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Metformi n tabletirovannoe saharosnizhayushee lekarstvennoe sredstvo klassa biguanidov dlya priyoma vnutr Primenyaetsya pri lechenii saharnogo diabeta 2 go tipa osobenno u lic s izbytochnym vesom i ozhireniem i pri etom sohranyonnoj normalnoj funkciej pochek Provodyatsya issledovaniya po primeneniyu metformina pri gestacionnom diabete i sindrome polikistoznyh yaichnikov Preparat issledovan i dlya drugih zabolevanij pri kotoryh rezistentnost k insulinu mozhet byt vazhnym faktorom MetforminMetforminHimicheskoe soedinenieIYuPAK N N dimetilimiddikarboimid diamid i v vide gidrohlorida Brutto formula C4H11N5Molyarnaya massa 129 164 g mol 165 63 g mol HCl CAS 657 24 9PubChem 4091DrugBank APRD01099SostavKlassifikaciyaFarmakol gruppa Gipoglikemicheskie sinteticheskie i drugie sredstvaATH A10BA02MKB 10 E11FarmakokinetikaBiodostupn 50 60 Period poluvyved 6 2 ch Ekskreciya pochkamiLekarstvennye formyTabletki tabletki pokrytye obolochkoj tabletki prolongirovannogo dejstviya pokrytye obolochkoj Sposoby vvedeniyaPeroralnoDrugie nazvaniyaBagomet Glikon Gliformin Glyukofazh Glyukofazh long Metfogamma Metformin Metformin BMS Siofor Formin Pliva Mediafajly na Vikisklade Pri pravilnom naznachenii metformin vyzyvaet malo pobochnyh effektov sredi kotoryh chashe voznikayut zheludochno kishechnye rasstrojstva i svyazan s nizkim riskom gipoglikemii Laktoacidoz nakoplenie molochnoj kisloty v krovi mozhet byt seryoznoj problemoj pri peredozirovke i pri naznachenii lyudyam s protivopokazaniyami no v ostalnom znachitelnogo riska net Metformin sposobstvuet snizheniyu urovnya holesterina LPNP i trigliceridov i ne vyzyvaet uvelicheniya massy tela Odin iz naibolee znachimyh effektov Metformina dostovernoe snizhenie smertnosti ot oslozhnenij serdechno sosudistyh zabolevanij pri saharnom diabete Vhodit v spisok vazhnejshih lekarstvennyh preparatov Vsemirnoj organizacii zdravoohraneniya naryadu s drugim peroralnym antidiabeticheskim preparatom glibenklamidom Metformin primenyaetsya v forme gidrohlorida IstoriyaMetformin vpervye byl opisan v nauchnoj literature v 1922 godu Emilem Vernerom i Dzhejmsom Bellom kak produkt v sinteze N N dimetilguanidina V 1929 godu Slotta i Cheshe obnaruzhili ego saharosnizhayushee dejstvie u krolikov otmetiv chto on byl samym silnym iz biguanidov kotorye oni izuchali Eti rezultaty byli zabyty kak i raboty nad drugimi analogami guanidina takimi kak na fone populyarnosti insulina Interes k metforminu odnako vernulsya v konce 1940 h godov V 1950 godu bylo obnaruzheno chto metformin v otlichie ot nekotoryh drugih podobnyh soedinenij ne snizhaet arterialnoe davlenie i chastotu serdechnyh sokrashenij u zhivotnyh V etom zhe godu filippinskij vrach Eusebio Garsiya primenyal metformin kotoryj nazyval flyuamin dlya lecheniya grippa On zametil chto preparat snizhaet uroven sahara v krovi do minimalnogo fiziologicheskogo urovnya pri lechenii pacientov i byl netoksichen Garsiya takzhe schital chto metformin obladaet bakteriostaticheskim protivovirusnym protivomalyarijnym antipireticheskim i obezbolivayushim effektami V serii statej v 1954 godu polskij farmakolog Yanush Supnevskij ne smog podtverdit bolshinstvo iz etih effektov v tom chisle snizhenie urovnya sahara v krovi no nablyudal nekotorye antivirusnye effekty u cheloveka Galega officinalis estestvennyj istochnik galegina V bolnice Salpetrier francuzskij diabetolog Zhan Stern izuchal saharosnizhayushie svojstva galegina alkaloid vydelennyj iz kozlyatnika aptechnogo strukturno svyazannogo s metforminom i nablyudal za kratkosrochnym ego ispolzovaniem v kachestve antidiabeticheskogo sredstva do togo kak byli razrabotany sintaliny Pozdnee rabotaya v laboratoriyah Aron v Parizhe on povtorno issledoval saharosnizhayushuyu aktivnost metformina i neskolkih analogichnyh biguanidov Stern byl pervym kto popytalsya primenit metformin dlya lecheniya saharnogo diabeta u cheloveka on pridumal nazvanie Glyukofazh fr Glucophage pozhiratel glyukozy dlya