Contraindication — What It Means in Clinical Trials
Plain English Definition
A contraindication is a reason why a particular treatment should not be given to you because it could be harmful. For example, if you are allergic to an ingredient in a study drug, that drug is contraindicated for you. Contraindications are listed in the exclusion criteria to keep you safe.
Why It Matters
If a trial lists a contraindication that applies to you, it means the treatment could pose a specific risk to your health. This is not about bureaucracy — it is about keeping you safe.
Example
A listing might say: "Contraindications include known hypersensitivity to any study drug component, or active autoimmune disease requiring systemic treatment."
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