Clinical Research Glossary

adverse reaction adverse reaction


A health problem that happens during the study and is reported as possibly caused by the study treatment.

Example of adverse reaction in a sentence

Adverse reactions are important to track so that the effects of the study treatment are known.

More Info

Adverse reactions are health problems that are related to the study treatment. A rash that develops only after taking a drug is an adverse reaction.

Other info to think about when joining a study

While participating in a study, the study team may discuss adverse reactions with you.

Adverse reactions are health issues that have been found to be related to the study treatment. It is important for you to report any health problem or issue that happens while you are in a study, even if you don’t think it’s related.

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