etogo preparata i opublikoval svoi rezultaty v 1957 godu Metformin stal dostupen v v 1958 godu i nachal vpervye prodavatsya v Velikobritanii Shirokij interes k metforminu vozrodilsya tolko posle vyvoda iz lekarstvennogo oborota drugih biguanidov v 1970 h godah Metformin byl odobren v Kanade v 1972 godu a v SShA on byl odobren FDA dlya lecheniya saharnogo diabeta 2 tipa tolko v 1994 godu Proizvedyonnyj po licenzii kompaniej Bristol Myers Squibb Glyukofazh byl pervym torgovym nazvaniem metformina dlya prodazhi v SShA nachinaya s 3 marta 1995 goda Dzheneriki teper dostupny v neskolkih stranah i metformin kak polagayut stal naibolee chasto vypisyvaemym antidiabeticheskim preparatom v mire V XXI veke metformin rassmatrivaetsya entuziastami kak potencialnyj preparat dlya prodleniya aktivnoj zhizni cheloveka V eksperimentah na modelnyh zhivotnyh uchyonye pokazali chto upotreblenie metformina prodlyaet im zhizn V 2020 h angl angl American Federation for Aging Research planiruet issledovat metformin na pozhilyh lyudyah s kraudfandingovym finansirovaniem poskolku ni u gosudarstvennyh sluzhb ni u krupnyh farmkompanij net interesa k takomu issledovaniyu Poluchenie i svojstva veshestvaStandartnyj sintez metformina byl vpervye opisan v 1922 godu On obrazuetsya vo vremya reakcii gidrohlorida dimetilamina c diciandiamid pri nagrevanii V sootvetstvii s proceduroj opisannoj v 1975 godu v patente Aron i Enciklopedii farmacevticheskogo proizvodstva angl Pharmaceutical Manufacturing Encyclopedia ekvimolyarnoe kolichestvo dimetilamina i 2 cianoguanidina rastvoryayut v toluole s ohlazhdeniem dlya dostizheniya koncentrirovannogo rastvora a zatem medlenno dobavlyayut ekvimolyarnoe kolichestvo hloristogo vodoroda Smes nachinaet kipet sama po sebe i posle ohlazhdeniya obrazuetsya osadok gidrohlorida metformina s 96 vyhodom Do 2005 goda ne bylo tochnyh dannyh ob elektronnoj strukture metformina kak i ostalnyh proizvodnyh angl Uchyonye tolko predpolagali chto metformin nahoditsya v protonirovannoj tautomernoj forme i v 2005 godu bylo provedeno utochnyayushee issledovanie Raznica mezhdu rasschitannymi energiyami u nastoyashej tautomernoj forme metformina i po ranee sushestvovavshemu predstavleniyu o nej sostavila okolo 9 kkal mol V 2009 godu byla utochnena struktura gidrohlorida metformina V 2008 godu bylo opublikovano opisanie uluchshennogo metoda sinteza gidrohlorida metformina ekologicheski chistyj metod s ispolzovaniem tolko neskolkih milligramm reagentov i neskolkih kapel rastvoritelya kotoryj vklyuchaet pyatiminutnuyu reakciyu v sverhvysokochastotnyh volnah FarmakologiyaFarmakodinamika Metformin snizhaet koncentraciyu glyukozy v krovi putyom ugneteniya obrazovaniya glyukozy glyukoneogeneza v pecheni U bolnogo saharnym diabetom 2 tipa skorost glyukoneogeneza v 3 raza vyshe ot normy Metformin snizhaet etot pokazatel bolee chem na odnu tret Metformin aktiviziruet AMF aktiviruemuyu proteinkinazu AMFK ferment pecheni kotoryj igraet vazhnuyu rol v insulinovoj signalizacii vo vsyom energeticheskom balanse organizma i metabolizme glyukozy i zhirov Aktivaciya AMFK neobhodima dlya ingibiruyushego effekta metformina na glyukoneogenez v pecheni V issledovanii opublikovannom v 2008 godu mehanizm dejstviya metformina byl opisan bolee podrobno Ono pokazalo chto aktivaciya AMFK neobhodima dlya uvelicheniya ekspressii belka SHP angl Small heterodimer partner kotoryj v svoyu ochered podavlyaet ekspressiyu i uchastvuyushih v glyukoneogeneze Metformin chasto primenyayut v issledovaniyah AICA angl aminoimidazole carboxamide ribonukleotida kak agonista AMFK Mehanizm posredstvom kotorogo biguanidy aktiviruyut AMFK ostayotsya neponyatnym odnako issledovaniya pokazyvayut chto metformin uvelichivaet kolichestvo citozolnogo AMF Pokazano chto metformin obladaet umerennym ingibitornym effektom dyhatelnogo kompleksa I po vidimomu dannoe svojstvo preparata lezhit v osnove mehanizma ego dejstviya V dopolnenie k podavleniyu glyukoneogeneza v pecheni metformin uvelichivaet