Which acronym indicates that a patient has no known drug allergies?

The acronym that indicates a patient has no known drug allergies is NKDA, which stands for "No Known Drug Allergies." This abbreviation is widely used in medical documentation and communication to quickly inform healthcare providers that the patient does not have a history of allergic reactions to medications. Understanding this acronym is essential as it helps in avoiding potential allergic reactions when prescribing or administering medications, ensuring patient safety.

The other acronyms presented do not have a standardized meaning in the medical field regarding allergies. NADA and NDKA, while they might seem applicable, do not convey the same information and could lead to confusion or misinterpretation in a medical context. Familiarity with recognizable and established acronyms like NKDA is crucial for clear and effective healthcare communication.