NKA may refer to: "Now known as" "No known allergies" in medical jargon Initialism for North Korean Army, also known as the Korean People's Army Na+/K+-ATPase, an enzyme located in the plasma membrane in all animals Karate Canada, previously the "National Karate Association" of Canada New Kosovo Alliance, a political party Neurokinin A, a neurologically active peptide that seems to be involved in reactions to pain and the inflammatory responses Youth of Communist Liberation or nKA, a political party in Greece