chuvstvitelnost tkanej k insulinu usilivaet perifericheskij zahvat glyukozy putyom fosforilirovaniya transportera GLUT4 povyshaet okislenie zhirnyh kislot i umenshaet vsasyvanie glyukozy iz zheludochno kishechnogo trakta Uvelichenie perifericheskoj utilizacii glyukozy mozhet byt svyazano s uluchsheniem svyazyvaniya insulina s receptorami insulina AMFK veroyatno takzhe igraet v etom rol tak kak naznachenie metformina uvelichivaet aktivnost AMFK v skeletnyh myshcah AMFK kak izvestno vyzyvaet vstraivanie GLUT4 v plazmaticheskuyu membranu v rezultate chego proishodit insulin nezavisimoe pogloshenie glyukozy Nekotorye metabolicheskie effekty metformina po vsej vidimosti proishodyat po AMFK nezavisimym mehanizmam issledovanie v 2008 godu pokazalo chto metabolicheskie effekty metformina v serdechnoj myshce mogut voznikat nezavisimo ot izmenenij aktivnosti AMFK i mogut byt oposredovany p38 MARK angl p38 mitogen activated protein kinases i RKS zavisimymi mehanizmami Preparat snizhaet koncentraciyu v syvorotke krovi TG holesterina i LPNP opredelyaemyh i ne izmenyaet koncentraciyu lipoproteinov drugih plotnostej Stabiliziruet ili snizhaet massu tela Pri otsutstvii v krovi insulina terapevticheskij effekt ne proyavlyaetsya Gipoglikemicheskih reakcij ne vyzyvaet Uluchshaet za schyot podavleniya ingibitora aktivatora profibrinolizina plazminogena tkanevogo tipa S pomoshyu terapii metforminom mozhno dobitsya snizheniya urovnya glyukozy na 20 a soderzhanie glikozilirovannogo gemoglobina na 1 5 Monoterapiya metforminom po sravneniyu s drugimi sredstvami dlya snizheniya koncentracii glyukozy v krovi pioglitazonom akarbozoj preparatami a takzhe po sravneniyu s dietoj insulinom ili placebo snizhaet risk razvitiya infarkta miokarda a takzhe snizhaet obshuyu smertnost v populyacii lic s saharnym diabetom vtorogo tipa insulinnezavisimogo chto bylo prodemonstrirovano v sistematicheskom obzore 29 klinicheskih issledovanij opublikovannom v biblioteke Kohrejna Cochrane Collaboration v 2005 godu istochnik sekciya o metformine Farmakokinetika Absolyutnaya biodostupnost natoshak sostavlyaet 50 60 priyom s pishej snizhaet Cmax na 40 i zamedlyaet eyo dostizhenie na 35 min Pik koncentracii v plazme S max dostigaetsya v techenie odnogo tryoh chasov 1 81 2 69 ch s nemedlennym vysvobozhdeniem metformina i ot chetyryoh do vosmi chasov s formoj angl Svyazyvanie metformina s belkami plazmy neznachitelno o chyom svidetelstvuet ochen vysokij obyom raspredeleniya 654 358 l posle odnokratnoj dozy 850 mg Stabilnyj effekt obychno dostigaetsya cherez odin ili dva dnya Metformin ne metaboliziruetsya On vyvoditsya iz organizma s mochoj v neizmennom vide putyom kanalcevoj sekrecii metformin ne obnaruzhivaetsya v plazme krovi v techenie 24 chasov posle odnokratnogo priyoma Srednij period poluvyvedeniya v plazme krovi sostavlyaet 6 2 chasa nachalnyj T1 2 ot 1 7 do 3 ch okonchatelnyj ot 9 do 17 ch Metformin raspredelyaetsya i vozmozhno nakaplivaetsya v eritrocitah s gorazdo bo lshim periodom poluvyvedeniya 17 6 ch soobshaetsya o znacheniyah v predelah 18 5 31 5 chasov pri odnodozovom izuchenii lic ne stradayushih saharnym diabetom Absorbciya 48 52 Bystro vsasyvaetsya v zheludochno kishechnom trakte Koncentraciya v plazme ne prevyshaet 1 mkg ml v techenie 24 48 ch PokazaniyaLechenie saharnogo diabeta Osnovnoe naznachenie metformina lechenie saharnogo diabeta 2 tipa osobenno lyudej s izbytochnym vesom V etoj gruppe bolee 10 let lecheniya metformin snizhal risk oslozhnenij saharnogo diabeta i smertnost v celom primerno na 30 po sravneniyu s insulinom i preparatami sulfonilmocheviny glibenklamid i i primerno na 40 po sravneniyu s gruppoj poluchavshej tolko rekomendacii po diete Eti razlichiya sohranyayutsya u pacientov kotorye nablyudalis v techenie 5 10 let posle issledovaniya Tak kak intensivnyj kontrol glyukozy v krovi s primeneniem metformina umenshaet risk diabet svyazannyh konechnyh tochek u bolnyh saharnym diabetom s izbytochnoj massoj tela i eto svyazano s menshim naborom vesa