Title 21 › CHAPTER 9 — FEDERAL FOOD, DRUG, AND COSMETIC ACT › SUBCHAPTER V — DRUGS AND DEVICES › Part A — Drugs and Devices › § 356a
Drug makers with an approved drug or license may change how the drug is made and sell the changed drug only if they first check and prove how the change affects the drug’s identity, strength, quality, purity, and potency as those things relate to safety and effectiveness. If the change is a major one, the maker must send a supplemental application to the Secretary and get the Secretary’s approval before selling the changed drug. Major changes are those the Secretary decides could substantially harm the drug’s identity, strength, quality, purity, or potency. Examples of major changes include changing the drug’s formula or approved specifications (unless the Secretary exempts it) or a change the Secretary says needs a clinical study to show the drugs are equivalent. For changes that are not major, the Secretary can let makers sell the changed drug without a supplemental application but require a report later, or the Secretary can require a supplemental application first. Reports must include the validation information and be sent by the date the Secretary sets; the Secretary may allow one annual report for many small changes made during a single year. If a supplemental application is required, the maker may start selling 30 days after the Secretary gets the application unless told within those 30 days that approval is needed first. If the Secretary disapproves, the Secretary may order the maker to stop distribution. Definitions: holder — the company holding the approved application or license. major manufacturing change — a change the Secretary finds could substantially affect safety or effectiveness.
Full Legal Text
Food and Drugs, Source: USLM XML via OLRC
Legislative History
Reference
Citation
21 U.S.C. § 356a
Title 21, Food and Drugs
Last Updated
Sep 22, 2026
Release point: 119-110