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FLU M
Flu-M (Флю-М) is a Russian trivalent inactivated split influenza vaccine by SPbSRIVS FMBA, registered 2018, WHO prequalified 2025; distinct from Flu-M Tetra and from FLU-v.
Flu season
Flu season: the annual fall-winter period of peak influenza circulation, peaking December-February in the U.S.; tracked by CDC FluView, managed with annually updated trivalent vaccines, 40-60% effective when matched.
Fluacrypyrim
Fluacrypyrim is a synthetic strobilurin-class acaricide that kills mites by inhibiting mitochondrial electron transport at complex III; introduced in 2002 for fruit crops and sold as Titaron, it is not approved in the European Union.
Fluad quadrivalent
Fluad Quadrivalent (FLUAD QUADRIVALENT, Influenza Vaccine, Adjuvanted) is Seqirus's MF59-adjuvanted, egg-based quadrivalent flu vaccine for adults 65 and older, US-approved in 2020 under accelerated approval, with 15 mcg hemagglutinin per strain and ACIP preferential recommendation.
Fluazaindolizine
Fluazaindolizine (Salibro, Reklemel) is a Corteva imidazopyridine non-fumigant nematicide discovered in 2017, registered in Canada in 2021 and by the US EPA on September 12, 2023; mode of action unknown.
Fluazifop
Fluazifop (fluazifop-P, Fusilade) is a Group 1 aryloxyphenoxypropionate herbicide, introduced 1980, that kills grass weeds by inhibiting acetyl-CoA carboxylase; the R-enantiomer is the active form.
Fluazolate
Fluazolate (异丙吡草酯, formerly isopropozole, JV 485) is a phenylpyrazole PPO-inhibitor herbicide developed by Monsanto from 1994 for pre-emergence weed control in wheat; CAS 174514-07-9, not EU-approved, patent expired 2014.
Flubendiamide
Flubendiamide (NNI-0001, CAS 272451-65-7) is the first phthalic acid diamide insecticide, an IRAC group 28 ryanodine receptor modulator against Lepidoptera, discovered by Nihon Nohyaku; EPA cancelled US registrations in 2016 over aquatic invertebrate risk.
Flubenzimine
Flubenzimine (BAY SLJ 0312, CAS 37893-02-0) is an obsolete thiazolidine acaricide and miticide once used on fruit crops; not EU-approved, banned in Turkey in 2009-2011, low acute toxicity but high log P.
Flublok
Flublok (Influenza Vaccine) is the first FDA-licensed recombinant influenza vaccine (2013), a trivalent, egg-free, 135 mcg HA insect-cell baculovirus product approved for ages 9 and older.
Flucarbazone sodium
Flucarbazone sodium (CAS 181274-17-9), sodium salt of flucarbazone, an ALS-inhibiting sulfonylurea herbicide developed by Bayer in 1995, used post-emergence against grass weeds in wheat and turf; not EU-approved, registered in the US and Canada.
Flucelvax quadrivalent
Flucelvax Quadrivalent (ccIIV4) is Seqirus's cell culture-based, egg-free inactivated quadrivalent influenza vaccine grown in MDCK cells, FDA-approved 2016 for ages 6 months and older, later superseded by trivalent Flucelvax.
Fluciclovine
Fluciclovine F18 (Axumin, 18F-FACBC) is a synthetic leucine-analogue PET radiotracer approved in 2016 (FDA) and 2017 (EMA) for imaging suspected prostate cancer recurrence after elevated PSA, now largely superseded by PSMA tracers.
Flucloxacillin
Flucloxacillin (Floxacillin, Floxapen) is a narrow-spectrum, β-lactamase-resistant penicillin antibiotic available only on prescription, used to treat Gram-positive infections including cellulitis, bone infections, and endocarditis.
Fluconazole
Fluconazole (Diflucan) is a triazole antifungal developed at Pfizer, launched 1990, inhibiting fungal ERG11 lanosterol demethylase; oral bioavailability over 90%, 30-hour half-life, used for Candida and Cryptococcus infections with known resistance mechanisms.