i menshimi gipoglikemicheskimi pristupami chem v gruppe poluchavshej insulin i preparaty sulfonilmocheviny metformin mozhet byt preparatom vybora u takih pacientov Metformin imeet bolee nizkij risk gipoglikemii chem preparaty sulfonilmocheviny hotya ona inogda voznikaet vo vremya intensivnyh fizicheskih nagruzok deficita kalorij ili pri ispolzovanii s drugimi saharosnizhayushimi preparatami Metformin takzhe ne svyazan s uvelicheniem vesa i umerenno umenshaet uroven LPNP i trigliceridov Krome togo mozhet primenyatsya v kompleksnoj terapii s drugimi preparatami pri lechenii ozhireniya Eksperimentalnye pokazaniya Metformin vsyo chashe ispolzuyut pri lechenii sindroma polikistoznyh yaichnikov SPKYa nealkogolnyh zhirovyh boleznej pecheni i prezhdevremennom polovom sozrevanii pri drugih zabolevaniyah kotorye proyavlyayutsya rezistentnostyu k insulinu Eti pokazaniya eshyo schitayutsya eksperimentalnymi Preimushestvo metformina pri nealkogolnyh zhirovyh boleznyah pecheni ne bylo shiroko izucheno hotya nekotorye randomizirovannye kontroliruemye ispytaniya obnaruzhili znachitelnoe uluchshenie pri ego ispolzovanii dokazatelstv po prezhnemu nedostatochno Prediabet Lechenie metforminom lyudej imeyushih risk razvitiya saharnogo diabeta 2 tipa mozhet umenshit veroyatnost razvitiya bolezni hotya intensivnye fizicheskie uprazhneniya i korrekciya diety znachitelno luchshe podhodyat dlya etoj celi V krupnom issledovanii SShA izvestnom kak Programma po profilaktike saharnogo diabeta uchastniki byli razdeleny na gruppy Odna gruppa poluchala placebo drugaya metformin a tretya rekomendacii po izmeneniyu obraza zhizni vse tri nablyudalis v srednem v techenie tryoh let Intensivnaya programma po izmeneniyu obraza zhizni vklyuchala 16 urokov po diete i fizicheskim uprazhneniyam pacientam byla postavlena cel snizheniya massy tela na 7 i fizicheskaya aktivnost ne menee 150 minut v nedelyu Zabolevaemost saharnym diabetom byla na 58 nizhe v gruppe s modifikaciej obraza zhizni i na 31 v gruppe poluchavshej metformin Sredi molodyh lyudej s bolee vysokim indeksom massy tela izmenenie obraza zhizni ne bylo bolee effektivnym chem primenenie metformina a dlya pozhilyh lyudej s nizkim indeksom massy tela metformin byl ne luchshe chem placebo v profilaktike saharnogo diabeta Posle desyati let zabolevaemost saharnym diabetom byla na 34 nizhe v gruppe s modifikaciej obraza zhizni i na 18 nizhe v gruppe poluchavshej metformin Neyasno zamedlyal li metformin progressirovanie prediabeta v saharnyj diabet istinnyj profilakticheskij effekt ili zhe snizhenie riska razvitiya saharnogo diabeta bylo prosto iz za ego saharosnizhayushego dejstviya lechebnyj effekt Sindrom polikistoznyh yaichnikov Antidiabeticheskaya terapiya byla predlozhena s konca 1980 h godov v kachestve lecheniya sindroma polikistoznyh yaichnikov SPKYa pri kotorom chasto voznikaet rezistentnost k insulinu O primenenii metformina pri SPKYa vpervye soobshalos v 1994 godu v nebolshom issledovanii provedyonnom v Andskom universitete Venesuela Nacionalnyj institut zdorovya Velikobritanii v 2004 godu rekomendoval zhenshinam s SPKYa i indeksom massy tela vyshe 25 naznachat metformin dlya lecheniya anovulyacii i besplodiya kogda drugie metody lecheniya ne prinesli polozhitelnyh rezultatov Odnako dva krupnyh klinicheskih issledovaniya provedyonnye v 2006 2007 godah poluchili v osnovnom otricatelnye rezultaty primenenie metformina pri SPKYa ne effektivnee placebo i kombinaciya metformina i klomifena ne effektivnee chem monoterapiya klomifenom Uchityvaya eto v posleduyushih obzorah bylo otmecheno chto krupnye randomizirovannye kontroliruemye issledovaniya v celom ne podtverdili perspektivnost takoj terapii predlozhennoj v rannih nebolshih issledovaniyah Mezhdunarodnye rukovodstva po klinicheskoj praktike ne rekomenduyut metformin v kachestve pervoj linii lecheniya SPKYa ili voobshe ne rekomenduyut za isklyucheniem zhenshin s narusheniem tolerantnosti k glyukoze Rukovodstva predlagayut klomifen kak preparat pervoj linii