---
kind: "unit"
title: "21"
title_heading: "Food and Drugs"
key: "chI/subchA/part4"
level: "part"
label: "Part 4"
heading: "Regulation of Combination Products"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/21/chI-subchA-part4"
sections_count: 10
---

# Part 4 — Regulation of Combination Products

Title 21 C.F.R. — Food and Drugs › Chapter I — Food and Drug Administration, Department of Health and Human Services › Subchapter A — General

## Contents

- [Subpart A — Current Good Manufacturing Practice Requirements for Combination Products](/cfr/21/chI-subchA-part4-subpartA.md)
- [Subpart B — Postmarketing Safety Reporting for Combination Products](/cfr/21/chI-subchA-part4-subpartB.md)