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Phenytoin belongs to the imidazolidines, a subclass of azolidines within the organic compounds. It is an exogenous solid with the formula C15H12N2O2 and an average molecular weight of 252.27 g/mol. This compound is classified as an organoheterocyclic compound.
Used as an antiepileptic and anticonvulsant, phenytoin is a treatment for seizure (PMC9501146 ). It acts on sodium channels on the neuronal cell membrane to limit the spread of seizure activity and reduce seizure propagation. By promoting sodium efflux from neurons, the compound stabilizes the threshold against hyperexcitability caused by environmental changes or excessive stimulation capable of reducing membrane sodium gradient, which includes the reduction of post-tetanic potentiation at synapses. Loss of post-tetanic potentiation prevents cortical seizure foci from detonating. Phenytoin is an inhibitor of the sodium-dependent dopamine transporter (SLC6A3), Bile acid receptor (NR1H4), Nuclear receptor subfamily 1 group I member 2 (NR1I2), Voltage-gated inwardly rectifying potassium channel KCNH2, Sodium channel protein type 5 subunit alpha (SCN5A), Sodium channel protein type 1 subunit alpha (SCN1A), and 15 other proteins.
The compound is associated with osteomalacia (PMC2646121 ) and acts as a teratogenic agent. Recorded exposure routes include oral, intravenous, intramuscular, and parenteral administration. Phenytoin is found in 30 recorded sources, including healthcare and pharmaceutical products, building and construction materials such as stairs and ramps, household cleaning and consumer products, and food processing activities like the preparation of wort, food preservation, and fermentation processes for beer. It is also found in electrical and electronic equipment including antennas, amplifiers, and conductors.
Belongs to the class of organic compounds known as phenylhydantoins. These are heterocyclic aromatic compounds containing an imiazolidinedione moiety substituted by a phenyl group.
neurotoxin (PMC11901555 )?A chemical substance that interferes with the normal functioning of the nervous system
teratogenic agent ?A role played by a chemical compound in biological systems with adverse consequences in embryo developments, leading to birth defects, embryo death or altered development, growth retardation and functional defect.
Phenytoin acts on sodium channels on the neuronal cell membrane, limiting the spread of seizure activity and reducing seizure propagation. By promoting sodium efflux from neurons, phenytoin tends to stabilize the threshold against hyperexcitability caused by excessive stimulation or environmental changes capable of reducing membrane sodium gradient. This includes the reduction of post-tetanic potentiation at synapses. Loss of post-tetanic potentiation prevents cortical seizure foci from detonating adjacent cortical areas.
Oral, mouse: LD50 = 150 mg/kg; Oral, rat: LD50 = 1635 mg/kg.
Symptoms of overdose include coma, difficulty in pronouncing words correctly, involuntary eye movement, lack of muscle coordination, low blood pressure, nausea, sluggishness, slurred speech, tremors, and vomiting.
Treatment
Treatment is nonspecific since there is no known antidote. The adequacy of the respiratory and circulatory systems should be carefully observed and appropriate supportive measures employed. Hemodialysis can be considered since phenytoin is not completely bound to plasma proteins. Total exchange transfusion has been used in the treatment of severe intoxication in pediatric patients. (3)
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osteomalacia
Associated With?
Not Available
Osteomalacia is a disease characterized by the softening of the bones caused by impaired bone metabolism primarily due to inadequate levels of available phosphate, calcium, and vitamin D, or because of resorption of calcium. The impairment of bone metabolism causes inadequate bone mineralization. Osteomalacia in children is known as rickets, and because of this, use of the term "osteomalacia" is often restricted to the milder, adult form of the disease. Signs and symptoms can include diffuse body pains, muscle weakness, and fragility of the bones. The most common cause of osteomalacia is a deficiency of vitamin D, which is normally derived from sunlight exposure and, to a lesser extent, from the diet. Nursing home residents and the homebound elderly population are at particular risk for vitamin D deficiency, as these populations typically receive little sun exposure. Other groups at risk include individuals with malabsorption secondary to gastrointestinal bypass surgery or celiac disease. Similarly, individuals who immigrate from warm climates to cold climates, especially women who wear traditional veils or dresses that prevent sun exposure are also susceptible to osteomalacia.
A disorder characterized by laboratory test results that indicate an elevation in the concentration of blood sugar. It is usually an indication of diabetes mellitus or glucose intolerance. (NCI CTCAE)
A brain disease that is characterized by the occurrance of at least two unprovoked seizures resulting from a persistent epileptogenic abnormality of the brain that is able to spontaneously generate paroxysmal activity and typically manifested by sudden brief episodes of altered or diminished consciousness, involuntary movements, or convulsions. (DO)
Soil?Soil serves as a critical medium for plant growth and sustains various ecological functions; however, it can become a reservoir for synthetic chemical contamination.
Brushes?Brushes used in personal care and cosmetics can be a source of synthetic chemical contamination due to the materials and coatings used in their manufacturing.