i podchyorkivayut vazhnost izmeneniya obraza zhizni nezavisimo ot medikamentoznogo lecheniya Po drugomu mneniyu sistematicheskij obzor chetyryoh sravnitelnyh ispytanij metformina i klomifena pokazal ih odinakovuyu effektivnost dlya lecheniya besplodiya Redakcionnyj sovet BMJ otmetil chto chetyre issledovaniya pokazali polozhitelnye rezultaty primeneniya metformina u pacientok u kotoryh klomifen byl neeffektiven i predlozhil ispolzovat metformin v kachestve preparata vtoroj linii kogda lechenie klomifenom neeffektivno V drugom obzore rekomendovan metformin kak preparat pervoj linii potomu chto on okazyvaet polozhitelnoe vliyanie ne tolko na anovulyaciyu no i na rezistentnost k insulinu girsutizm i ozhirenie kotorye chasto svyazany s SPKYa Bolshoj obzor Cochrane Collaboration 27 randomizirovannyh klinicheskih ispytanij ustanovil chto metformin uluchshaet ovulyaciyu i nastuplenie beremennosti osobenno v sochetanii s klomifenom no eto ne svyazano s uvelicheniem chisla zhivorozhdyonnyh Rezultaty poslednih issledovanij pokazali chto priem metformina mozhet snizhat veroyatnost prezhdevremennyh rodov i pozdnego samoproizvolnogo aborta u pacientok s sindromom polikistoznyh yaichnikov no pri etom preparat ne otrazhaetsya na riske razvitiya gestacionnogo diabeta V hode ispytanij bylo vyyavleno chto risk pozdnego samoproizvolnogo aborta vo vtorom trimestre beremennosti i prezhdevremennyh rodov do 37 j nedeli primerno v dva raza nizhe u pacientok poluchavshih metformin Tolko 9 zhenshinam 5 iz 211 zavershivshih klinicheskie issledovaniya v metforminovoj gruppe ne udalos vynosit beremennost V kontrolnoj gruppe etot pokazatel sostavil 10 23 uchastnicy iz 223 chelovek Vsego v issledovanii byli zadejstvovany 487 pacientok Gestacionnyj diabet Neskolko obzornyh i randomizirovannyh kontroliruemyh issledovanij pokazali chto metformin stol zhe effektiven i bezopasen kak i insulin dlya lecheniya gestacionnogo diabeta i v nebolshih issledovaniyah po tipu sluchaj kontrol prishli k mneniyu chto deti materej poluchavshih metformin vmesto insulina mogut byt zdorovee v neonatalnom periode Tem ne menee nekotorye problemy byli podnyaty v otnoshenii issledovanij opublikovannyh do sih por i dokazatelstva dolgosrochnoj bezopasnosti metformina dlya materi i rebyonka po prezhnemu otsutstvuyut Issledovatelskie nahodki Krupnoe issledovanie po tipu sluchaj kontrol provedyonnoe v MD Anderson Cancer Center pokazalo chto metformin mozhet zashitit ot raka podzheludochnoj zhelezy Risk raka podzheludochnoj zhelezy u ispytuemyh prinimavshih metformin okazalsya na 62 nizhe chem u uchastnikov issledovaniya kotorye ne prinimali ego a u ispytuemyh kotorye poluchali insulin ili preparaty sulfonilmocheviny bylo obnaruzheno povyshenie v 5 raz i 2 5 raza riska razvitiya raka podzheludochnoj zhelezy sootvetstvenno po sravneniyu s uchastnikami kotorye nichego ne poluchali Issledovanie imelo nekotorye ogranicheniya odnako i prichina etogo snizheniya riska poka neyasna Nablyudatelnye issledovaniya provedyonnye v Universitete Dandi pokazali snizhenie na 25 37 sluchaev zabolevaniya rakom u diabetikov prinimavshih metformin Neskolko epidemiologicheskih i sluchaj kontrol issledovanij pokazali chto diabetiki primenyayushie metformin mogut imet risk razvitiya raka nizhe po sravneniyu s temi kto ispolzuet drugie saharosnizhayushie preparaty Prichiny etogo yavleniya ostayutsya neyasnymi i rezultaty trebuyut podtverzhdeniya v kontroliruemyh issledovaniyah Odno randomizirovannoe kontroliruemoe issledovanie pokazalo chto metformin mozhet umenshit nabor vesa u pacientov prinimayushih atipichnye antipsihoticheskie preparaty osobenno v sochetanii s izmeneniem obraza zhizni obuchenie dieta i uprazhneniya V eksperimente Nacionalnogo instituta izucheniya problem stareniya prodolzhitelnost zhizni myshej poluchavshih metformin v otnositelno nizkoj dozirovke vyrosla na 5 83 po sravneniyu s obychnoj pri etom nachalo vozrastnyh zabolevanij bylo otsrocheno V to zhe vremya bolee vysokie dozy okazalis