4A85.0

ICD-11 MMS 2026-01

Drug or pharmacological agents hypersensitivity

Description

Drug hypersensitivity reactions are the adverse effects of pharmaceutical formulations (including active drugs and excipients) that clinically resemble allergy. It belongs to type B adverse drug reactions, which are defined by the World Health Organization as the dose-independent, unpredictable, noxious, and unintended response to a drug taken at a dose normally used in humans. It covers many different clinical phenotypes with variable onset and severity.

Exclusions from above levels

  • 02 – Neoplasms
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 20 – Developmental anomalies

Child codes

  • 4A85.00 – Drug-induced liver hypersensitivity disease
  • 4A85.01 – Drug-induced kidney hypersensitivity
  • 4A85.02 – Drug-induced cytopenia
  • 4A85.03 – Drug-induced vasculitis
  • 4A85.04 – Multiple drug hypersensitivity syndrome
  • 4A85.0Y – Drug hypersensitivity of other specified type
  • 4A85.0Z – Drug hypersensitivity of unspecified type

Foundation children elsewhere

  • 3A70.10 – Drug-induced aplastic anaemia
  • 4A80.0 – Drug-induced bronchospasm
  • CA0A.0 – Samter syndrome
  • CA23.20 – Aspirin-induced asthma

Sibling codes

  • 4A85.1 – Hypersensitivity to herbal or alternative medical therapies
  • 4A85.2 – Food hypersensitivity
  • 4A85.3 – Allergic or hypersensitivity reactions to arthropods
  • 4A85.Y – Other specified complex allergic or hypersensitivity conditions
  • 4A85.Z – Complex allergic or hypersensitivity conditions, unspecified

Foundation entity

Drug or pharmacological agents hypersensitivity – http://id.who.int/icd/entity/405257730

Allowed postcoordination axes

Part of: 4A85: Complex allergic or hypersensitivity conditions › 04: Diseases of the immune system