Drug provocation tests in hypersensitivity drug reactions

Area of Science:

• Clinical Immunology
• Pharmacology
• Allergy and Clinical Immunology

Background:

• Skin testing and in-vitro tests show decreased sensitivity for diagnosing immunologic drug hypersensitivity reactions (HSRs).
• Limited availability of certain diagnostic tests for non-immunologic HSRs necessitates alternative methods.
• Drug provocation testing (DPT) is a valuable tool for diagnosing HSRs.

Purpose of the Study:

• To review the principles and controversial issues surrounding DPT.
• To examine recent studies utilizing DPT as a diagnostic tool for drug HSRs.
• To highlight the increasing need for DPT in specific clinical scenarios.

Main Methods:

• Review of existing literature on DPT principles and applications.
• Analysis of recent studies employing DPT for drug HSR diagnosis.
• Evaluation of DPT's role in diagnosing reactions to various drug classes.

Main Results:

• DPT is recommended for HSR diagnosis across multiple drug classes, including beta-lactams, NSAIDs, and local anesthetics.
• The increasing need for DPT is driven by the limited sensitivity of skin tests and in-vitro assays.
• Allergologic work-up, including DPT, demonstrates a high negative predictive value (94-98%) for beta-lactam HSRs.
• DPT is useful for assessing cross-reactivity and tolerability among different drug classes.

Conclusions:

• DPT is frequently required for evaluating suspected drug HSRs.
• Standardization of DPT protocols is essential for wider acceptance and integration into diagnostic algorithms.
• Further research is needed to establish DPT as a standard diagnostic practice.