Detailed GuideMHRA
Clinical trials for medicines: non-investigational medicinal products
Guidance on using non-investigational medicinal products in a clinical trial.
First published: Jun 24, 2025Last updated: Apr 27, 2026Changes: 5
Latest change: The amended Clinical Trials Regulations took full effect on 28 April 2026. As such, this guidance should now be considered effective and is no longer in draft.
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