Flucycloxuron
Flucycloxuron (Andalin, OMS 3041) is a benzoylphenylurea insecticide-acaricide, IRAC group 15 chitin biosynthesis inhibitor, controlling mite eggs and larvae on citrus and pome fruit; largely obsolete and not EU-approved.
Fludioxonil
Fludioxonil (CAS 131341-86-1) is a synthetic phenylpyrrole fungicide derived from pyrrolnitrin, used as seed treatment, foliar spray, and post-harvest dip; the only commercial FRAC group 12 member, with debated HOG-pathway mode of action and EU endocrine-disruptor findings.
Fludrocortisone
Fludrocortisone (9α-fluorocortisol, Florinef) is a synthetic mineralocorticoid used for aldosterone replacement in adrenal insufficiency and CAH, and for orthostatic hypotension; potent MR agonist, 0.05–0.2 mg daily.
Flufenacet
Flufenacet (FOE 5043) is an oxyacetamide herbicide, HRAC Group 15 (K3), inhibiting very long chain fatty acid biosynthesis; developed by Bayer for cereals, its EU approval was not renewed in 2025 over thyroid endocrine and TFA water concerns.
Flufenamic acid
Flufenamic acid is a fenamate NSAID with analgesic, anti-inflammatory, and antipyretic effects, used in musculoskeletal and joint disorders and also a widely used ion channel research tool.
Flufenzin
Flufenzin (flufenzine), ISO name diflovidazin, CAS 162320-67-4, is a tetrazine acaricide with translaminar action against mite eggs, nymphs, and adults; developed by Agro-Chemie (Hungary), never EU-approved, used in India as 20% SC on brinjal and tea.
Fluid balance
Fluid balance: the homeostatic matching of water gains (drinking, food, metabolic water) to losses (urine, skin, gut, respiration). Regulated via osmoreceptors, vasopressin, Starling forces, and kidneys in humans; sodium and blood volume dominate in other vertebrates.
Fluid compartments
Fluid compartments: the body's water divided into intracellular fluid and extracellular fluid (plasma, interstitial, transcellular), about 42 L in a 70 kg man, governed by Starling forces and the revised glycocalyx model.
Fluid in peritoneal cavity
Fluid in peritoneal cavity (ICD-11 ME04.0), also called peritoneal effusion or ascites when pathological; free abdominal fluid, ~80% from cirrhosis in the US, diagnosed by paracentesis and SAAG ≥1.1 g/dL.
Fluid mosaic model
Fluid mosaic model: Singer and Nicolson's 1972 model of cell membranes as a fluid phospholipid bilayer with embedded amphipathic proteins; later updated with lipid rafts, cytoskeletal fences, and protein crowding.
Fluid Therapy
Fluid therapy is a medical treatment that restores the volume and composition of body fluids to normal water-electrolyte balance, given intravenously, orally, by gavage, or under the skin.
Fluid-attenuated inversion recovery MRI
Fluid-attenuated inversion recovery (FLAIR) is an MRI pulse sequence that suppresses cerebrospinal fluid signal so lesions near fluid stand out, especially in multiple sclerosis, first reported in 1992.
Fluindapyr
Fluindapyr (Onsuva, FMC/Isagro, 2021) is a racemic pyrazolecarboxamide SDHI (FRAC Group 7) fungicide, CAS 1383809-87-7, for cereals, soybeans, corn, and tree nuts; not EU-approved, JMPR 2022 ADI 0-0.04 mg/kg bw.
Fluindione
Fluindione (Previscan), an indanedione vitamin K antagonist oral anticoagulant, ATC B01AA12, marketed only in France; initiation banned since 1 December 2018 over severe immuno-allergic risk, use limited to renewals.
Flulaval quadrivalent
FluLaval Quadrivalent (FluLaval Q-QIV) is GSK's egg-based inactivated quadrivalent influenza vaccine, BLA 125163, first US-approved 2013, for persons 6 months and older, 0.5 mL intramuscular dose.