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
4A85.04 — Multiple drug hypersensitivity syndrome

ICD-11 4A85.04 — Multiple drug hypersensitivity syndrome

Multiple drug hypersensitivity syndrome is defined as drug allergies to two or more chemically different drugs. It differs from cross-reactivity (due to structural similarities, common metabolic pathways, or pharmacological mechanisms), flare- up reactions (exacerbation of an existing drug allergy by the early switch of therapy to a novel drug), and multiple drug intolerance syndrome.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.