toksichnymi i prodolzhitelnost zhizni poluchavshih ih myshej byla nevysoka Metformin vozdejstvuet srazu na neskolko mehanizmov stareniya vklyuchaya usilenie autofagii aktivaciyu sensora nehvatki pitatelnyh veshestv AMPK ingibiruet mitohondrialnoe dyhanie oslablyaet kletochnoe starenie adipocitov podavlyaet vospalenie i privodit k blagopriyatnomu sdvigu v strukture kishechnogo mikrobioma ProtivopokazaniyaMetformin protivopokazan lyudyam s lyubymi sostoyaniyami kotorye mogut uvelichit risk razvitiya laktatacidoza vklyuchaya zabolevaniya pochek uroven kreatinina bolee 150 mkmol l 1 7 mg dl hotya eto uslovnaya granica lyogkih i pecheni alkogolizm Po informacii proizvoditelej serdechnaya nedostatochnost v chastnosti nestabilnaya ili ostraya zastojnaya serdechnaya nedostatochnost uvelichivaet risk laktatacidoza pri ispolzovanii metformina Odnako sistematicheskij obzor kontroliruemyh klinicheskih issledovanij v 2007 godu pokazal chto metformin edinstvennyj antidiabeticheskij preparat bezvrednyj dlya lyudej s serdechnoj nedostatochnostyu i chto on mozhet umenshit smertnost po sravneniyu s drugimi antidiabeticheskimi sredstvami Rekomenduetsya vremenno otmenyat metformin za dvoe sutok pered lyubym radiograficheskim issledovaniem s vvedeniem jodirovannogo kontrasta naprimer pri KT ili angiografii s kontrastnym usileniem tak kak kontrastnoe veshestvo mozhet vremenno snizhat funkciyu pochek oposredovanno privodya k laktatacidozu i vyzyvaya zaderzhku metformina v organizme Rekomenduyut vozobnovlyat priyom metformina tolko cherez dvoe sutok kogda proishodit vosstanovlenie funkcii pochek Takzhe protivopokazaniya giperchuvstvitelnost giperglikemicheskaya koma ketoacidoz ostryj infarkt miokarda degidrataciya gipokalorijnaya dieta menee 1 000 kkal sut laktatacidoz v tom chisle v anamneze beremennost period laktacii C ostorozhnostyu Vozrast starshe 60 let vypolnenie tyazhyoloj fizicheskoj raboty povyshennaya opasnost razvitiya laktatacidoza Pobochnye effektyZheludochno kishechnye Naibolee rasprostranyonnye pobochnye effekty metformina zheludochno kishechnye rasstrojstva v tom chisle metallicheskij privkus vo rtu snizhenie appetita diareya kishechnye koliki toshnota rvota i meteorizm metformin chashe associiruetsya s zheludochno kishechnymi pobochnymi effektami chem bolshinstvo drugih antidiabeticheskih preparatov V klinicheskom issledovanii v kotorom prinyalo uchastie 286 pacientov 53 2 iz 141 uchastnika kotorye poluchali metformin nemedlennogo vysvobozhdeniya soobshali o vozniknovenii diarei po sravneniyu s 11 7 v gruppe poluchavshej placebo i 25 5 soobshali o vozniknovenii toshnoty rvoty po sravneniyu s 8 3 v gruppe placebo Zheludochno kishechnoe rasstrojstvo mozhet vyzvat silnyj diskomfort dlya pacienta ono voznikaet chashe pri pervom naznachenii metformina ili pri uvelichenii dozy Diskomfort chasto mozhno izbezhat nachinaya s nizkoj dozy 1 1 7 g v sutki i postepenno uvelichivaya dozu Zheludochno kishechnye rasstrojstva posle dlitelnogo postoyannogo ispolzovaniya voznikayut rezhe Dlitelnoe primenenie metformina bylo svyazano s povysheniem urovnya gomocisteina i narusheniem vsasyvaniya vitamina B12 Vysokie dozy i dlitelnoe primenenie svyazany s povysheniem zabolevaemosti nedostatochnostyu vitamina B12 i nekotorye issledovateli rekomenduyut rannee vyyavlenie i profilaktiku takih sostoyanij Laktatacidoz Laktatacidoz naibolee tyazhyolyj pobochnyj effekt pri primenenii biguanidov drugoj biguanid byl otozvan s farmakologicheskogo rynka iz za vysokogo riska razvitiya laktatacidoza 40 64 sluchaya na million cheloveko let Odnako metformin bezopasnee chem fenformin Dannoe oslozhnenie pri primenenii metformina vstrechaetsya ochen redko i podavlyayushee bolshinstvo takih sluchaev svyazano s soputstvuyushimi sostoyaniyami takimi kak narusheniya funkcii pecheni ili pochek Pogloshenie laktata pechenyu umenshaetsya pri primenenii metformina potomu chto laktat yavlyaetsya substratom dlya pechyonochnogo glyukoneogeneza process kotoryj ingibiruet metformin U