Anticonvulsants (also known as antiepileptic drugs, antiseizure drugs, or anti-seizure medications (ASM)) are a diverse group of pharmacological agents used in the treatment of epilepticseizures.[1] Anticonvulsants are also increasingly being used in the treatment of bipolar disorder[2][3] and borderline personality disorder,[4] since many seem to act as mood stabilizers, and for the treatment of neuropathic pain.[5] Anticonvulsants suppress the excessive rapid firing of neurons during seizures.[6] Anticonvulsants also prevent the spread of the seizure within the brain.[7]
Some anticonvulsants have shown antiepileptogenic effects in animal models of epilepsy.[20] That is, they either prevent the development of epilepsy or can halt or reverse the progression of epilepsy. However, no drug has been shown in human trials to prevent epileptogenesis (the development of epilepsy in an individual at risk, such as after a head injury).[21]
Many anticonvulsants can cause birth defects in the unborn child if taken while pregnant.[22]
Terminology
Anticonvulsants are more accurately called antiepileptic drugs (AEDs) because not every epileptic seizure involves convulsion, and vice versa, not every convulsion is caused by an epileptic seizure.[23] They are also often referred to as antiseizure drugs because they provide symptomatic treatment only and have not been demonstrated to alter the course of epilepsy.[24]
Approval
The usual method of achieving approval for a drug is to show it is effective when compared against placebo, or that it is more effective than an existing drug. In monotherapy (where only one drug is taken) it is considered unethical by most to conduct a trial with placebo on a new drug of uncertain efficacy. This is because untreated epilepsy leaves the patient at significant risk of death. Therefore, almost all new epilepsy drugs are initially approved only as adjunctive (add-on) therapies. Patients whose epilepsy is uncontrolled by their medication (i.e., it is refractory to treatment) are selected to see if supplementing the medication with the new drug leads to an improvement in seizure control. Any reduction in the frequency of seizures is compared against a placebo.[21] The lack of superiority over existing treatment, combined with lacking placebo-controlled trials, means that few modern drugs have earned FDA approval as initial monotherapy. In contrast, Europe only requires equivalence to existing treatments and has approved many more. Despite their lack of FDA approval, the American Academy of Neurology and the American Epilepsy Society still recommend a number of these new drugs as initial monotherapy.[21]
Drugs
In the following list, the dates in parentheses are the earliest approved use of the drug.
The benzodiazepines are a class of drugs with hypnotic, anxiolytic, anticonvulsive, amnestic and muscle relaxant properties. Benzodiazepines act as a central nervous system depressant. The relative strength of each of these properties in any given benzodiazepine varies greatly and influences the indications for which it is prescribed. Long-term use can be problematic due to the development of tolerance to the anticonvulsant effects and dependency.[32][33][34][35] Of many drugs in this class, only a few are used to treat epilepsy:
Diazepam (1963). Can be given rectally by trained care-givers.
Midazolam (N/A). Increasingly being used as an alternative to diazepam. This water-soluble drug is squirted into the side of the mouth but not swallowed. It is rapidly absorbed by the buccal mucosa.
Nitrazepam, temazepam, and especially nimetazepam are powerful anticonvulsant agents, however their use is rare due to an increased incidence of side effects and strong sedative and motor-impairing properties.
Potassium bromide (1857). The earliest effective treatment for epilepsy. There would not be a better drug until phenobarbital in 1912. It is still used as an anticonvulsant for dogs and cats but is no longer used in humans.
Photoswitchable analogues of carbamazepine (2024) are research compounds developed to control its pharmacological activity locally and on demand using light, with the purpose to reduce adverse systemic effects.[39] One of these compounds (carbadiazocine, based on a bridged azobenzene) has been shown to produce analgesia with noninvasive illumination in a rat model of neuropathic pain.
