{"id":11277,"date":"2023-09-12T10:10:44","date_gmt":"2023-09-12T10:10:44","guid":{"rendered":"https:\/\/flocoaching.nl\/la-decouverte-accidentelle-du-lsd-un-recit-de-serendipite-psychedelique\/"},"modified":"2026-06-02T22:49:58","modified_gmt":"2026-06-02T22:49:58","slug":"la-decouverte-accidentelle-du-lsd-un-recit-de-serendipite-psychedelique","status":"publish","type":"post","link":"https:\/\/flocoaching.nl\/fr\/la-decouverte-accidentelle-du-lsd-un-recit-de-serendipite-psychedelique\/","title":{"rendered":"La d\u00e9couverte accidentelle du LSD : un r\u00e9cit de s\u00e9rendipit\u00e9 psych\u00e9d\u00e9lique"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Le d\u00e9but du 20e si\u00e8cle fut une \u00e9poque de grandes d\u00e9couvertes et de progr\u00e8s en chimie. Les scientifiques per\u00e7aient les secrets des compos\u00e9s pr\u00e9sents dans la nature et commen\u00e7aient \u00e0 synth\u00e9tiser de nouvelles substances en laboratoire. En Suisse, une entreprise pharmaceutique, Sandoz, s&rsquo;\u00e9tait impos\u00e9e comme pionni\u00e8re de la chimie m\u00e9dicale.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans leur laboratoire de B\u00e2le, des chimistes travaillaient d&rsquo;arrache-pied \u00e0 manipuler des compos\u00e9s d\u00e9riv\u00e9s du champignon de l&rsquo;ergot afin de cr\u00e9er de nouveaux m\u00e9dicaments. Dans les ann\u00e9es 1930, Sandoz engagea un jeune chimiste talentueux du nom d&rsquo;Albert Hofmann pour rejoindre leur \u00e9quipe. Ils ne se doutaient pas que cette nouvelle recrue ferait bient\u00f4t l&rsquo;une des d\u00e9couvertes les plus profondes et les plus fortuites de l&rsquo;histoire de la science psych\u00e9d\u00e9lique.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Premiere_synthese_du_LSD\"><\/span>Premi\u00e8re synth\u00e8se du LSD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Albert Hofmann commen\u00e7a \u00e0 travailler pour Sandoz en 1929, alors qu&rsquo;il n&rsquo;avait que 23 ans. Il rejoignit un groupe de chimistes charg\u00e9s de synth\u00e9tiser et de tester des d\u00e9riv\u00e9s du champignon de l&rsquo;ergot. \u00c0 l&rsquo;\u00e9poque, Sandoz recherchait de nouveaux produits pharmaceutiques \u00e0 d\u00e9velopper \u00e0 partir de ces compos\u00e9s de d\u00e9part.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En novembre 1938, cinq ans apr\u00e8s le d\u00e9but de sa carri\u00e8re chez Sandoz, Hofmann synth\u00e9tisa pour la premi\u00e8re fois un compos\u00e9 chimique qui sera plus tard connu sous le nom de di\u00e9thylamide de l&rsquo;acide lysergique, ou LSD. C&rsquo;\u00e9tait le 25e nouveau d\u00e9riv\u00e9 de l&rsquo;ergot qu&rsquo;il avait synth\u00e9tis\u00e9, il fut donc \u00e9tiquet\u00e9 LSD-25.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le proc\u00e9d\u00e9 consistait \u00e0 combiner l&rsquo;acide lysergique extrait de l&rsquo;ergot avec du di\u00e9thylamide pour cr\u00e9er la nouvelle mol\u00e9cule LSD-25. Lorsque Hofmann la cr\u00e9a pour la premi\u00e8re fois, il supposa qu&rsquo;il s&rsquo;agissait d&rsquo;un \u00e9ni\u00e8me produit chimique sans int\u00e9r\u00eat. Sa structure ressemblait \u00e0 celle de la noradr\u00e9naline et des substances stimulantes d\u00e9j\u00e0 connues \u00e0 l&rsquo;\u00e9poque.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le LSD-25 fut essentiellement mis de c\u00f4t\u00e9 apr\u00e8s avoir \u00e9t\u00e9 synth\u00e9tis\u00e9 et consign\u00e9 dans le carnet de laboratoire de Hofmann. Aucun test pharmacologique particulier ne fut effectu\u00e9 sur le compos\u00e9, car on le supposait psychologiquement inactif et indigne d&rsquo;\u00eatre \u00e9tudi\u00e9 plus avant.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce manque de discernement initial montre \u00e0 quel point la d\u00e9couverte ult\u00e9rieure de Hofmann fut un pur accident. Si Hofmann avait su \u00e0 l&rsquo;\u00e9poque ce qu&rsquo;il apprendrait cinq ans plus tard, le LSD aurait probablement \u00e9t\u00e9 \u00e9tudi\u00e9 de mani\u00e8re intensive d\u00e8s le d\u00e9part.