{"id":342919,"date":"2015-08-21T01:00:00","date_gmt":"2015-08-20T23:00:00","guid":{"rendered":"https:\/\/medizinonline.com\/eficacia-e-tolerabilidade-do-extracto-de-ginkgo-biloba-egb-761-em-demencia\/"},"modified":"2015-08-21T01:00:00","modified_gmt":"2015-08-20T23:00:00","slug":"eficacia-e-tolerabilidade-do-extracto-de-ginkgo-biloba-egb-761-em-demencia","status":"publish","type":"post","link":"https:\/\/medizinonline.com\/pt-pt\/eficacia-e-tolerabilidade-do-extracto-de-ginkgo-biloba-egb-761-em-demencia\/","title":{"rendered":"Efic\u00e1cia e tolerabilidade do extracto de Ginkgo biloba EGb 761 em dem\u00eancia"},"content":{"rendered":"<p><strong>A efic\u00e1cia do extracto de Ginkgobiloba EGb 761 em perturba\u00e7\u00f5es cognitivas como a dem\u00eancia \u00e9 repetidamente posta em d\u00favida. Uma meta-an\u00e1lise avaliou recentemente sete ensaios cl\u00ednicos com um elevado n\u00edvel qualitativo e voltou a demonstrar a efic\u00e1cia do EGb 761 em dem\u00eancia.<\/strong><\/p>\n<div alt=\"0\" id=\"SL_balloon_obj\" style=\"display: block;\">\n<div class=\"SL_ImTranslatorLogo\" id=\"SL_button\" style=\"background: rgba(0, 0, 0, 0) url(\"moz-extension:\/\/27c8b66b-4e69-a543-b12c-ee19d038addf\/content\/img\/util\/imtranslator-s.png\") repeat scroll 0% 0%; display: none; opacity: 1; left: 5px; top: 20px;\">&nbsp;<\/div>\n<div id=\"SL_shadow_translation_result2\" style=\"display: none;\">&nbsp;<\/div>\n<div id=\"SL_shadow_translator\" style=\"left: 25px; top: 0px; display: none;\">\n<div id=\"SL_planshet\">\n<div id=\"SL_arrow_up\" style=\"background: rgba(0, 0, 0, 0) url(\"moz-extension:\/\/27c8b66b-4e69-a543-b12c-ee19d038addf\/content\/img\/util\/up.png\") repeat scroll 0% 0%;\">&nbsp;<\/div>\n<div id=\"SL_Bproviders\">&nbsp;<\/div>\n<div id=\"SL_alert_bbl\" style=\"display: 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unido\">Ucraniano<\/option><option value=\"hu\">H\u00fangaro<\/option><option value=\"ur\">Urdu<\/option><option value=\"uz\">Uzbeque<\/option><option value=\"vi\">Vietnamita<\/option><option value=\"cy\">Gal\u00eas<\/option><option value=\"ser\">Branco Russo<\/option><option value=\"xh\">Xhosa<\/option><option value=\"yo\">Iorub\u00e1<\/option><option value=\"para\">Zulu<\/option><\/select><\/strong><\/strong><\/td>\n<td align=\"center\" class=\"SL_td\" width=\"8%\">\n<div id=\"SL_TTS_voice\" style=\"background: rgba(0, 0, 0, 0) url(\"moz-extension:\/\/27c8b66b-4e69-a543-b12c-ee19d038addf\/content\/img\/util\/ttsvoice.png\") repeat scroll 0% 0%;\" title=\"indefinido\">&nbsp;<\/div>\n<\/td>\n<td align=\"center\" class=\"SL_td\" width=\"8%\">\n<div class=\"SL_copy\" id=\"SL_copy\" style=\"background: rgba(0, 0, 0, 0) url(\"moz-extension:\/\/27c8b66b-4e69-a543-b12c-ee19d038addf\/content\/img\/util\/copy.png\") repeat scroll 0% 0%;\" title=\"C\u00f3pia\">&nbsp;<\/div>\n<\/td>\n<td 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EGb 761 \u00e9 um extracto seco de folhas de Ginkgo biloba com uma rela\u00e7\u00e3o droga-extracto de 35-67:1 e acetona (60%) como agente extractor. O extracto \u00e9 ajustado para 22-27% flavone glic\u00f3sidos e 5-7% terpenos lactonas, calculados como 2,8-3,4% ginkgolides A, B, C e 2,6-3,2% bilob\u00e1lidos. O teor de \u00e1cidos ginkg\u00f3licos n\u00e3o deve exceder 5 ppm.