Which of the following examples is categorized as an antipyretic?

The correct answer is Aspirin, which is classified as an antipyretic. Antipyretics are medications used to reduce fever by acting on the hypothalamus to promote heat loss and lower body temperature. Aspirin, in particular, works by inhibiting the production of prostaglandins, which are chemicals in the body that promote inflammation and can induce fever.

The other options are not classified as antipyretics. Coumadin, for instance, is an anticoagulant used to prevent blood clots, while Tetracycline is an antibiotic that treats bacterial infections but does not specifically function to reduce fever. Lidocaine is a local anesthetic used to numb specific areas of the body but has no effect on fever. Understanding the classification and intended use of these medications is crucial for their appropriate application in clinical practice.