25,729 articles
Nevus of Ito
Nevus of Ito (nevus fusco-caeruleus acromiodeltoideus) is a benign dermal melanocytosis: a unilateral blue-gray shoulder-girdle patch, histologically identical to nevus of Ota, treated with Q-switched lasers.
Nevus of Ota
Nevus of Ota, also called oculodermal melanocytosis or congenital melanosis bulbi, is a benign disorder producing blue-gray patches around the eye in the trigeminal nerve distribution, first described in 1939.
New York Academy of Medicine
New York Academy of Medicine (NYAM), founded 1847 in New York City, is an independent nonprofit advancing population health and health equity through research, a 200,000-volume medical library, the Journal of Urban Health, and nearly 2,000 elected Fellows.
New York State Department of Health
New York State Department of Health (NYSDOH), state health agency founded 1901, replacing the 1880 State Board of Health; runs Wadsworth Center labs, vital records, Medicaid, AIDS Institute; led by Commissioner James V. McDonald.
New York State Psychiatric Institute
The New York State Psychiatric Institute, founded in 1895, is a Columbia University-affiliated psychiatric research hospital in Washington Heights, Manhattan, operated by the New York State Office of Mental Health.
New-onset refractory status epilepticus
New-onset refractory status epilepticus (NORSE), including its subtype FIRES, is a clinical presentation of unexplained refractory status epilepticus in people without prior epilepsy, defined by 2018 consensus and managed per 2022 international recommendations.
Newborn screening
Newborn screening is a public health program that tests infants' blood, hearing, and oxygen saturation for treatable disorders before symptoms appear, diagnosing about 1 in 300 US newborns.
NewbornBathing trial
NewbornBathing (NCT06661408) is a Turkish randomized controlled trial by Kahramanmaras Sutcu Imam University testing video-based versus practical newborn bathing education for primiparous pregnant women, measuring knowledge, anxiety, and bonding at the first bath, 144 participants, three arms.
NexCAR19 (actalycabtagene autoleucel / talicabtagene autoleucel)
NexCAR19 (actalycabtagene autoleucel, also talicabtagene autoleucel) is India's first approved CAR-T therapy, a humanized CD19-directed autologous treatment for relapsed/refractory B-cell cancers, developed at IIT Bombay with Tata Memorial Centre and ImmunoACT, CDSCO-approved October 2023 at about one-tenth of US cost.
NIATx 200 trial
NIATx 200: cluster-randomized trial of 201 US addiction treatment clinics in five states testing four quality improvement strategies (interest circles, coaching, learning sessions, combination); coaching and combination cut wait times and raised admissions, none improved retention.
Nibrozetone
Nibrozetone, also known as RRx-001, is an investigational dinitroazetidine small molecule developed by EpicentRx as a radiosensitizer that dilates blood vessels, increasing tumor oxygenation and susceptibility to radiation therapy.
NIBS-tSMS/tDCS trial
NIBS-tSMS/tDCS (NCT06900959) is a Neuromed IRCCS randomized triple-masked trial in Pozzilli, Italy, testing combined transcranial static magnetic stimulation plus tDCS versus sham in 40 adults with neurological diseases, with one-week VAS pain as the primary outcome.
Nicardipine
Nicardipine, sold as Cardene and as Perdipine in Japan, is a dihydropyridine calcium channel blocker used to treat hypertension and chronic stable angina, available orally or intravenously.
Nicergoline
Nicergoline (Sermion) is a semisynthetic ergot alkaloid, alpha-1 adrenergic antagonist and vasodilator used for cerebrovascular and cognitive disorders; EU indications were withdrawn in 2013 over fibrosis and ergotism risk.
Nicholas T. Zervas
Nicholas T. Zervas was an American neurosurgeon who led the Neurosurgical Service at Massachusetts General Hospital from 1977 to 2000, known for long-term studies of transsphenoidal pituitary surgery.
Nick Hazen
Nick Hazen, full name Wayne W. Hazen, is an American hydrometallurgical engineer and president and CEO of Hazen Research in Golden, Colorado, elected to the National Academy of Engineering in 2021.
