The purpose of this phase of testing during the drug approval process is to check the effectiveness of the product within large populations of patients. This phase is called:

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The phase of testing designed to check the effectiveness of a product within large populations of patients is known as the clinical investigation phase. This phase typically involves Phase III trials, where the drug is tested in larger patient groups to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug to be used safely.

The Purpose of This Phase of Testing During the Drug