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mais en 1938, il fut class\u00e9 comme l&rsquo;un des nombreux d\u00e9riv\u00e9s l\u00e9g\u00e8rement stimulants de l&rsquo;ergot que Sandoz avait cr\u00e9\u00e9s. Le monde resterait dans l&rsquo;ignorance de ses propri\u00e9t\u00e9s psych\u00e9d\u00e9liques jusqu&rsquo;en 1943, lorsque Hofmann allait resynth\u00e9tiser et ing\u00e9rer fatalement le LSD-25.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le v\u00e9ritable potentiel du compos\u00e9 chimique de Hofmann ne serait d\u00e9voil\u00e9 que lorsque cette resynth\u00e8se fortuite et cette courageuse auto-exp\u00e9rimentation donneront naissance \u00e0 l&rsquo;\u00e8re psych\u00e9d\u00e9lique.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"366\" src=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Psychedelic-LSD-Compounds-1024x366.jpg\" alt=\"Rang\u00e9es de flacons et fioles color\u00e9s sur des \u00e9tag\u00e8res, symbole des compos\u00e9s chimiques du LSD\" class=\"wp-image-2999\" srcset=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Psychedelic-LSD-Compounds-1024x366.jpg 1024w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Psychedelic-LSD-Compounds-300x107.jpg 300w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Psychedelic-LSD-Compounds-768x275.jpg 768w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Psychedelic-LSD-Compounds.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"La_fameuse_balade_a_velo_et_le_premier_trip\"><\/span>La fameuse balade \u00e0 v\u00e9lo et le premier trip<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Apr\u00e8s la synth\u00e8se du LSD-25 en 1938, cinq ans pass\u00e8rent sans attention ni recherche particuli\u00e8re sur cette nouvelle substance. Mais en 1943, intrigu\u00e9 par une intuition, Hofmann resynth\u00e9tisa de nouveau le compos\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pendant qu&rsquo;il travaillait avec le LSD-25, il en absorba accidentellement une petite quantit\u00e9 par le bout de ses doigts. De retour chez lui en quittant le laboratoire, Hofmann \u00e9prouva d&rsquo;\u00e9tranges sensations et des distorsions visuelles. R\u00e9alisant qu&rsquo;il pouvait s&rsquo;agir d&rsquo;un effet de la substance chimique, il d\u00e9cida d&rsquo;en prendre une dose plus importante pour le confirmer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le 19 avril 1943, Hofmann ing\u00e9ra d\u00e9lib\u00e9r\u00e9ment 250 microgrammes de LSD qu&rsquo;il avait resynth\u00e9tis\u00e9. Il s&#8217;embarqua bient\u00f4t dans ce qui allait devenir le premier trip \u00e0 l&rsquo;acide intentionnel au monde.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hofmann commen\u00e7a \u00e0 se sentir d\u00e9sorient\u00e9 et angoiss\u00e9 pendant sa balade \u00e0 v\u00e9lo de retour du laboratoire, alors que le LSD faisait effet. Il s&rsquo;agissait de la premi\u00e8re exp\u00e9rience psych\u00e9d\u00e9lique planifi\u00e9e et compl\u00e8te induite par cette substance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il d\u00e9crivit de brillantes couleurs kal\u00e9idoscopiques et des distorsions corporelles surr\u00e9alistes. Tant\u00f4t apeur\u00e9, tant\u00f4t fascin\u00e9, Hofmann lui-m\u00eame avait d\u00e9voil\u00e9 les capacit\u00e9s psych\u00e9d\u00e9liques mystiques du LSD-25.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Apr\u00e8s avoir intentionnellement go\u00fbt\u00e9 \u00e0 sa cr\u00e9ation, Hofmann sut qu&rsquo;il avait d\u00e9couvert quelque chose d&rsquo;incroyablement puissant et qui alt\u00e9rait l&rsquo;esprit. Une substance ayant le pouvoir de modifier profond\u00e9ment la conscience, contrairement \u00e0 tout ce qui \u00e9tait connu \u00e0 l&rsquo;\u00e9poque.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"366\" src=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Bicycle-Ride-LSD-Hofmann-1024x366.jpg\" alt=\"Homme au chapeau p\u00e9dalant sous un oiseau, en r\u00e9f\u00e9rence \u00e0 la c\u00e9l\u00e8bre balade \u00e0 v\u00e9lo d'Albert Hofmann sous LSD\" class=\"wp-image-3000\" srcset=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Bicycle-Ride-LSD-Hofmann-1024x366.jpg 1024w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Bicycle-Ride-LSD-Hofmann-300x107.jpg 300w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Bicycle-Ride-LSD-Hofmann-768x275.jpg 768w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Bicycle-Ride-LSD-Hofmann.