The ketogenic diet and vagus nerve stimulation are alternative treatments for epilepsy without the involvement of pharmaceuticals. The ketogenic diet consists of a high-fat, low-carbohydrate diet, and has shown good results in patients whose epilepsy has not responded to medications and who cannot receive surgery. The vagus nerve stimulator is a device that can be implanted into patients with epilepsy, especially that which originates from a specific part of the brain. However, both of these treatment options can cause severe adverse effects. Additionally, while seizure frequency typically decreases, they often do not stop entirely.[40][41]
The first anticonvulsant was bromide, suggested in 1857 by the British gynecologist Charles Locock who used it to treat women with "hysterical epilepsy" (probably catamenial epilepsy). Bromides are effective against epilepsy, and also cause impotence, which is not related to its anti-epileptic effects. Bromide also suffered from the way it affected behaviour, introducing the idea of the "epileptic personality" which was actually a result of medication. Phenobarbital was first used in 1912 for both its sedative and antiepileptic properties. By the 1930s, the development of animal models in epilepsy research led to the development of phenytoin by Tracy Putnam and H. Houston Merritt, which had the distinct advantage of treating epileptic seizures with less sedation.[44] By the 1970s, a National Institutes of Health initiative, the Anticonvulsant Screening Program, headed by J. Kiffin Penry, served as a mechanism for drawing the interest and abilities of pharmaceutical companies in the development of new anticonvulsant medications.
Marketing approval history
The following table lists anticonvulsant drugs together with the date their marketing was approved in the US, UK and France. Data for the UK and France are incomplete. The European Medicines Agency approves drugs throughout the European Union. Some of the drugs are no longer marketed.
Many of the commonly used anticonvulsant/anti-seizure medications (ASMs), such as valproate, phenytoin, carbamazepine, phenobarbitol, gabapentin have been reported to cause an increased risk of birth defects including major congenital malformations such as neural tube defects.[93] The risk of birth defects associated with taking these medications while pregnant may be dependent on the dose and on the timing of gestation (how well developed the baby is).[93] While trying to conceive a child and during pregnancy, medical advice should be followed to optimize the management of the person's epilepsy in order to keep the person and the unborn baby safe from epileptic seizures and also ensure that the risk of birth defects due to in utero exposure of anticonvulsants is as low as possible. Use of anticonvulsant medications should be carefully monitored during use in pregnancy.[94] For example, since the first trimester is the most susceptible period for fetal development, planning a routine antiepileptic drug dose that is safer for the first trimester could be beneficial to prevent pregnancy complications.[95]
There is inadequate evidence to determine if newborns of women with epilepsy taking anticonvulsants have a substantially increased risk of hemorrhagic disease of the newborn.[94]
There is little evidence to suggest that anticonvulsant/ASM exposure through breastmilk has clinical effects on newborns. The Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) study showed that most blood concentrations in breastfed infants of mothers taking carbamazepine, oxcarbazepine, valproate, levetiracetam, and topiramate were quite low, especially in relationship to the mother's level and what the fetal level would have been during pregnancy. (Note: valproic acid is NOT a recommended ASM for people with epilepsy who are considering having children.) [98]
Infant exposure to newer ASMs (cenobamate, perampanel, brivaracetam, eslicarbazepine, rufinamide, levetiracetam, topiramate, gabapentin, oxcarbazepine, lamotrigine, and vigabatrin) via breastmilk was not associated with negative neurodevelopment (such as lower IQ and autism spectrum disorder) at 36 months.[99]
