{"id":19082,"date":"2021-09-14T18:53:15","date_gmt":"2021-09-14T16:53:15","guid":{"rendered":"https:\/\/www.ecoceutics.com\/que-es-lefecte-placebo\/"},"modified":"2024-02-02T13:41:34","modified_gmt":"2024-02-02T12:41:34","slug":"que-es-lefecte-placebo","status":"publish","type":"post","link":"https:\/\/www.ecoceutics.com\/ca\/per-professionals-de-la-salut\/que-es-lefecte-placebo\/","title":{"rendered":"Qu\u00e8 \u00e9s l&#8217;efecte placebo?"},"content":{"rendered":"<p>El placebo, segons el diccionari de la Reial Acad\u00e8mia Espanyola, \u00e9s una \u00absubst\u00e0ncia que, mancant per si mateixa d\u2019acci\u00f3 terap\u00e8utica, produeix algun efecte favorable en el malalt, si aquest la rep conven\u00e7ut que aquesta subst\u00e0ncia posseeix realment tal acci\u00f3.\u00bb \u00c9s a dir, \u00e9s possible que una subst\u00e0ncia no medicamentosa i sense cap activitat real en el nostre organisme sigui percebuda com a posse\u00efdora de propietats curatives; a aquest efecte se\u2019n diu efecte placebo.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contenido de la p\u00e1gina<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #333333;color:#333333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #333333;color:#333333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ecoceutics.com\/ca\/per-professionals-de-la-salut\/que-es-lefecte-placebo\/#per-que-succeeix-lefecte-placebo\" >Per qu\u00e8 succeeix l\u2019efecte placebo?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ecoceutics.com\/ca\/per-professionals-de-la-salut\/que-es-lefecte-placebo\/#quant-fa-que-es-coneix-lefecte-placebo\" >Quant fa que es coneix l\u2019efecte placebo?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ecoceutics.com\/ca\/per-professionals-de-la-salut\/que-es-lefecte-placebo\/#per-a-que-serveix-lefecte-placebo-avui-dia\" >Per a qu\u00e8 serveix l\u2019efecte placebo avui dia?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ecoceutics.com\/ca\/per-professionals-de-la-salut\/que-es-lefecte-placebo\/#es-etic-utilitzar-placebos\" >\u00c9s \u00e8tic utilitzar placebos?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"per-que-succeeix-lefecte-placebo\"><\/span>Per qu\u00e8 succeeix l\u2019efecte placebo?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Per comen\u00e7ar, una de les raons de l\u2019efecte placebo \u00e9s que les subst\u00e0ncies inn\u00f2cues es poden utilitzar en processos fisiol\u00f2gics que s\u2019alleugen per si sols, generant la idea de \u00abcausa de curaci\u00f3\u00bb. Per exemple, la diarrea per alguna cosa que t\u2019ha posat malament sol desapar\u00e8ixer sola en pocs dies, amb el menjar i beguda adequats. Si a m\u00e9s prenguessis un te d\u2019herbes (per dir alguna cosa) cada vegada que tinguessis una diarrea d\u2019aquest estil, pensaries que el te \u00e9s curatiu, quan la realitat \u00e9s que la diarrea es va curar amb dieta i paci\u00e8ncia i que el te va servir solament per a hidratar-te perqu\u00e8 cont\u00e9 aigua. El teu te d\u2019herbes seria, amb el pas dels anys, l&#8217;\u00bboli en un llum\u00bb que s\u2019utilitza en la teva fam\u00edlia cada vegada que hi ha un malestar digestiu, encara que nom\u00e9s fos un preparat sense cap activitat farmacol\u00f2gica.<\/p>\n<p>Explicar l\u2019efecte placebo en el cas de subst\u00e0ncies inn\u00f2cues que s\u2019utilitzen en processos que requereixen tractament per a la seva curaci\u00f3 \u00e9s una mica m\u00e9s complex. Les raons encara no s\u00f3n clares, per\u00f2 alguns factors que se sap que influeixen s\u00f3n:<\/p>\n<ul>\n<li>La confian\u00e7a en el metge que recepta el placebo.