Stairs And Ramps?Stairs and ramps in construction are often treated with various synthetic chemicals to enhance durability, slip resistance, and weather resistance.
Amplifiers?Amplifiers, commonly used in various electronic devices to enhance signal strength, can be a source of synthetic chemical contamination due to the materials and processes involved in their production and disposal.
Antennas?Antennas, commonly used in communication technologies, can be a source of synthetic chemical contamination through the materials and coatings used in their construction.
Conductors Or Conductive Bodies Characterised By The Conductive Materials?Conductors, or conductive bodies, are materials that allow the flow of electrical current, typically made from metals such as copper, aluminum, or silver.
Cores Yokes Or Armatures?Cores, yokes, or armatures are components commonly found in electrical devices, used to facilitate the magnetic and electrical functions within motors, transformers, and generators.
Discharge Lamps?Discharge lamps, including fluorescent and high-intensity discharge (HID) lamps, are commonly used for lighting applications due to their energy efficiency and brightness.
Electric Switches?Electric switches, integral components in numerous devices, can be a source of synthetic chemical contamination due to the materials and manufacturing processes involved in their production.
Electrically Stimulated Smoking Devices?Electrically stimulated smoking devices, commonly known as e-cigarettes or vape pens, utilize electrical components to heat a liquid solution, often containing nicotine, flavorings, and other additives, to produce an aerosol for inhalation.
Electrodes?Electrodes, used in various electrical and electronic applications, can be a source of synthetic chemical contamination due to the materials from which they are constructed and the processes involved in their manufacturing.
Fixed Capacitors And Their Manufacture?Fixed capacitors are passive electronic components used to store and release electrical energy, playing a critical role in various circuits.
Gas Filled Discharge Tubes With Solid Cathode?Gas Filled Discharge Tubes with Solid Cathodes are electrical components that facilitate the flow of current by ionizing gas within a sealed tube.
Hybrid Capacitors?Hybrid capacitors are energy storage devices that combine the properties of electrolytic and supercapacitors, utilizing a combination of electrochemical principles to achieve higher energy density and power density.
Line Transmission Systems?Line Transmission Systems, commonly used for the distribution of electrical energy, can be a source of synthetic chemical contamination through the insulation materials and coatings utilized in their construction.
Magnets?Magnets, commonly used in various electrical and electronic applications, can be a source of synthetic chemical contamination due to the materials used in their production.
Television Systems?Television systems can be a source of synthetic chemical contamination due to the various materials and components used in their manufacture and operation.
Food Preservation?Food preservation often involves the use of synthetic chemicals, such as preservatives, flavor enhancers, and color additives, to extend shelf life and enhance the sensory qualities of food products.
Bleaching Agents?Bleaching agents are chemical substances used to whiten or lighten materials, often employed in various cleaning products for their stain removal and disinfecting properties.
Non Electric Simulated Smoking Devices?Non-electric simulated smoking devices, often designed to mimic the experience of smoking without combustion, can be sources of synthetic chemical contamination due to the materials and chemicals used in their construction and operation.
Other Smoking Requisites?Other smoking requisites, including items such as lighters, matches, and rolling papers, can introduce synthetic chemical contamination through various components and additives.
Perfumes Within Detergents And Soaps?Perfumes within detergents and soaps are synthetic fragrance compounds added to enhance the sensory experience of cleaning products.
Soap Detergents?Soap detergents are synthetic surfactants designed to enhance the cleaning efficacy of water by reducing surface tension, allowing for better interaction with dirt and grease.
Tobacco Product Moisture Control?Tobacco product moisture control involves the use of synthetic chemicals to manage the humidity levels in tobacco products, aiming to preserve flavor and extend shelf life.
Tobacco Smoke Filters?Tobacco smoke filters are designed to reduce the inhalation of harmful substances in cigarette smoke, including tar and other particulate matter.
Making Cigars?The process of making cigars involves several steps, including the cultivation of tobacco, fermentation, and the application of various additives to enhance flavor and preservation.
Manufacture Preparation Of Tobacco Products?The manufacture and preparation of tobacco products involve various processes that can result in the introduction of synthetic chemicals into the environment.
Anchoring Equipment?Anchoring equipment, commonly used in marine applications, can be a source of synthetic chemical contamination due to the materials and coatings utilized in their manufacturing.
Gun Or Missile Launchers?Gun or missile launchers can serve as sources of synthetic chemical contamination through the use of propellants, explosives, and lubricants that may be released into the environment during their operation or maintenance.
Molluscicides?Molluscicides are synthetic chemicals specifically designed to control and eliminate mollusks, such as snails and slugs, which can be detrimental to crops and agricultural productivity.
Nematocides?Nematocides are synthetic chemicals specifically designed to control nematodes, which are microscopic roundworms that can cause significant damage to crops and plants.
Aftersun Products?Aftersun products are designed to soothe and hydrate the skin after sun exposure, often containing various synthetic chemicals such as emollients, preservatives, and fragrances.
Anti Perspirants Or Body Deoderants?Antiperspirants and body deodorants commonly contain synthetic chemicals such as aluminum compounds, parabens, and synthetic fragrances.
