What does the term "contraindication" refer to in medical terminology?

The term "contraindication" refers specifically to reasons not to use a medication or to perform a certain procedure due to the potential for harm or adverse effects. This concept is crucial in medical practice because it helps healthcare providers make safe decisions regarding patient care. For instance, if a patient has a known allergy to a medication, that allergy is a contraindication for its use. Similarly, if a medication may exacerbate a pre-existing condition, such as using a certain pain reliever in patients with severe kidney impairment, this also constitutes a contraindication. Recognizing contraindications is essential for ensuring patient safety and preventing complications during treatment.