Several studies that followed children exposed to ASMs during pregnancy showed that a number of widely used ones (including lamotrigine and levetiracetam) carried a low risk of adverse neurodevelopmental outcomes (cognitive and behavioral) in children when compared to children born to mothers without epilepsy and children born to mothers taking other anti-seizure medications. Data from several pregnancy registries showed that children exposed to levetiracetam or lamotrigine during pregnancy had the lowest risk of developing major congenital malformations compared to those exposed to other ASMs. The risk of major congenital malformations for children exposed to these ASMs were within the range for children who were not exposed to any ASMs during pregnancy.[100]
People with epilepsy can have healthy pregnancies and healthy babies. However, proper planning and care is essential to minimize the risk of congenital malformations or adverse neurocognitive outcomes for the fetus while maintaining seizure control for the pregnant person with epilepsy. If possible, when planning pregnancy, people with epilepsy should switch to ASMs with the lowest teratogenic risk for major congenital malformations as well as the least risk of adverse neurodevelopmental outcomes (e.g., lower IQ or autism spectrum disorder). They should also work with their healthcare providers to identify the lowest effective ASM dosage that will maintain their seizure control while regularly checking medication levels throughout pregnancy.[101]
Data from studies conducted on women taking antiepileptic drugs for non-epileptic reasons, including depression and bipolar disorder, show that if high doses of the drugs are taken during the first trimester of pregnancy then there is the potential of an increased risk of congenital malformations.[102]
Research
The mechanism of how anticonvulsants cause birth defects is not entirely clear. During pregnancy, the metabolism of many anticonvulsants is affected. There may be an increase in the clearance and resultant decrease in the blood concentration of lamotrigine, phenytoin, and to a lesser extent carbamazepine, and possibly decreases the level of levetiracetam and the active oxcarbazepine metabolite, the monohydroxy derivative.[94] In animal models, several anticonvulsant drugs have been demonstrated to induce neuronal apoptosis in the developing brain.[103][104][105][106][107]
^Joshi A, Bow A, Agius M (2019). "Pharmacological Therapies in Bipolar Disorder: a Review of Current Treatment Options". Psychiatria Danubina. 31 (Suppl 3): 595–603. ISSN0353-5053. PMID31488797.
^Keck PE Jr, McElroy SL, Strakowski SM (1998). "Anticonvulsants and antipsychotics in the treatment of bipolar disorder". The Journal of Clinical Psychiatry. 59 (Suppl 6): 74–82. PMID9674940.
^American Psychiatric Association, and American Psychiatric Association. Work Group on Borderline Personality Disorder. Practice guideline for the treatment of patients with borderline personality disorder. American Psychiatric Pub, 2001.
^McLean MJ, Macdonald RL (June 1986). "Sodium valproate, but not ethosuximide, produces use- and voltage-dependent limitation of high frequency repetitive firing of action potentials of mouse central neurons in cell culture". Journal of Pharmacology and Experimental Therapeutics. 237 (3): 1001–1011. PMID3086538.
^ abKammerer M, Rassner, M. P., Freiman, T. M., Feuerstein, T. J. (2 May 2011). "Effects of antiepileptic drugs on GABA release from rat and human neocortical synaptosomes". Naunyn-Schmiedeberg's Archives of Pharmacology. 384 (1): 47–57. doi:10.1007/s00210-011-0636-8. PMID21533993. S2CID1388805.
^Citraro R, et al. (2013). "Antiepileptic action of N-palmitoylethanolamine through CB1 and PPAR-α receptor activation in a genetic model of absence epilepsy". Neuropharmacology. 69: 115–26. doi:10.1016/j.neuropharm.2012.11.017. PMID23206503. S2CID27701532.
^Lampen A, Carlberg C, Nau H (2001). "Peroxisome proliferator-activated receptor delta is a specific sensor for teratogenic valproic acid derivatives". Eur J Pharmacol. 431 (1): 25–33. doi:10.1016/S0014-2999(01)01423-6. PMID11716839.
^Maguire JH, Murthy AR, Hall IH (1985). "Hypolipidemic activity of antiepileptic 5-phenylhydantoins in mice". Eur J Pharmacol. 117 (1): 135–8. doi:10.1016/0014-2999(85)90483-2. PMID4085542.
^Hall IH, Patrick MA, Maguire JH (1990). "Hypolipidemic activity in rodents of phenobarbital and related derivatives". Archiv der Pharmazie. 323 (9): 579–86. doi:10.1002/ardp.19903230905. PMID2288480. S2CID46002731.
