ICD-11 classes
04 Diseases of the immune system
Allergic or hypersensitivity conditions
4A85 — Complex allergic or hypersensitivity conditions
4A85.0 — Drug or pharmacological agents hypersensitivity
Drug eruptions
EH67 — Acne or acneform reactions attributable to drugs
EH67.0 — Drug-induced acute generalised exanthematous pustulosis

ICD-11 EH67.0 — Drug-induced acute generalised exanthematous pustulosis

This uncommon reaction to systemic medication is characterised by fever (generally on the same day as the start of the rash) and multiple, small, non-follicular pustules that arise on a widespread inflammatory erythema centred on the upper trunk and body folds. It may be difficult to differentiate from acute generalised pustular psoriasis. It usually appears within 24 hours of drug exposure. Antibiotics are probably the commonest precipitants although many drugs have been implicated.

The diagnosis excludes nothing.

It has no clarifying diagnoses.

The diagnosis is coded elsewhere:

• Acne or acneform reactions attributable to drugs #16376
• Acne or acneform reactions attributable to drugs #17065