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MUCINEX 12HR COLD & FEVER MULTI-SYMPTOM — FDA Complete Response Letter (NDA 217338)

Issued to RB Health (US) LLC. Application reviewed but not approved; deficiencies must be corrected.

Application

NDA 505b1 • 217338

Product

MUCINEX 12HR COLD & FEVER MULTI-SYMPTOM

Company

RB Health (US) LLC

Review center

CDER

Stage

Final Decision

Response due

July 26, 2025

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What did FDA decide for MUCINEX 12HR COLD & FEVER MULTI-SYMPTOM?

Source facts and Assyro context are separated so you can scan the action quickly without treating analysis as an FDA conclusion.

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Source facts

FDA's complete response letter contains source-text evidence related to Labeling, packaging, and proprietary name, Clinical efficacy and substantial evidence, Bioequivalence and pharmacokinetics, Device constituent and human factors. Theme counts identify where the letter discusses a topic; they do not replace review of the exact redacted letter.

Key details in this letter

  • 1Labeling, packaging, and proprietary name: 6 source-text matches.
  • 2Clinical efficacy and substantial evidence: 3 source-text matches.
  • 3Bioequivalence and pharmacokinetics: 2 source-text matches.
  • 4Device constituent and human factors: 1 source-text match.
Labeling, packaging, and proprietary nameClinical efficacy and substantial evidenceBioequivalence and pharmacokineticsDevice constituent and human factors

Suggested next step

Review the exact redacted FDA letter and address each stated deficiency before resubmission.

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Built from structured FDA metadata and deterministic source-text signals. Topic matches are navigation aids, not legal or regulatory conclusions. Verify material decisions against the original FDA document.

FDAPDFUpdated Jul 30, 2026

FDA source document

Read the full FDA complete response letter (PDF)

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Common questions about the MUCINEX 12HR COLD & FEVER MULTI-SYMPTOM complete response letter

What does this complete response letter mean for MUCINEX 12HR COLD & FEVER MULTI-SYMPTOM?

Application reviewed but not approved; deficiencies must be corrected. Requires resubmission addressing deficiencies. FDA issued this letter to RB Health (US) LLC on July 26, 2024.

What is NDA 217338?

NDA 217338 is the application under which FDA issued this complete response letter for MUCINEX 12HR COLD & FEVER MULTI-SYMPTOM to RB Health (US) LLC. It was reviewed by FDA CDER. The letter is dated July 26, 2024.

What happens after an FDA complete response letter?

FDA will not approve the application in its present form. The sponsor can resubmit after addressing every deficiency listed in the letter — which starts a Class 1 (two-month) or Class 2 (six-month) resubmission review clock — withdraw the application, or request an opportunity for a hearing.