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Related Experiment Videos

Beta-lactam antibiotic-induced pseudoporphyria.

Thuy L Phung1, Clare A Pipkin, Steven R Tahan

  • 1Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA. tphung@bidmc.harvard.edu

Journal of the American Academy of Dermatology
|July 29, 2004
PubMed
Summary

Beta-lactam antibiotics like ampicillin-sulbactam and cefepime can induce pseudoporphyria, a blistering skin condition. This case highlights the importance of considering drug-induced reactions in patients with systemic lupus erythematosus and renal disease.

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Area of Science:

  • Dermatology
  • Pharmacology
  • Nephrology

Background:

  • Systemic lupus erythematosus (SLE) and end-stage renal disease (ESRD) requiring hemodialysis are complex conditions.
  • Patients with these comorbidities may be susceptible to various adverse drug reactions.

Observation:

  • A 24-year-old African American woman with SLE and ESRD developed tense bullae on sun-exposed areas (forehead, cheeks).
  • The bullous lesions appeared after administration of ampicillin-sulbactam and cefepime, both beta-lactam antibiotics.

Findings:

  • Histological examination of the skin lesions mimicked porphyria cutanea tarda.
  • Crucially, no characteristic porphyrin abnormalities were detected, differentiating it from true porphyria cutanea tarda.
  • The pseudoporphyria resolved spontaneously upon discontinuation of the offending antibiotics.

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Implications:

  • This case suggests a potential link between specific beta-lactam antibiotics and the development of pseudoporphyria.
  • Clinicians should consider drug-induced pseudoporphyria in patients presenting with bullous eruptions, especially those on multiple medications.
  • Prompt recognition and cessation of the causative agent are key to managing this iatrogenic condition.