Glossary Term

Adverse Events

any undesirable, unexpected medical occurrence that happens during or after the administration of a medication, treatment, or procedure, but is not necessarily caused by it. Adverse events can be mild or severe and can occur immediately or develop over time.

Synonyms:
Complications, Negative Reactions, Undesirable Events, Unintended Events
Examples

May include nausea, headache, dizziness, allergic reactions, organ damage, or even death.

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