<\/p>\n<h2 id=\"estudos\">Estudos<\/h2>\n<p>Foram inclu\u00eddos na revis\u00e3o estudos de RCT que preenchiam os seguintes crit\u00e9rios: dura\u00e7\u00e3o m\u00ednima de 20 semanas de estudo, indiv\u00edduos diagnosticados com dem\u00eancia (AD, VaD ou mistos) de acordo com o CID-10 e pelo menos duas vari\u00e1veis de resultados prim\u00e1rios t\u00edpicos para a avalia\u00e7\u00e3o da dem\u00eancia (fun\u00e7\u00f5es cognitivas, actividades da vida di\u00e1ria e avalia\u00e7\u00e3o cl\u00ednica global). Foram exclu\u00eddos os estudos que utilizaram o EGb 761 como tratamento adicional aos inibidores da colinesterase.<\/p>\n<p>Sete estudos preencheram estes crit\u00e9rios, com uma pontua\u00e7\u00e3o JADAD de 3-5 [2\u201310]. Os dois estudos de Kanowski [4,5] e de Le Bars [6,7] s\u00e3o ambos o mesmo estudo, que foi posteriormente reavaliado para uma an\u00e1lise de subgrupos.<\/p>\n<p>Seis estudos inscreveram doentes com sintomas neuropsiqui\u00e1tricos (NPS) [2\u20139]. Em quatro destes estudos [2,3,8,9], a presen\u00e7a de NPS era um crit\u00e9rio de inclus\u00e3o obrigat\u00f3ria. Nestes estudos, foi observado um total de 2684 pacientes, 1423 nos grupos EGb 761, 1261 nos grupos placebo. Nos estudos de Le Bars e de Schneider, a dose di\u00e1ria de EGb 761 era de 120 mg, nos outros estudos de 240 mg.<\/p>\n<h2 id=\"parametros-alvo\">Par\u00e2metros alvo<\/h2>\n<p><strong>Fun\u00e7\u00f5es cognitivas:<\/strong> Todos os estudos avaliaram as fun\u00e7\u00f5es cognitivas. Cinco estudos [2\u20134,8,9] utilizaram o Short Cognitive Performance Test (SKT), dois estudos [6,10] testaram as fun\u00e7\u00f5es cognitivas com a escala de avalia\u00e7\u00e3o da doen\u00e7a de Alzheimer (ADAS-cog). Os dois testes t\u00eam uma grande concord\u00e2ncia, testam as mesmas capacidades e s\u00e3o portanto compar\u00e1veis um com o outro.<\/p>\n<p><strong>Actividades di\u00e1rias:<\/strong> Todos os estudos examinaram as actividades di\u00e1rias dos sujeitos. Dois estudos [6,10] utilizaram o &#8220;Geriatric Evaluation by Relative&#8217;s Rating Instrument&#8221; (GERRI) para este fim, dois estudos [8,9] the Gottfries-Br\u00e5ne Standing Scale&#8217;s Activities of Daily Living Test (GBS-ADL). Dois estudos [3,4] avaliaram actividades de vida di\u00e1ria com a Escala Internacional de Actividades de Vida Di\u00e1ria da Doen\u00e7a de Alzheimer (ADL-IS), um estudo [5] utilizou a Escala de Observa\u00e7\u00e3o do Envelhecimento de Nuremberga (NAB).<\/p>\n<p><strong>Avalia\u00e7\u00e3o cl\u00ednica global: <\/strong>Todos os sete estudos analisados realizaram uma avalia\u00e7\u00e3o cl\u00ednica global (CGI). Dois estudos [4,6] fizeram-no com o Estudo Cl\u00ednico de Impress\u00e3o Global Tradicional da Mudan\u00e7a (CGIC), tr\u00eas estudos [2,3,10] com o Estudo Cl\u00ednico de Impress\u00e3o Global da Mudan\u00e7a da Doen\u00e7a de Alzheimer (ADCS-CGIC) e dois estudos [8,9] com a Escala Permanente de Gottfries-Br\u00e5ne, uma avalia\u00e7\u00e3o global geri\u00e1trica.<\/p>\n<h2 id=\"resultados\">Resultados<\/h2>\n<p><strong>Fun\u00e7\u00f5es cognitivas: <\/strong>Cinco dos sete estudos [2\u20135,8,9] mostraram uma melhoria significativa para o grupo EGb 761 em compara\u00e7\u00e3o com o placebo (p=0,02), dois estudos [6,7,10] mostraram uma melhoria n\u00e3o significativa para o grupo EGb 761 (p=0,77). Na meta-an\u00e1lise dos sete estudos, EGb 761 provou ser significativamente superior ao placebo (p=0,03). Uma an\u00e1lise de subgrupo dos estudos de avalia\u00e7\u00e3o das fun\u00e7\u00f5es cognitivas com SKT mostrou uma superioridade ainda mais significativa de EGb 761 (p=0,02). O efeito do EGb 761 sobre as fun\u00e7\u00f5es cognitivas \u00e9 dose-dependente. Os dois estudos com uma dose di\u00e1ria de 120&nbsp;mg mostraram uma superioridade n\u00e3o significativa, enquanto que a superioridade dos estudos com 240 mg EGb 761 por dia foi significativa. A maior melhoria foi conseguida nos estudos que inclu\u00edram o NPS (p=0,02).