<\/li>\n<li>La il\u00b7lusi\u00f3 que es crea en el pacient en rebre la recepta, o en administrar-se-li el placebo. Se sap que si un metge, farmac\u00e8utic o infermer diu alguna cosa aix\u00ed com \u00abprengui-ho amb confian\u00e7a que li anir\u00e0 b\u00e9\u00bb no \u00e9s el mateix que \u00abli donem aix\u00f2 que pot ser que li funcioni, ja em dir\u00e0\u00bb.<\/li>\n<li>El suposat coneixement del mecanisme d\u2019acci\u00f3 del que s\u2019est\u00e0 prenent el pacient. Si t\u2019expliquen i et convencen que aquest comprimit que t\u2019has pres t\u00e9 un principi actiu que inhibeix l\u2019activitat d\u2019enzim COIX-2, evitant la s\u00edntesi de prostaglandines que participen en el proc\u00e9s inflamatori i impedint que s\u2019activin les vies del dolor, segur que el dolor se\u2019n va, hi hagi o no hi hagi principi actiu en aquest comprimit.<\/li>\n<li>Sentir-te cuidat. Estar en una cl\u00ednica amb doctors que t\u2019escolten, infermeres que t\u2019atenen i amb maquin\u00e0ria sofisticada a la teva disposici\u00f3, impacta positivament en la teva manera de percebre el teu malestar.<\/li>\n<\/ul>\n<p>Se sap que l\u2019efecte placebo, encara que no est\u00e0 perfectament descrit, involucra reaccions neuronals complexes en les quals augmenten neurotransmissors relacionats amb el benestar, com la dopamina i les endorfines, aix\u00ed com major activitat cerebral en zones lligades a l\u2019humor, a les reaccions emocionals, i a l\u2019autoconsci\u00e8ncia.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"quant-fa-que-es-coneix-lefecte-placebo\"><\/span>Quant fa que es coneix l\u2019efecte placebo?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>L\u2019efecte placebo va estar darrere de la utilitzaci\u00f3 sistem\u00e0tica al llarg de la hist\u00f2ria de medicaments que avui sabem que no servien per a res, com la triaca o els elixirs miraculosos. En una \u00e8poca en qu\u00e8 la medicina i la farm\u00e0cia estaven a les beceroles, almenys l\u2019efecte placebo donava una mica de millora en problemes de salut que no podien ser arreglats per falta de mitjans adequats. I els metges ho han sabut durant segles:&nbsp;Ambroise&nbsp;Par\u00e9, metge franc\u00e8s que va viure en el segle XVI, ja deia que els metges havien de \u00abcurar ocasionalment, alleujar sovint, consolar sempre\u00bb.<\/p>\n<p>El primer registre de la demostraci\u00f3 de l\u2019efecte placebo com a tal va haver d\u2019esperar fins a l\u2019any 1800. En aquests anys s\u2019havia posat de moda un tractament que consistia a passar una vara composta per un aliatge met\u00e0l\u00b7lic secret per sobre d\u2019una zona adolorida perqu\u00e8 el dolor es cur\u00e9s. John&nbsp;Haygarth, un metge angl\u00e8s, va demostrar que era igual passar la vara d\u2019aquest aliatge, una vara met\u00e0l\u00b7lica, o una vara de fusta pintada per a semblar metall; les tres vares&nbsp;tenien&nbsp;un percentatge d\u2019\u00e8xit similar. Aix\u00ed, amb un sol experiment va desbancar un tractament que no era tal i va demostrar que la ment t\u00e9 poders curatius si est\u00e0 conven\u00e7uda que el tractament funciona. Els seus resultats van ser publicats en un llibre anomenat \u00abOf&nbsp;the&nbsp;imagination&nbsp;as a&nbsp;cause&nbsp;and&nbsp;as a&nbsp;cure&nbsp;of&nbsp;disorders&nbsp;of&nbsp;the&nbsp;body\u00bb (De la imaginaci\u00f3 com a causa i cura dels desordres del cos). Per\u00f2 no va ser fins a l\u2019any 1920 que es va parlar per primera vegada de l\u2019efecte placebo com a tal en una publicaci\u00f3 cient\u00edfica, i recentment l\u2019any 1931 es va realitzar el primer assaig cl\u00ednic utilitzant un grup de control amb placebo com a control dels resultats obtinguts pel medicament assajat.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"per-a-que-serveix-lefecte-placebo-avui-dia\"><\/span>Per a qu\u00e8 serveix l\u2019efecte placebo avui dia?