Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «N»:
Naprosyn: See: Naproxen....
Naproxen: A non-steroidal anti-inflammatory drug (NSAID) used for the management of mild to moderate pain, fever, and inflammation. Naproxen blocks the enzyme cyclooxygenase that makes prostaglandins, resulting in lower concentrations of prostaglandins. As a consequence, inflammation, pain and fever...
Narcan: Brand name for naloxone....
Narcolepsy: A neurological disorder marked by a sudden recurrent uncontrollable compulsion to sleep. Narcolepsy is often associated with cataplexy (a sudden loss of muscle tone and paralysis of voluntary muscles associated with a strong emotion), sleep paralysis (immobility of the body that occurs i...
Narcotic: 1. A drug that causes insensibility or stupor. A narcotic induces narcosis, from the Greek "narke" for "numbness or torpor."
2. A drug such as marijuana which is subject to regulatory restrictions comparable to those for addictive narcotics....
Narcotic antagonist treatment
Narcotic antagonist treatment: Treatment of narcotic addiction by using a medication that is an antagonist to opiates or any other drug to which a person is addicted. See: Methadone treatment program;
Naltrexone treatment program....
Nares: The nostrils or nasal passages. Nares is the Latin plural of naris, meaning nostril. Nares shares the same root with nose, nostril, nasal, pince-nez, and Nez Perce....
Naris: One of the two nares, the openings to the nasal cavities that allow air to flow in and out or, more simply, a nostril. Naris is the Latin singular of nares and is less used in medicine than nares....
NARP: NARP stands for Neuropathy, Ataxia and Retinitis Pigmentosa. NARP is a disease featuring weakness of the muscles near the trunk, ataxia (wobbliness), retinal disease, seizures and developmental delay.
NARP is a mitochondrial disease in that it is due to a mutation (change) in mitochondrial DNA...
Nasal: Having to do with the nose. Nasal drops are intended for the
nose, not (for example) the eyes. The word "nasal" came from the Latin
"nasus" meaning the nose or snout....
Nasal decongestant: A drug that shrinks the swollen membranes in the nose, making it easier to breath. Decongestants can be taken orally or by nasal drops or spray. Nasal decongestants should not be used for more than five days in a row without the doctor's consent, and then usually only when accomp...
Nasal flu vaccine
Nasal flu vaccine: A live attenuated (weakened) influenza virus vaccine that is administered as a nasal spray. The brand name for this vaccine is FluMist.
The nasal flu vaccine is recommended only for healthy people between 5 and 49 years of age. The American Academy of Pediatrics (AAP) recommends...
Nasal mucus: A slippery fluid produced by the membranes lining the nose. Excessive nasal mucus is the basis of a runny nose. Mucus is the Latin word for "a semifluid, slimy discharge from the nose."...
Nasal passage: The walls of the nasal passages are coated with respiratory mucous membranes which contain innumerable tiny hair-like cells that act to move waves of mucus toward the throat. Dust, bacteria, and other particles inhaled from the air are trapped by the mucus in the nose, carried back, s...
Nasal polyp: Benign growths that originate in the mucous membranes lining the nasal passages or paranasal sinuses. Polyps are believed to arise in the nasal mucosa as a result of chronic inflammation. Up to 4% of adults have nasal polyps; they can also occur in children, particularly those with chro...