^Frigerio F, Chaffard G, Berwaer M, Maechler P (2006). "The antiepileptic drug topiramate preserves metabolism-secretion coupling in insulin secreting cells chronically exposed to the fatty acid oleate". Biochem Pharmacol. 72 (8): 965–73. doi:10.1016/j.bcp.2006.07.013. PMID16934763.
^Güveli BT, Rosti RÖ, Güzeltaş A, Tuna EB, Ataklı D, Sencer S, Yekeler E, Kayserili H, Dirican A, Bebek N, Baykan B, Gökyiğit A, Gürses C (28 February 2017). "Teratogenicity of Antiepileptic Drugs". Clinical Psychopharmacology and Neuroscience: The Official Scientific Journal of the Korean College of Neuropsychopharmacology. 15 (1): 19–27. doi:10.9758/cpn.2017.15.1.19. ISSN1738-1088. PMC5290711. PMID28138106.
^Rogawski M (2021). "Chapter 24: Antiseizure Drugs". In Katzung B (ed.). Basic and Clinical Pharmacology, 15th Edition. McGraw-Hill Education. pp. 422–455.
^Browne TR. Paraldehyde, chlormethiazole, and lidocaine for treatment of status epilepticus. In: Delgado-Escueta AV, Wasterlain CG, Treiman DM, Porter RJ, eds. Status Epilepticus. Mechanisms of Brain Damage and Treatment (Advances in Neurology, Vol 34). New York, Raven Press 1983: 509–517
^Isojärvi JI, Tokola RA (December 1998). "Benzodiazepines in the treatment of epilepsy in people with intellectual disability". J Intellect Disabil Res. 42 (1): 80–92. PMID10030438.
^Dodson, W. Edwin, Giuliano Avanzini, Shorvon, Simon D., Fish, David R., Emilio Perucca (2004). The treatment of epilepsy. Oxford: Blackwell Science. xxviii. ISBN978-0-632-06046-7.
^Katz I, Kim J, et al. (August 2007). "Effects of lamotrigine alone and in combination with MK-801, phenobarbital, or phenytoin on cell death in the neonatal rat brain". J Pharmacol Exp Ther. 322 (2): 494–500. doi:10.1124/jpet.107.123133. PMID17483293. S2CID12741109.
21°12′16″B 99°27′51″T / 21,20444°B 99,46417°T / 21.20444; -99.46417 Khu truyền giáo của dòng Fran-xít ở Sierra GordaTrung tâm truyền giáo tại Santiago de JalpanVị tríSierra Gorda, Querétaro, MexicoTọa độ21°12′14″B 99°27′50″T / 21,204°B 99,464°T / 21.204; -99.464Xây dựngThế kỷ 16Xây dựng choDòng Fran-xítPhục hồi lại1990s Di sản thế giới UNESCOTên chính thức: Khu truyền gi
Конісі Юкінаґа Конісі Юкінаґа в Корейському Поході («Збірка портретів героїв минулого», Отіай Йосіїку, 1867) Період Адзуті-Момояма Народився 1555 (?), Кіото (?) Помер 6 листопада 1600, Кіото (45 років) Похований Хонмьодзі(префектура Кумамото)Сентодзі(префектура Ґіфу) Дитяче ім'я Якур
Віллі Бурместернім. Willy Burmester Основна інформаціяПовне ім'я нім. Carl Adolph Wilhelm BurmesterДата народження 16 березня 1869(1869-03-16)[1][2][…]Місце народження Гамбург, Північнонімецький союз[1][4]Дата смерті 16 січня 1933(1933-01-16)[1][2][…] (63 роки)Місце смерті Гамбург, Веймарськ
McCoy Tyner McCoy Tyner in 2010 Algemene informatie Volledige naam Alfred McCoy Tyner Geboren 11 december 1938 Geboorteplaats Philadelphia Overleden 6 maart 2020 Land Vlag van Verenigde Staten Verenigde Staten Werk Jaren actief 1960 - heden Genre(s) Jazz, mainstream jazz, hardbop, bebop, postbop Beroep Muzikant, componist, orkestleider Instrument(en) Piano Officiële website(en) AllMusic-profiel(en) Discogs-profiel(en) IMDb-profiel(en) MusicBrainz-profiel Portaal Muziek...
