Adverse event

What is Adverse event?

Adverse event definition and meaning on Health terms:
Any untoward (not favourable) medical occurrence in a patient, or clinical trial participant receiving a medicine, and which does not necessarily have a causal relationship with this treatment. Adverse events can therefore be: any unfavourable and unintended sign (e. g. an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicine, whether or not considered related to the medicine.