Application Pathways Updated January 14, 2026

What is an FDA Approval Letter?

An FDA Approval Letter grants permission to market a drug in the United States. Learn what approval means and what comes after FDA approval.

Definition

Approval Letter is FDA’s formal communication granting permission to manufacture and market a drug product in the United States. The letter confirms that the drug meets FDA’s standards for safety, efficacy, and manufacturing quality.

What Approval Means

FDA approval signifies:

  • Demonstrated safety for intended use
  • Proven efficacy for approved indications
  • Benefits outweigh known risks
  • Manufacturing meets quality standards
  • Labeling is accurate and complete

Post-Approval Requirements

Approval often comes with ongoing obligations:

RequirementDescription
Post-Marketing StudiesPhase 4 trials, safety registries
REMSRisk Evaluation and Mitigation Strategy if required
Adverse Event ReportingOngoing safety surveillance
Annual ReportsManufacturing and safety updates
Labeling UpdatesSafety information as needed

Why BD Teams Track Approvals

For business development professionals, FDA approvals are pivotal events:

  • Deal Implication: Approval triggers milestone payments and shifts focus to commercial partnerships
  • Due Diligence Focus: Review approved label for indication scope and any restrictions
  • Opportunity Signal: Newly approved products may need commercial partners, especially for smaller companies

Frequently Asked Questions

What is an FDA Approval Letter?

An Approval Letter is FDA's formal authorization allowing a sponsor to manufacture and market a drug in the United States for the approved indications.

What does FDA approval mean?

FDA approval means the agency determined the drug is safe and effective for its intended use, benefits outweigh risks, and manufacturing meets quality standards.

How long after approval can you sell a drug?

Technically immediately after approval, but commercial launch typically takes weeks to months for manufacturing scale-up and distribution preparation.

What comes after FDA approval?

Post-approval requirements may include Phase 4 studies, post-marketing commitments, REMS programs, and ongoing safety monitoring and reporting.

Can FDA revoke an approval?

Yes, FDA can withdraw approval if new safety concerns emerge or if the sponsor fails to meet post-marketing requirements.

Track Regulatory Filings with PharmaDB

Get real-time access to FDA approvals, pipeline data, and regulatory intelligence for BD teams.

Join the Waitlist