Related Experiment Videos
Provocation tests in a chlormezanone-induced fixed drug eruption
1Department of Dermatology, College of Medicine, Seoul National University Hospital, Korea.
DICP : the Annals of Pharmacotherapy
|June 1, 1991
Summary
Fixed drug eruption (FDE) from chlormezanone is rare but possible. Topical provocation tests, specifically patch tests on previously affected skin, can safely identify chlormezanone as the FDE cause.
Area of Science:
- Dermatology
- Pharmacology
Background:
- Fixed drug eruption (FDE) is a specific type of adverse drug reaction.
- Chlormezanone is a medication that can potentially cause FDE, though rarely reported.
- Accurate identification of causative agents is crucial for managing FDE.
Observation:
- Topical provocation tests are proposed as a safer alternative to systemic tests for identifying FDE triggers.
- Patch testing was conducted on normal and prelesional skin using chlormezanone at 1% and 10% concentrations in petrolatum.
- A positive reaction was observed exclusively on the prelesional skin site tested with chlormezanone.
Findings:
- The patch test demonstrated a localized positive reaction on previously affected skin, indicating chlormezanone as the likely culprit.
- The topical test results were subsequently confirmed by oral provocation tests.
- This case highlights the diagnostic utility of topical provocation in suspected chlormezanone-induced FDE.
Implications:
- Topical provocation tests, particularly patch tests, show promise as reliable diagnostic and screening tools for FDE.
- This method offers a safer and more convenient approach compared to systemic provocation for identifying drug-specific FDE.
- Clinicians should consider chlormezanone as a potential cause of FDE and utilize topical testing for diagnosis.