Regulatory Process Updated January 14, 2026

What is an FDA Inspection?

FDA inspections verify compliance with GMP and GCP requirements at manufacturing sites and clinical trial sites. Learn about inspection types and outcomes.

Definition

FDA Inspection is an official examination of facilities involved in drug development and manufacturing to verify compliance with FDA regulations. Inspections cover manufacturing sites, clinical trial sites, laboratories, and sponsor operations.

How FDA Inspections Work

FDA investigators visit sites to review records, observe operations, and verify compliance. Inspections can be pre-announced or unannounced depending on type and circumstances.

Inspection Types

TypePurposeTiming
Pre-Approval (PAI)Verify manufacturing capabilityBefore NDA/ANDA approval
SurveillanceRoutine compliance monitoringPeriodic
For-CauseInvestigate specific concernsAs needed
Bioresearch MonitoringVerify clinical trial integrityDuring/after trials

Inspection Outcomes

ClassificationMeaningConsequence
NAINo Action IndicatedAcceptable compliance
VAIVoluntary Action IndicatedMinor issues, voluntary correction
OAIOfficial Action IndicatedSignificant violations, enforcement

Common Inspection Observations

  1. Documentation Failures: Incomplete batch records
  2. Equipment Issues: Validation or maintenance gaps
  3. Laboratory Problems: Out-of-spec investigations
  4. Personnel Training: Inadequate training documentation
  5. Contamination Control: Environmental monitoring gaps

Why BD Teams Track FDA Inspections

For business development professionals, inspection history affects risk:

  • Deal Implication: OAI findings can delay approvals or trigger Warning Letters
  • Due Diligence Focus: Review inspection history and 483 responses
  • Opportunity Signal: Facilities with clean records command premium valuations

Frequently Asked Questions

What is an FDA inspection?

An FDA inspection is an official review of a facility to verify compliance with FDA regulations, including manufacturing, clinical trial, and laboratory sites.

What is a pre-approval inspection?

A pre-approval inspection (PAI) verifies that manufacturing facilities can produce the drug as described in the application before FDA grants approval.

What are FDA 483 observations?

Form FDA 483 lists observations of conditions that may violate regulations. Companies must respond with corrective actions.

What inspection outcomes are possible?

Outcomes include No Action Indicated (NAI), Voluntary Action Indicated (VAI), and Official Action Indicated (OAI), ranging from no issues to significant violations.

Can FDA inspect foreign facilities?

Yes, FDA inspects foreign manufacturing sites, though frequency may differ. Foreign facilities must meet the same standards as domestic sites.

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