<\/p>\n<p><strong>actividades da vida quotidiana:<\/strong> A meta-an\u00e1lise mostrou uma superioridade significativa para os grupos EGb 761 em compara\u00e7\u00e3o com o placebo (p=0,006). Tamb\u00e9m aqui, os estudos com uma dose di\u00e1ria de 240 mg provaram ser claramente superiores aos estudos com apenas 120 mg: S\u00f3 eles atingiram significado (p=0,001 vs. p=0,35). Os estudos com NPS tiveram melhor desempenho em compara\u00e7\u00e3o com placebo (p=0,002).<\/p>\n<p><strong>Avalia\u00e7\u00e3o cl\u00ednica global:<\/strong> o mesmo quadro foi visto na avalia\u00e7\u00e3o cl\u00ednica global: a meta-an\u00e1lise dos sete estudos mostrou uma superioridade significativa do EGb 761 em rela\u00e7\u00e3o ao placebo (p=0,01). Os dois estudos com uma dose di\u00e1ria de 120&nbsp;mg n\u00e3o atingiram significado (p=0,37). No entanto, os grupos EGb 761 com uma dose di\u00e1ria de 240&nbsp;mg foram considerados significativamente superiores ao placebo (p=0,007). Os estudos com o NPS mostraram novamente um benef\u00edcio significativo em compara\u00e7\u00e3o com o placebo. <strong>O quadro&nbsp;1<\/strong> mostra uma vis\u00e3o geral dos resultados.<\/p>\n<p>&nbsp;<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\" size-full wp-image-5969\" alt=\"\" src=\"https:\/\/medizinonline.com\/wp-content\/uploads\/2015\/08\/tab1_s2.jpg\" style=\"height:375px; width:1100px\" width=\"1100\" height=\"375\" srcset=\"https:\/\/medizinonline.com\/wp-content\/uploads\/2015\/08\/tab1_s2.jpg 1100w, https:\/\/medizinonline.com\/wp-content\/uploads\/2015\/08\/tab1_s2-800x273.jpg 800w, https:\/\/medizinonline.com\/wp-content\/uploads\/2015\/08\/tab1_s2-120x41.jpg 120w, https:\/\/medizinonline.com\/wp-content\/uploads\/2015\/08\/tab1_s2-90x31.jpg 90w, https:\/\/medizinonline.com\/wp-content\/uploads\/2015\/08\/tab1_s2-320x109.jpg 320w, https:\/\/medizinonline.com\/wp-content\/uploads\/2015\/08\/tab1_s2-560x191.jpg 560w\" sizes=\"(max-width: 1100px) 100vw, 1100px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h2 id=\"eventos-adversos\">Eventos adversos<\/h2>\n<p>Em dois dos sete estudos, o n\u00famero de sujeitos com pelo menos um evento adverso documentado foi ligeiramente superior no grupo EGb 761 do que no grupo placebo. N\u00e3o foi encontrada qualquer diferen\u00e7a nos outros estudos. Globalmente, n\u00e3o era evidente no grupo verum qualquer tend\u00eancia para um aumento do risco de acontecimentos adversos. Os eventos adversos mais frequentemente documentados foram dores de cabe\u00e7a (EGb 761 11% vs. placebo 14%), tonturas (5% vs. 9%), hipertens\u00e3o (4% vs. 4%), tinido (3% vs. 4%), angina de peito (3% vs. 4%) e infec\u00e7\u00f5es respirat\u00f3rias (3% vs. 3%).<\/p>\n<h2 id=\"resumo\">Resumo<\/h2>\n<p>Esta meta-an\u00e1lise de estudos de alta qualidade que analisam a efic\u00e1cia e seguran\u00e7a do extracto de Ginkgo biloba EGb 761 versus placebo em dem\u00eancia com ou sem sintomas neuropsiqui\u00e1tricos mostrou uma superioridade significativa do EGb&nbsp;761 sobre o placebo. Isto dizia respeito \u00e0s fun\u00e7\u00f5es cognitivas, \u00e0s actividades di\u00e1rias e \u00e0 avalia\u00e7\u00e3o cl\u00ednica global. Enquanto os estudos com uma dose di\u00e1ria de 120 mg de EGb&nbsp;761 documentaram uma superioridade n\u00e3o significativa, a dose di\u00e1ria de 2\u00d7 120&nbsp;mg provou ser significativamente superior. EGb 761 \u00e9 particularmente eficaz na presen\u00e7a de sintomas neuropsiqui\u00e1tricos. Em todos os estudos, incluindo o NPS, o EGb 761 mostrou uma superioridade significativa.