Which option expands NKDA?

• A. No Known Allergies
• B. Not Known Drug Allergies
• C. Not Known Allergies
• D. No Known Drug Allergies

Answer: (D)

NKDA stands for No Known Drug Allergies, the precise way clinicians document a patient’s allergy history for medications. This phrase communicates that, to the best of the available history, there are no known allergic reactions to drugs. It’s specific to medications and avoids implying allergies to non-drug substances. The other phrases aren’t standard or are too vague: No Known Allergies could suggest no allergies at all (not just drugs), Not Known Drug Allergies is awkward and not a recognized term, and Not Known Allergies is unclear. In practice, noting No Known Drug Allergies helps guide safe medication choices while continuing to review the patient’s history and monitor for any reaction.