zdorovyh lic etot nebolshoj izbytok prosto udalyaetsya s pomoshyu drugih mehanizmov v tom chisle pogloshenie pochkami kogda ih funkciya ne narushena i proishodit neznachitelnoe povyshenie urovnya laktata v krovi Odnako pri narushennoj funkcii pochek udalenie metformina i laktata snizhaetsya chto privodit k povysheniyu ih urovnya v krovi i v itoge vyzyvaet laktatacidoz za schyot nakopleniya molochnoj kisloty Poskolku metformin snizhaet pogloshenie pechenyu laktata lyuboe sostoyanie kotoroe mozhet vyzvat laktatacidoz yavlyaetsya protivopokazaniem k ego ispolzovaniyu Naibolee chastye prichiny povyshennogo obrazovaniya molochnoj kisloty alkogolizm iz za istosheniya zapasov NAD serdechnaya nedostatochnost i zabolevaniya dyhatelnyh putej iz za nedostatochnoj oksigenacii tkanej zabolevaniya pochek naibolee chastaya prichina narusheniya ekskrecii molochnoj kisloty Krome togo predpolagayut chto metformin uvelichivaet obrazovanie laktata v tonkoj kishke potencialno eto mozhet sposobstvovat razvitiyu laktatacidoza u bolnyh s faktorami riska Odnako klinicheskoe znachenie etogo yavleniya neizvestno i risk razvitiya metformin svyazannogo laktatacidoza chashe vsego obyasnyaetsya snizheniem pechyonochnoj poglosheniya a ne uvelicheniem obrazovaniya v tonkoj kishke Drugie pobochnye effekty Takzhe obnaruzheno chto metformin snizhaet uroven tireotropnogo gormona v krovi u bolnyh s gipotireozom a u muzhchin snizhaet uroven testosterona Klinicheskoe znachenie etih izmenenij do sih por neizvestno Pri allergii na preparat vozmozhna kozhnaya syp V edinichnyh sluchayah razvivaetsya megaloblastnaya anemiya V sluchayah vozniknoveniya pobochnyh effektov dozu sleduet umenshit ili otmenit priyom preparata Vzaimodejstvie Blokator H2 gistaminovyh receptorov cimetidin privodit k uvelicheniyu v plazme koncentracii metformina za schyot sokrasheniya vyvedeniya ego iz organizma pochkami tak kak metformin i cimetidin vyvodyatsya iz organizma putyom kanalcevoj sekrecii to v chastnosti kationnaya polozhitelno zaryazhennaya forma cimetidina mozhet konkurirovat s metforminom za odin i tot zhe mehanizm transporta Nebolshoe dvojnoe slepoe randomizirovannoe issledovanie pokazalo chto cefaleksin takzhe uvelichivaet koncentraciyu metformina po takomu zhe mehanizmu Teoreticheski lyuboj drugoj kationnyj preparat digoksin morfin prokainamid hinidin hinin ranitidin i vankomicin mozhet privesti k podobnomu effektu Nesovmestim s etanolom laktatacidoz S ostorozhnostyu naznachayut v sochetanii s nepryamymi antikoagulyantami Proizvodnye sulfonilmocheviny insulin akarboza ingibitory MAO ingibitory APF ciklofosfamid i salicilaty usilivayut dejstvie Pri odnovremennom primenenii s GKS gormonalnymi kontraceptivami dlya priyoma vnutr epinefrinom glyukagonom gormonami shitovidnoj zhelezy proizvodnymi fenotiazina tiazidnymi diuretikami proizvodnymi nikotinovoj kisloty vozmozhno umenshenie gipoglikemicheskogo dejstviya metformina Nifedipin povyshaet absorbciyu Cmax zamedlyaet vyvedenie Rezhim dozirovaniyaTabletki metformina 500 mg prodayushiesya v Velikobritanii Vnutr vo vremya ili neposredstvenno posle edy pacientam ne poluchayushim insulin po 1 g 2 tabletki 2 raza v den v pervye 3 dnya ili po 500 mg 3 raza v den v posleduyushem s 4 po 14 den po 1 g 3 raza v den cherez 15 dnej dozirovku mozhno umenshit s uchyotom soderzhaniya glyukozy v krovi i moche Podderzhivayushaya sutochnaya doza 1 2 g Tabletki 850 mg prinimayut po 1 utrom i vecherom Maksimalnaya sutochnaya doza 3 g Pri odnovremennom primenenii insulina v doze menee 40 ED sut rezhim dozirovaniya metformina tot zhe pri etom dozu insulina mozhno postepenno snizhat na 4 8 ED sut cherez den Pri doze insulina bolee 40 ED sut primenenie metformina i snizhenie dozy insulina trebuyut bolshoj ostorozhnosti i provodyatsya v stacionare Peredozirovka Obzor soobshenij v techenie pyati let ob umyshlennyh i sluchajnyh peredozirovkah metforminom pokazal chto sluchai seryoznyh pobochnyh yavlenij byli redki hotya u pozhilyh pacientov risk byl vyshe