الخط 17 لمترو باريس Ligne 17 du métro de Paris معلومات عامة البلد فرنسا نوع مترو باريس نظام أوتوماتيكي مكان باريس - إيل دو فرانس - فرنسا نقطة البداية لو مونيل أملو نقطة النهاية سان دوني - بلايل عدد المحطات 9 التشغيل إفتتاح من 2023 إلى 2030 المالك نقابة النقل في إيل دو فرانس المشغ...
You can help expand this article with text translated from the corresponding article in French. (February 2016) Click [show] for important translation instructions. View a machine-translated version of the French article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikip...
Berikut ini adalah daftar pemenang penghargaan khusus dalam Miss World yang diantaranya adalah sejumlah pemenang kompetisi fast track (kompetisi khusus untuk mendapat tempat di 15/20 besar). Juga tercantum adalah wanita yang telah memenangkan gelar Penghargaan khusus Miss World dalam sepuluh tahun terakhir. Penghargaan saat ini Miss World Top Model Dimulai tahun 2004, tetapi tidak dianugerahkan pada tahun 2005 dan tahun 2006. Tahun Pemenang Mewakili Penempatan di MW 2004 Yessica Ramírez ...
Tarzan of the Apes Cartel de la película.Título Tarzán de los monosFicha técnicaDirección Scott SidneyAyudante de dirección Charles WattProducción William ParsonsGuion Edgar Rice Burroughs (novela) Fred Miller y Lois Weber (adaptación)Basada en Tarzán de los monos de Edgar Rice BurroughsMúsica Película mudaSonido Película mudaFotografía Enrique Juan VallejoMontaje Isadore BernsteinVestuario E. M. JahrhausProtagonistas Elmo Lincoln (Tarzán) Enid Markey George B. French Ver todos ...
Tecnológico Nacional de México campus Bahía de Banderas Lema Con Lealtad a México Trascender la Tecnología.Tipo PúblicaFundación 1 de agosto de 1993LocalizaciónDirección Crucero a Punta de Mita S/N C.P.63734La Cruz de Huanacaxtle, Nayarit, MéxicoCoordenadas 20°45′49″N 105°22′16″O / 20.76373889, -105.3712028AdministraciónRector Lic. Violeta Garnica RomeroFuncionarios Pendiente (2010)AcademiaEstudiantes 300 (2016)Mascota yuba (ballena yubarta )Sitio web [1]&...
British art historian SirRoy StrongCH, FRSLBorn (1935-08-23) 23 August 1935 (age 88)Winchmore Hill, Middlesex, EnglandAlma materQueen Mary's College, University of London (BA)Warburg Institute (PhD)OccupationArt historianSpouse Julia Trevelyan Oman (m. 1971; died 2003) Sir Roy Colin Strong, CH, FRSL (born 23 August 1935) is an English art historian, museum curator, writer, broadcaster and landscape designer. He has ...
Fictional monster in Dungeons & Dragons BeholderTom Wham's illustration of a beholder from the Advanced Dungeons & Dragons Monster Manual, 1977First appearanceGreyhawk (1975)In-universe informationTypeAberrationAlignmentLawful Evil The beholder is a fictional monster in the Dungeons & Dragons fantasy role-playing game. It is depicted as a floating orb of flesh with a large mouth, single central eye, and many smaller eyestalks on top with powerful magical abilities. The beholder is...
Pardoning in 2001 of 450 individualsThis article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Bill Clinton pardon controversy – news · newspapers · books · scholar · JSTOR (April 2021) (Learn how and when to remove this template message) This article is part of a series aboutBill Clinton Political positions Electoral ...
