What is the meaning of the abbreviation "ad" in medical terms?

The abbreviation "ad" in medical terminology stands for "right ear" and comes from the Latin term "auris dextra." This abbreviation is commonly used in prescriptions and medical documentation to specify that a medication or treatment should be administered to the right ear. Understanding this abbreviation is essential for pharmaceutical practice, as clear communication of treatment directions is critical for patient safety.

The other options represent different abbreviations: "au" signifies "both ears," "as" denotes "left ear," and "ENT" refers to "ear, nose, and throat," a specialized field of medicine. Recognizing these distinctions is crucial for anyone involved in patient care or medication management, ensuring that prescriptions are interpreted and executed accurately.