---
kind: "unit"
title: "21"
title_heading: "Food and Drugs"
key: "chI/subchE/part511"
level: "part"
label: "Part 511"
heading: "New Animal Drugs for Investigational Use"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/21/chI-subchE-part511"
sections_count: 2
---

# Part 511 — New Animal Drugs for Investigational Use

Title 21 C.F.R. — Food and Drugs › Chapter I — Food and Drug Administration, Department of Health and Human Services › Subchapter E — Animal Drugs, Feeds, and Related Products

## Sections

- [§511.1. New animal drugs for investigational use exempt from section 512(a) of the Federal Food, Drug, and Cosmetic Act.](/cfr/21/511.1.md)
- [§511.3. Definitions.](/cfr/21/511.3.md)