> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/education/snomed-ct-education-editorial-guide/readme/authoring/domain-specific-modeling/clinical-finding-and-disorder/clinical-finding-and-disorder-modeling/specific-clinical-finding-and-disorder-modeling/overdose.md).

# Overdose

<mark style="color:$danger;">**This Editorial Guide is used for Education Purposes Only. It is used in the Authoring Courses and Certifications. It is based on the January 2026 Editorial Guide.**</mark>

## Overdose of illicit drug

708079007 |Overdose of illicit drug (disorder)| is modeled without a Causative agent because the term "illicit drug" may have differing local interpretations.

## Vaccine-related overdose

Vaccine-related overdose concepts in the Clinical Finding/Disorder hierarchy were inactivated in the January 2020 Release. They were replaced with concepts in the Event hierarchy, see 788094008 |Excessive dose of vaccine administered (event)| and subtypes.

When authoring, determine whether the concept describes an overdose, which is a *disorder* , or the administration or ingestion of an excessive dose, which is an *event*.

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