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Related Experiment Videos

[Naproxen-induced pseudoporphyria].

J M Maerker1, A Harm, I Foeldvari

  • 1Klinik und Poliklinik für Dermatologie und Venerologie, Bereich Pädiatrische Dermatologie, Universitätsklinikum Hamburg-Eppendorf.

Der Hautarzt; Zeitschrift Fur Dermatologie, Venerologie, Und Verwandte Gebiete
|January 5, 2002
PubMed
Summary
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Long-term naproxen use for rheumatoid arthritis can cause pseudoporphyria, leading to scarring in sun-exposed areas. Early discontinuation of naproxen is crucial to prevent these adverse effects.

Area of Science:

  • Dermatology
  • Rheumatology
  • Pharmacology

Background:

  • Rheumatoid arthritis treatment often involves nonsteroidal anti-inflammatory drugs (NSAIDs).
  • Naproxen is a commonly prescribed NSAID for managing rheumatoid arthritis symptoms.

Observation:

  • A pediatric patient developed scarring on light-exposed skin after prolonged naproxen therapy.
  • No elevated porphyrin levels or increased photosensitivity were detected in the affected individual.

Findings:

  • Pseudoporphyria, a skin condition, occurs in 10-20% of patients on naproxen for over four weeks.
  • Naproxen presents a sixfold increased risk for pseudoporphyria compared to other NSAIDs.
  • The exact mechanism remains unclear, but phototoxic metabolite formation in susceptible individuals is hypothesized.

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Implications:

  • Dermatologists and rheumatologists must recognize the risk of naproxen-induced pseudoporphyria.
  • Promptly discontinuing naproxen therapy can prevent irreversible scarring in at-risk patients.