Skip to main content

Caraco Pharmaceutical Laboratories v. Novo Nordisk A/S

Updated Oct 18, 2026

In brief

The Supreme Court sided with Caraco, allowing a generic maker to use the counterclaim to correct an inaccurate use code and overturning the Federal Circuit’s ruling.

Where it stands
Decided

Decided 9-0 · April 17, 2012 · Opinion by Justice Kagan

What it’s about
Caraco challenged Novo Nordisk’s description of which uses its Prandin patent covered while seeking approval for a generic drug.
Who it affects
Generic drug makers may use the counterclaim to challenge a brand’s use code when it inaccurately says a patent covers a particular way to use the drug.

Summary: written with AI from the case record.

Illustration for Caraco Pharmaceutical Laboratories, Ltd. v. Novo Nordisk A/S
Conceptual illustration · AI-generated

What it's about

The Supreme Court overturned the Federal Circuit and sent the case back (reversed and remanded), deciding that a generic maker may use the Hatch-Waxman Act’s counterclaim provision to correct a description that inaccurately says a patent covers a particular use.

Caraco sought approval for a generic version of Novo Nordisk’s Prandin and challenged Novo’s description of which uses its patent covered. Novo’s patent did not claim an approved method of use.

The Hatch-Waxman Act provides a path for generic drug approval, including for unpatented uses even when other approved uses remain under patent.

Question presented

1. Does the counterclaim provision of the Hatch-Waxman Act only apply if Novo's Prandin patent does not claim any approved method of use? 2. Does Novo's use code for Prandin qualify as "patent information submitted under subsections (b) and (c)" for the purposes of the act?

What the Court decided

Holding

A generic manufacturer may employ the counterclaim provision to force correction of a use code that inaccurately describes the brand’s patent as covering a particular method of using a drug. 601 F. 3d 1359, reversed and remanded.

Result
Reversed

The vote

  • Joined the judgment
  • Wrote an opinion
Majority · 9joined the Court's opinion
  1. Breyer
  2. Kaganwrote the opinion
  3. Thomas
  4. Scalia
  5. Kennedy
  6. Ginsburg
  7. Sotomayoralso wrote separately
  8. Roberts
  9. Alito
9 justices joined the judgment.

What's next

The Federal Circuit will take up the case again under the Supreme Court’s ruling.

Documents

2

Docket activity

10
  • New analysis added

    Oct 18, 2026 · Court records

  • AI analysis generated: Case Briefing

    Oct 18, 2026 · Generated

  • New analysis added

    Oct 18, 2026 · Court records

  • AI analysis generated: Impact Analysis

    Oct 18, 2026 · Generated

  • AI analysis generated: Decision Record

    Oct 18, 2026 · Generated

Show 5 more
  • AI analysis generated: Opinion Summary

    Oct 18, 2026 · Generated

  • Case data updated: summary, question_presented, generation_metadata

    Oct 18, 2026 · Court records

  • Case data updated: question_presented, extraction_metadata

    Oct 17, 2026 · Court records

  • Audio Recording added: Oral Arguments - Caraco Pharmaceutical Laboratories, Ltd. v. Novo Nordisk A/S

    Oct 30, 2014 · Court records

  • Opinion added: Caraco Pharm.

    Apr 17, 2012 · Court records

More questions

1
What does a use code describe?
It describes which uses of a drug the brand company says its patent covers.

Sources

Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.

Checked Oct 18, 2026Methodology

Court records and filings

Reporting and analysis