Nickel allergy
Nickel allergy, or nickel allergic contact dermatitis, is a delayed immune reaction to nickel in jewelry, fasteners, and electronics, affecting about 11.4% of people in Europe, North America, and China; diagnosed by patch testing and managed by avoidance.
Nicoboxil
Nicoboxil (2-butoxyethyl nicotinate, CAS 13912-80-6) is a nicotinic acid ester rubefacient combined with nonivamide in Finalgon topical analgesics for musculoskeletal and low back pain.
Nicolaides-Baraitser syndrome
Nicolaides-Baraitser syndrome (NCBRS, OMIM 601358), a rare autosomal dominant disorder caused by de novo SMARCA2 variants, with sparse hair, microcephaly, coarse face, prominent finger joints, seizures, and intellectual disability; main differential diagnosis Coffin-Siris syndrome.
Nicolau syndrome
Nicolau syndrome, or embolia cutis medicamentosa, is a rare iatrogenic injection-site reaction causing severe pain, livedoid skin lesions, and ischemic necrosis, first described in the 1920s with bismuth injections for syphilis and now most often linked to diclofenac.
Nicorandil
Nicorandil (Ikorel) is a nicotinamide nitrate ester antianginal drug, a KATP channel opener and nitric oxide donor, EMA-approved but not FDA-approved, used second-line for stable angina and limited by ulceration risk.
Nicotinamide
Nicotinamide (niacinamide), the amide form of vitamin B3, is an NAD+ precursor vitamin and drug: no flushing unlike nicotinic acid, used for pellagra (300 mg/day), skin cancer chemoprevention (500 mg twice daily), and dermatology.
Nicotine Chewing Gum
Nicotine chewing gum (nicotine polacrilex, brand Nicorette) is the first nicotine replacement therapy, developed in Sweden by Ove Fernö, FDA-approved 1984, OTC 1996; 2 mg and 4 mg doses roughly double quit odds versus control.
Nicotine dependence
Nicotine dependence, also called tobacco use disorder, is a chronic relapsing disorder of nicotine regulation involving craving, tolerance, and withdrawal, driven by nicotinic acetylcholine receptor effects on dopamine circuits, and treated with NRT, varenicline, bupropion, or cytisine.
Nicotine intoxication
Nicotine intoxication (ICD-11 6C4A.3), also called tobacco intoxication, is a transient toxic condition from nicotine exposure, with early stimulation then depression, vomiting, seizures, and possible cardiovascular collapse; no specific antidote exists.
Nicotine poisoning
Nicotine poisoning: toxic effects of nicotine swallowed, inhaled, or absorbed through skin or eyes, mainly from e-liquids; two-phase vomiting-to-paralysis syndrome, no antidote, children under 6 most affected.
Nicotine replacement therapy
Nicotine replacement therapy (NRT) is a smoking cessation treatment supplying nicotine through gum, patches, lozenges, inhalers, or sprays; trials show it raises quitting rates by 50% to 60%.
Nicotine withdrawal
Nicotine withdrawal: physical and psychological symptoms (cravings, irritability, insomnia, poor concentration) after stopping nicotine; begins 4-24 hours after last dose, peaks days 2-3, fades within 3-4 weeks; treated with NRT, varenicline, cytisine, bupropion, e-cigarettes, and counseling.
Nicotinic acid
Nicotinic acid (niacin, vitamin B3, pyridine-3-carboxylic acid) is a vitamin whose deficiency causes pellagra and a lipid-lowering drug that raises HDL and lowers triglycerides, LDL, and lipoprotein(a), but adds no cardiovascular benefit to statins.
Nidrodaya Rasa
Nidrodaya rasa is an Ayurvedic herbo-mineral rasa yoga (AFI Part II, 16:29) containing cannabis leaf, opium exudate, grape, amla, and a zinc-mercury cinnabar, dosed 500 mg to 1 g for insomnia, premature ejaculation, and debility.