# `HL7v2.Segment.IAR`
[🔗](https://github.com/Balneario-de-Cofrentes/hl7v2/blob/v3.10.1/lib/hl7v2/segment/iar.ex#L1)

Allergy Reaction (IAR) segment — HL7v2 v2.7+.

Introduced in HL7 v2.7. Attaches to an IAM segment to provide
additional reaction details (e.g., severity, onset time, treatment
received) for a patient's adverse reaction.

5 fields per HL7 v2.7 specification.

# `t`

```elixir
@type t() :: %HL7v2.Segment.IAR{
  allergy_reaction_code: term(),
  allergy_reaction_duration: term(),
  allergy_severity_code: term(),
  extra_fields: term(),
  management: term(),
  sensitivity_to_causative_agent_code: term()
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*