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Avui dia els placebos s\u2019utilitzen en alguns assajos cl\u00ednics: simplificant molt, podem dir que s\u2019estableix un grup de control de pacients que reben placebo i es comparen els seus resultats contra els d\u2019un grup experimental que reben el medicament investigat. La comparaci\u00f3 de resultats permetr\u00e0 saber si el medicament nou pot resultar \u00fatil, ja que com a m\u00ednim se li exigir\u00e0 que tingui millors resultats que els resultats obtinguts per l\u2019efecte placebo. Existeixen alguns tipus d\u2019assajos cl\u00ednics en els quals el placebo no resultaria \u00e8tic, com els assajos en pacients amb c\u00e0ncer: negar un medicament a un pacient oncol\u00f2gic significaria la seva mort o empitjorament, per la qual cosa els nous medicaments oncol\u00f2gics es comparen amb els antics. Aix\u00ed es pot saber si s\u00f3n millors, pitjors, o iguals que els tractaments ja existents, per\u00f2 no hi haur\u00e0 comparaci\u00f3 contra placebo.<\/p>\n<p>Finalment, alguns metges encara usen vitamines o pastilles de sucre com a placebos per als seus pacients. S\u2019ha vist que funcionen b\u00e9 en problemes relacionats amb el dolor, l\u2019estr\u00e8s, l\u2019ansietat i efectes adversos de la ter\u00e0pia oncol\u00f2gica com la fatiga i la n\u00e0usea. I moltes vegades funciona encara quan s\u2019avisa al pacient que s\u2019est\u00e0 prenent un placebo! El cervell i el nostre cos s\u00f3n veritablement meravellosos.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"es-etic-utilitzar-placebos\"><\/span>\u00c9s \u00e8tic utilitzar placebos?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hi ha una discussi\u00f3 interessant al voltant d\u2019aquesta pregunta. Enquestes realitzades al voltant del m\u00f3n demostren que els metges recepten placebos quan un pacient \u00abnecessita calmar-se\u00bb, o quan el pacient demana medicaci\u00f3 de manera injustificada. Hi ha qui diu que el metge o el farmac\u00e8utic involucrat estan enganyant al pacient, per\u00f2 contra aquest argument est\u00e0 el \u00absi funciona, \u00e9s tractament efectiu i ning\u00fa ha estat enganyat\u00bb. Tamb\u00e9 hi ha qui ho defensa dient \u00abimagina treure el dolor amb aigua, sense afegir els efectes adversos dels analg\u00e8sics\u00bb. Sembla incre\u00edble,&nbsp;oi? En qualsevol cas, s\u2019han d\u2019utilitzar quan s\u2019est\u00e0 segur que \u00e9s la millor intervenci\u00f3 per a un pacient i que no hi ha necessitat de medicaci\u00f3 \u00abde deb\u00f2\u00bb.<\/p>\n<p>El que&nbsp;s\u00ed que&nbsp;\u00e9s clar \u00e9s que encara ens falta molt per saber sobre el nostre cervell i la seva interacci\u00f3 amb el cos, i els placebos s\u00f3n la millor prova d\u2019aix\u00f2.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El placebo, segons el diccionari de la Reial Acad\u00e8mia Espanyola, \u00e9s una \u00absubst\u00e0ncia que, mancant per si mateixa d\u2019acci\u00f3 terap\u00e8utica, produeix algun efecte favorable en el malalt, si aquest la rep conven\u00e7ut que aquesta subst\u00e0ncia posseeix realment tal acci\u00f3.\u00bb \u00c9s a dir, \u00e9s possible que una subst\u00e0ncia no medicamentosa i sense cap activitat real en [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":18808,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[71,433],"tags":[],"class_list":["post-19082","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-per-professionals-de-la-salut","category-publicacions-per-a-farmaceutics"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>En qu\u00e8 consisteix l&#039;efecte placebo? 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