Objective:

To reframe the interpretation of the signal linking quinolone antibiotics to pemphigoid by highlighting methodological confounders and proposing the inclusion of clinical pharmacists in pharmacovigilance.

Approach:

• Critical Reframing: The commentary aims to address unacknowledged confounding factors in the original study's findings.
• Identification of Gaps: It identifies limitations in external validity and generalizability that hinder the clinical application of the findings.
• Proposing a Roadmap: The commentary suggests a roadmap for integrating clinical pharmacists into pharmacovigilance practices.

Key Findings:

• Significant disproportionality signals for ofloxacin, levofloxacin, and ciprofloxacin were reported, primarily affecting elderly females.
• The original study did not exclude cases with concomitant high-risk drugs that could confound results.
• The literature evidence presented in the original study consists of only nine case reports, which cannot statistically validate the FAERS signal.

Interpretation:

The commentary emphasizes that the original study's findings require careful interpretation due to methodological limitations.

Limitations:

• The original study did not perform sensitivity analyses to exclude cases with concomitant high-risk medications.
• Inability to differentiate between drug-induced and infection-induced pemphigoid.
• Failure to adhere to established pharmacovigilance guidelines, impacting the study's transparency.

Conclusion:

The commentary highlights the need for rigorous studies to validate the association between quinolone antibiotics and pemphigoid.

Sources:

• Frontiers in Immunology