Naprosyn: See NAPROXE. naproxen: A nonsteroidal, anti-inflammatory drug used for the treatment of osteoarthritis and rheumatoid arthritis. The trade name is Naprosyn. NAPWA: See NATIONAL ASSOCIATION OF PEOPLE WITH AIDS. narcotic: A drug, such as opium, that dulls the senses and induces sleep. nasal ulcer: An open sore or lesion of the nose, accompanied by sloughing of inflamed necrotic tissue. nasopharynx: The part of the pharynx that lies above the soft palate (postnasal area). National Academy of Sciences: Founded in 1863, it is an honorary organization that supports the promotion of science and engineering. Members are elected by the Academy in recognition of their contributions to either field. It was founded by an act of Congress to function as the official adviser on scientific and technical matters, and administers the National Academy of Engineering, National Research Council, and Institute of Medicine. National Academy of Sciences, Office of News and Public Information, 2101 Constitution Avenue N.W., Washington, DC 20418. Telephone: (202) 334-2000. National AIDS Clearinghouse (NAC): See CDC NATIONAL PREVENT I O N INFORMATION NETWORK.