A recent case report has documented the first pediatric instance of Amoxicillin-induced ESDR. This rare condition, also known as Féréol-Besnier disease, typically presents as diffuse, itchy erythema followed by lamellar skin peeling. Because these symptoms can easily mimic common viral infections, clinicians must maintain a high index of clinical suspicion. Therefore, an accurate and timely diagnosis is essential for effective patient management.

The case involved an 8-year-old boy with a history of recurrent skin peeling after he took amoxicillin. First, the medical team evaluated the causality using the Naranjo probability scale. Moreover, they performed several diagnostic procedures, including skin biopsies and a positive oral provocation test (OPT). Although his initial skin tests were negative, the OPT confirmed that amoxicillin was the trigger. Consequently, the team established a diagnosis of Amoxicillin-induced ESDR.

Understanding Cross-reactivity in Amoxicillin-induced ESDR

Furthermore, the researchers investigated the child's cross-reactivity profile with other beta-lactam antibiotics. For instance, the boy tolerated phenoxymethylpenicillin and oxacillin during supervised challenges. However, he developed a positive reaction to cefadroxil during the second step of the oral test. This specific pattern indicates a selective cross-reactivity between aminopenicillins and certain cephalosporins. It likely occurs because these drugs share an identical side-chain structure. In addition, this finding suggests that the side-chain is the primary antigenic determinant rather than the core beta-lactam ring.

Finally, a customized allergy work-up is vital for future therapeutic guidance. Specifically, physicians should not automatically exclude all penicillins in patients with this condition. Instead, they should utilize controlled oral provocation tests to identify safe alternative medications. As a result, this targeted approach prevents the unnecessary use of broad-spectrum antibiotics and improves long-term outcomes for children. Thus, individualized testing remains the gold standard in pediatric allergy care.

Frequently Asked Questions

What is Erythema Scarlatiniforme Desquamativum Recidivans (ESDR)?

ESDR, or Féréol-Besnier disease, is a rare drug-induced hypersensitivity reaction. It manifests as a generalized red rash followed by skin desquamation or peeling. While rare, it can be triggered by antibiotics like amoxicillin.

Can a child with amoxicillin-induced ESDR take other antibiotics?

Yes, but only after a complete allergy work-up. Some patients exhibit selective cross-reactivity to specific cephalosporins like cefadroxil while tolerating other penicillins. Therefore, a specialized oral provocation test is necessary to find safe alternatives.

Disclaimer: This content is for informational and educational purposes only and does not constitute medical advice. Always seek the professional advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Refer to the latest local and national guidelines for clinical practice.

References

Bouraoui H et al. Amoxicillin-induced Erythema Scarlatiniforme Desquamativum Recidivans with cross-reactivity to cefadroxil in a child: A case report and review of literature. Br J Clin Pharmacol. 2026 Feb 13. doi: 10.1002/bcp.70495. PMID: 41689210.

Blumenthal KG et al. β-Lactam Allergy and Cross-Reactivity: A Clinician's Guide to Selecting an Alternative Antibiotic. NIH. 2021.

Misirlioglu ED et al. Frequency of selective immediate responders to aminopenicillins and cephalosporins in Turkish children. PubMed. 2017.