What does the abbreviation NKDA indicate?

The abbreviation NKDA stands for "No known drug allergies." This term is commonly used in medical settings to indicate that a patient has not reported any allergies to medications. Understanding a patient's allergy history is crucial for healthcare professionals when prescribing treatments, as it helps to prevent adverse reactions and ensures patient safety. If a patient is known to have no drug allergies, medical providers can make informed decisions about medications without the risk of allergic complications.

In contrast, the other options present definitions that do not align with the standard medical terminology. "New known dental allergies" is not a commonly used abbreviation in healthcare. Similarly, "Need to know dietary allergies" does not pertain to drug allergies, and "No known disease associations" is unrelated to the allergy context. Thus, B is the clear and accurate choice in this scenario.