure alongside ICH M4Q and ICH M4S.

Paraphrased for plain-language clarity. Always verify against the current published regulation text.

What it means in practice

What inspectors look for

Most common violation

A post-approval formulation change implemented without reassessing whether it affects the bioavailability or food-effect characteristics that originally supported the product's approved dosing information.

Related regulations

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