> ## Documentation Index
> Fetch the complete documentation index at: https://glossary.micahealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Phase 3

A large-scale research stage that studies a drug's effectiveness and safety across diverse populations, using different dosages and combinations with other drugs. These studies involve more participants than earlier phases to gather comprehensive data.

[*Source*](https://clinicaltrials.gov/study-basics/glossary)