> ## 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 1

A small initial study to test a drug's safety, typically using healthy volunteers to understand its most common and serious side effects, as well as how the body processes and eliminates the drug.

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