Adverse reactions

What does "Adverse reactions" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

"Adverse reactions" in medicine refers to unwanted or harmful effects that a person experiences after taking a medication or receiving a treatment. These reactions can range from mild side effects like a headache or rash, to severe ones like a heart attack or stroke. They can occur immediately after the treatment or may take some time to appear. Not everyone who takes a medication or receives a treatment will experience adverse reactions, as they can vary greatly from person to person.

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