Depilatories?Depilatories are products designed to remove unwanted hair through the application of synthetic chemicals that break down the protein structure of hair, facilitating its removal.
Essential Oils Or Perfumes?Essential oils and perfumes are complex mixtures of volatile compounds derived from natural or synthetic sources, commonly used for their aromatic properties.
Eye Makeup Products?Eye makeup products, including mascaras, eyeliners, and eyeshadows, often contain a variety of synthetic chemicals such as pigments, preservatives, and film-forming agents.
Lip Care Products?Lip care products, including lipsticks, balms, and glosses, often contain a variety of synthetic chemicals such as parabens, phthalates, and synthetic fragrances.
Lip Makeup Products?Lip makeup products, such as lipsticks, lip glosses, and lip liners, often contain a variety of synthetic chemicals, including pigments, preservatives, and emollients.
Toys?Toys, particularly those made from synthetic materials such as plastics, can be a source of chemical contamination due to the presence of various additives and compounds used in their production.
Footwear?Footwear production often involves the use of various synthetic chemicals, such as adhesives, dyes, and treatments, which can contribute to environmental contamination.
Headwear?Headwear made from synthetic materials often incorporates chemicals used in the manufacturing and finishing processes, such as dyes, flame retardants, and water repellents.
Purses Luggage Hand Bags?Purses, luggage, and handbags are often manufactured using synthetic materials such as polyvinyl chloride (PVC), polyurethane, and various types of nylon.
Purses Money Bags Wallets?Purses, money bags, and wallets are often manufactured using synthetic materials, including plastics, polyurethanes, and various treated fabrics.
Yarns Or Threads?Yarns or threads used in textiles can be a source of synthetic chemical contamination due to the production processes and treatments they undergo.
Gaseous Fire Fighting?Gaseous fire fighting systems utilize synthetic chemicals, such as halocarbons and inert gases, to suppress fires through chemical and physical processes.
Airplanes And Helicopters?Airplanes and helicopters are significant sources of synthetic chemical contamination primarily through the use of aviation fuels, lubricants, and de-icing agents.
Unmanned Aerial Vehicles?Unmanned Aerial Vehicles (UAVs), commonly known as drones, utilize various synthetic chemicals in their manufacturing, operation, and maintenance processes.
Nitrogenous Fertilisers?Nitrogenous fertilizers are synthetic chemical compounds primarily used to enhance plant growth by supplying essential nitrogen, a crucial nutrient for photosynthesis and protein synthesis.
Cements?Cements are a composite material primarily used as a binding agent in construction applications, formed by the calcination of limestone and clay minerals at high temperatures.
Glass Coatings?Glass coatings are synthetic chemical formulations applied to glass surfaces to enhance properties such as durability, UV resistance, and aesthetic appeal.
Silica Glass?Silica glass, primarily composed of silicon dioxide (SiO2), is widely used in various applications, including windows, glass facades, and insulation materials.
Nanotechnology?Nanotechnology involves the manipulation of materials at the molecular or atomic level, typically within the range of 1 to 100 nanometers.
Mining Or Quarrying?Mining and quarrying operations can lead to synthetic chemical contamination through the release of various pollutants associated with the extraction and processing of minerals.
Embossing Machines?Embossing machines are industrial devices used to create raised patterns or designs on materials, including paper and fiber products.
Contact Lens Cases?Contact lens cases are small containers designed to store contact lenses in a sterile environment, typically made from various synthetic materials including plastics such as polypropylene or polycarbonate.
Coating Compositions?Coating compositions, which include paints, sealants, and varnishes, are formulated with a variety of synthetic chemicals such as solvents, resins, pigments, and additives.
Sludge Treatment?Sludge treatment involves the processing of waste materials generated from wastewater treatment plants, which often contain a variety of organic and inorganic substances.
Water, Wastewater, & Sewage Treatment?Water, wastewater, and sewage treatment processes are critical for managing and mitigating pollutants in water systems.
Phenytoin acts on sodium channels on the neuronal cell membrane, limiting the spread of seizure activity and reducing seizure propagation. By promoting sodium efflux from neurons, phenytoin tends to stabilize the threshold against hyperexcitability caused by excessive stimulation or environmental changes capable of reducing membrane sodium gradient. This includes the reduction of post-tetanic potentiation at synapses. Loss of post-tetanic potentiation prevents cortical seizure foci from detonating adjacent cortical areas.
Phenytoin acts on sodium channels on the neuronal cell membrane, limiting the spread of seizure activity and reducing seizure propagation. By promoting sodium efflux from neurons, phenytoin tends to stabilize the threshold against hyperexcitability caused by excessive stimulation or environmental changes capable of reducing membrane sodium gradient. This includes the reduction of post-tetanic potentiation at synapses. Loss of post-tetanic potentiation prevents cortical seizure foci from detonating adjacent cortical areas.
International Agency for Research on Cancer (2014). IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. - http://monographs.iarc.fr/index.php
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