<\/p>\n<p>N\u00e3o foram encontradas diferen\u00e7as significativas no tipo e frequ\u00eancia dos eventos adversos documentados entre os grupos verum e placebo. Isto faz do EGb 761 uma terapia eficaz e segura para a dem\u00eancia com ou sem NPS.<\/p>\n<p>Literatura:<\/p>\n<ol>\n<li>Gauthier S, Schlaefke S: Interven\u00e7\u00f5es cl\u00ednicas no envelhecimento 2014; 9: 2065-2077.<\/li>\n<li>Herrschaft H, et al: J Psychiatr Res 2012; 46(6): 716-723.<\/li>\n<li>Ihl R, et al: Psychiatry 2011; 26(11): 1186-1194.<\/li>\n<li>Kanowski S, et al: Pharmacopsychiatry 1996; 29(2): 47-56.<\/li>\n<li>Kanowski S, Hoerr R: Phyrmacopsychiatry 2003; 36(6): 297-303.<\/li>\n<li>Le Bars PL, et al: JAMA 1997; 278(16): 1327-1332.<\/li>\n<li>Le Bars PL, et al: Dement Geriatr Cogn Disord 2000; 11(4): 230-237.<\/li>\n<li>Napryeyenko O, Borzenko I: Drug Research 2007; 57(1): 4-11.<\/li>\n<li>Nikolova S, et al: Bulgarian Neurology 2013; 14(3): 139-143.<\/li>\n<li>Schneider LS, et al: Curr Alzheimer Res 2005; 2(5): 541-551.<\/li>\n<\/ol>\n<p><em>PR\u00c1TICA DO GP 2015; 10(8): 2<\/em><\/p>\n<div alt=\"0\" id=\"SL_balloon_obj\" style=\"display: block;\">\n<div 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Uma meta-an\u00e1lise avaliou recentemente sete ensaios cl\u00ednicos com um elevado n\u00edvel&hellip;<\/p>\n","protected":false},"author":5,"featured_media":51944,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","cat_1_feature_home_top":false,"cat_2_editor_pick":false,"csco_eyebrow_text":"Meta-an\u00e1lise de ensaios aleatorizados, controlados por placebo","footnotes":""},"category":[11521,11374,11517,11551],"tags":[12159,15088,24261],"powerkit_post_featured":[],"class_list":["post-342919","post","type-post","status-publish","format-standard","has-post-thumbnail","category-estudos","category-neurologia-pt-pt","category-noticias-pt-pt","category-rx-pt","tag-demencia-pt-pt","tag-ginkgo-pt-pt","tag-placebo-pt-pt","pmpro-has-access"],"acf":[],"publishpress_future_action":{"enabled":false,"date":"2026-04-26 05:42:52","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"wpml_current_locale":"pt_PT","wpml_translations":{"es_ES":{"locale":"es_ES","id":342922,"slug":"eficacia-y-tolerabilidad-del-extracto-de-ginkgo-biloba-egb-761-en-la-demencia","post_title":"Eficacia y tolerabilidad del extracto de Ginkgo biloba EGb 761 en la demencia","href":"https:\/\/medizinonline.com\/es\/eficacia-y-tolerabilidad-del-extracto-de-ginkgo-biloba-egb-761-en-la-demencia\/"}},"_links":{"self":[{"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/posts\/342919","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/comments?post=342919"}],"version-history":[{"count":0,"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/posts\/342919\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/media\/51944"}],"wp:attachment":[{"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/media?parent=342919"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/category?post=342919"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/tags?post=342919"},{"taxonomy":"powerkit_post_featured","embeddable":true,"href":"https:\/\/medizinonline.com\/pt-pt\/wp-json\/wp\/v2\/powerkit_post_featured?post=342919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}