Analogichnoe issledovanie gde zaregistrirovannye sluchai peredozirovki analizirovalis v centre kontrolya za yadami Tehasa v period s 2000 po 2006 god ustanovilo chto priyom dozy bolee 5 g chasto vyzyval seryoznye medicinskie posledstviya u vzroslyh V medicinskoj literature zaregistrirovany sluchai vyzhivaemosti posle prednamerennoj peredozirovki do 63 g metformina Smertelnye ishody peredozirovki redki no sluchayutsya U zdorovyh detej dozy menee 1 700 mg ne vyzyvayut znachitelnye toksicheskie effekty Naibolee rasprostranyonnye simptomy peredozirovki toshnota rvota diareya boli v zhivote tahikardiya sonlivost i redko gipoglikemiya ili giperglikemiya Glavnoe potencialno opasnoe dlya zhizni oslozhnenie peredozirovki metforminom laktatacidoz kotoryj privodit k nakopleniyu laktata v organizme Pacienty s priznakami laktatacidoza trebuyut nemedlennoj gospitalizacii Specificheskogo antidota pri peredozirovke metforminom net Vnachale pri laktatacidoze vozmozhno primenenie rastvora bikarbonata natriya hotya bolshie dozy ne rekomenduyutsya poskolku eto mozhet uvelichit vnutrikletochnyj acidoz Acidoz kotoryj ne reagiruet na vvedenie bikarbonata natriya trebuet primeneniya standartnogo gemodializa ili nepreryvnoj veno venoznoj Krome togo iz za nizkomolekulyarnosti metformina i otsutstviya svyazyvaniya ego s belkami plazmy eti metody vesma effektivny pri udalenii metformina iz plazmy krovi predotvrashaya dalnejshee nakoplenie laktata Opredelenie urovnya metformina v plazme ili syvorotke krovi vozmozhno dlya kontrolya lecheniya dlya podtverzhdeniya diagnoza peredozirovki u gospitalizirovannyh pacientov ili pri sudmedekspertize dlya ustanovki prichiny smerti Koncentraciya metformina v krovi ili plazme kak pravilo sostavlyaet 1 4 mg l u lic poluchayushih preparat v terapevticheskih celyah 40 120 mg l u lic s peredozirovkoj i 80 200 mg l pri smertelnom ishode Obychno primenyayut hromatograficheskie metody Pri doze 85 g metformina gipoglikemiya ne razvivalas dazhe esli v etih zhe usloviyah razvivalsya laktatacidoz kotoryj takzhe mozhet byt vyzvan peredozirovkoj metformina gidrohlorida ili soputstvuyushimi faktorami riska Rannimi simptomami molochnokislogo acidoza yavlyayutsya povyshenie temperatury tela bol v zhivote mialgiya v dalnejshem mogut otmechatsya tahipnoe golovokruzhenie narushenie soznaniya i razvitie komy Osobye ukazaniyaV razdele ne hvataet ssylok na istochniki sm rekomendacii po poisku Informaciya dolzhna byt proveryaema inache ona mozhet byt udalena Vy mozhete otredaktirovat statyu dobaviv ssylki na avtoritetnye istochniki v vide snosok 16 yanvarya 2024 Pri lechenii neobhodim kontrol funkcii pochek opredelenie laktata v plazme sleduet provodit ne rezhe 2 raz v god a takzhe pri poyavlenii mialgii Pri razvitii laktatacidoza priyom metformina sleduet nezamedlitelno prekratit Ne rekomenduetsya naznachenie pri opasnosti degidratacii Bolshie hirurgicheskie vmeshatelstva i travmy obshirnye ozhogi infekcionnye zabolevaniya s lihoradkoj mogut potrebovat otmeny peroralnyh gipoglikemicheskih lekarstvennyh sredstv i naznacheniya insulina Pri sochetannom lechenii s proizvodnymi sulfonilmocheviny neobhodim tshatelnyj kontrol koncentracii glyukozy v krovi Kombinirovannoe primenenie s insulinom rekomenduetsya provodit v stacionare PrimechaniyaClinical Guidelines Task Force 2005 Glucose control oral therapy PDF In Global Guideline for Type 2 Diabetes ot 13 iyunya 2011 na Wayback Machine Brussels International Diabetes Federation 35 38 National Collaborating Centre for Chronic Conditions Type 2 diabetes national clinical guideline for management in primary and secondary care update angl London Royal College of Physicians 2008 P 86 ISBN 9781860163333 26 iyunya 2013 goda neopr Data obrasheniya 12 dekabrya 2010 Arhivirovano iz originala 26 iyunya 2013 goda Standards of medical care in diabetes 2009 angl angl journal 2009 Vol 32 Suppl 1 P S13 61 doi 10 2337 dc09 S013 PMID 19118286 24 maya 2016 goda WHO 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