Sporting event delegationSudan at the2023 World Aquatics ChampionshipsFlag of SudanFINA codeSUDNational federationSudan Amateur Swimming Associationin Fukuoka, JapanCompetitors2 in 1 sportMedals Gold 0 Silver 0 Bronze 0 Total 0 World Aquatics Championships appearances197319751978198219861991199419982001200320052007200920112013201520172019202220232024 Sudan is set to compete at the 2023 World Aquatics Championships in Fukuoka, Japan from 14 to 30 July. Swimming Main article: Swimming at the 20...
Katie Kubert at the Marvel: Next Big Thing panel on Saturday, June 14, 2014, Day 1 of the Special Edition NYC convention in Manhattan Katie Kubert is an American comic book editor. She is known for her work at DC Comics, where she supervised the reinvention of the Batgirl comics.[1] Early life Katie Kubert graduated from Boston University in 2006 with a Bachelors of Science in Film/Cinema/Video Studies and Art History.[2] Kubert is the granddaughter of comic book artist Joe Ku...
South Korean TV series or program We Will Eat WellPromotional posterAlso known asGirls Who Eat WellGenreVarietyPresented by Moon Hee-joon Jo Se-ho Yang Se-hyung Country of originSouth KoreaOriginal languageKoreanNo. of seasons1No. of episodes26ProductionProduction locationsSeoul, South KoreaProduction companyGO ProductionOriginal releaseNetworkJTBCReleaseJune 29, 2016 (2016-06-29) –February 2, 2017 (2017-02-02) Korean nameHangul잘 먹겠습니다Revised RomanizationJal ...
American judge C. Arlen BeamSenior Judge of the United States Court of Appeals for the Eighth CircuitIncumbentAssumed office February 1, 2001Judge of the United States Court of Appeals for the Eighth CircuitIn officeNovember 9, 1987 – February 1, 2001Appointed byRonald ReaganPreceded byDonald Roe RossSucceeded byWilliam J. RileyChief Judge of the United States District Court for the District of NebraskaIn office1986–1987Preceded byWarren Keith UrbomSucceeded byLyle Elmer Stro...
The angular aperture of a thin lens with focal point at F and an aperture of diameter D {\displaystyle D} . The angular aperture of a lens is the angular size of the lens aperture as seen from the focal point: a = 2 arctan ( D / 2 f ) = 2 arctan ( D 2 f ) {\displaystyle a=2\arctan \left({\frac {D/2}{f}}\right)=2\arctan \left({\frac {D}{2f}}\right)} where f {\displaystyle f} is the focal length D {\displaystyle D} is the diameter of the aperture. Relation to numerical apertur...
Asafa Powell Asafa Powell a Doha nel 2012 Nazionalità Giamaica Altezza 188 cm Peso 87 kg Atletica leggera Specialità Velocità Società MVP Track & Field Club Termine carriera 27 novembre 2022 Record 50 m 564 (indoor - 2012) 60 m 644 (indoor - 2016) 100 y 907 (2010) 100 m 972 (2008) 200 m 1990 (2006) 400 m 4594 (2009) Carriera Nazionale 2002- Giamaica Palmarès Competizione Ori Argenti Bronzi Giochi olimpici 1 0 0 Mondiali 2 1 2 Mondiali indoor 0 1 0 Giochi del Commonwealth 2 1 0 ...
Questa voce sugli argomenti battaglie e guerre napoleoniche è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti dei progetti di riferimento 1, 2. Prima battaglia di Zurigoparte della guerra della Seconda CoalizionePanorama di Zurigo sul fiume LimmatData4 - 7 giugno 1799 LuogoZurigo EsitoVittoria austriaca Modifiche territorialiL'Austria acquisisce la città di Zurigo Schieramenti Francia Austria ComandantiAndrea MassenaCarlo d'As...