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Les_premieres_recherches_sur_le_LSD\"><\/span>Les premi\u00e8res recherches sur le LSD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hofmann informa imm\u00e9diatement ses coll\u00e8gues de Sandoz de son exp\u00e9rience mystique induite par le LSD-25. Bien que m\u00e9fiants au d\u00e9but, ils prirent rapidement conscience de l&rsquo;importance de cette d\u00e9couverte.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sandoz commen\u00e7a \u00e0 tester le LSD sur des animaux, observant sa capacit\u00e9 \u00e0 modifier radicalement le comportement de diverses esp\u00e8ces. Vinrent ensuite des essais sur des sujets humains, notamment des patients psychiatriques et des professionnels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ces premiers tests montr\u00e8rent que le LSD pouvait induire de puissants changements dans l&rsquo;imagination, les \u00e9motions et la perception sensorielle. M\u00eame de minuscules doses produisaient des effets sans \u00e9quivalent parmi les autres agents pharmacologiques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sur la base de ces tests, Sandoz d\u00e9cida de commercialiser le LSD comme m\u00e9dicament psychiatrique sous le nom de \u00ab Delysid \u00bb. Il fut vendu aux chercheurs et aux psychoth\u00e9rapeutes comme adjuvant \u00e0 la th\u00e9rapie tout au long des ann\u00e9es 1940 et jusque dans les ann\u00e9es 1950.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le bruit courut \u00e9galement parmi les psychiatres et les psychoth\u00e9rapeutes au sujet des qualit\u00e9s psychotropes uniques du LSD pour potentiellement am\u00e9liorer les traitements. Les premiers articles vant\u00e8rent sa capacit\u00e9 \u00e0 \u00ab mod\u00e9liser \u00bb temporairement les maladies mentales et \u00e0 provoquer des prises de conscience.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bien que Sandoz esp\u00e9r\u00e2t conserver le LSD comme un m\u00e9dicament de recherche strictement contr\u00f4l\u00e9, son myst\u00e8re s&rsquo;infiltra lentement dans le monde au sens large, pr\u00e9parant le terrain pour la r\u00e9volution psych\u00e9d\u00e9lique.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"366\" src=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Trip-Therapists-1024x366.jpg\" alt=\"Visage color\u00e9 avec un \u0153il parmi des tourbillons, symbole d'un trip au LSD\" class=\"wp-image-3001\" srcset=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Trip-Therapists-1024x366.jpg 1024w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Trip-Therapists-300x107.jpg 300w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Trip-Therapists-768x275.jpg 768w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Trip-Therapists.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Le_LSD_se_repand_dans_le_monde\"><\/span>Le LSD se r\u00e9pand dans le monde<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Au d\u00e9but des ann\u00e9es 1950, la rumeur des capacit\u00e9s du LSD \u00e0 \u00e9largir la conscience s&rsquo;\u00e9tendit progressivement au-del\u00e0 des cercles psychiatriques, atteignant le gouvernement et la contre-culture.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Des groupes comme la CIA s&rsquo;int\u00e9ress\u00e8rent au LSD, l&rsquo;exp\u00e9rimentant pour des programmes de contr\u00f4le mental et des interrogatoires militaires. En m\u00eame temps, des auteurs et des professeurs comme Timothy Leary, Ken Kesey et Aldous Huxley acc\u00e9d\u00e8rent \u00e0 cette substance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ces figures de la contre-culture se mirent \u00e0 vanter la capacit\u00e9 du LSD \u00e0 \u00ab \u00e9veiller \u00bb l&rsquo;esprit, \u00e0 d\u00e9fier la pens\u00e9e conventionnelle et \u00e0 lib\u00e9rer la cr\u00e9ativit\u00e9. Le LSD s&rsquo;\u00e9chappa des environnements de recherche strictement contr\u00f4l\u00e9s et entra dans l&rsquo;usage r\u00e9cr\u00e9atif.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans les ann\u00e9es 1960, le LSD \u00e9tait devenu une drogue embl\u00e9matique du mouvement anti-guerre et de la r\u00e9volution psych\u00e9d\u00e9lique. L&rsquo;usage r\u00e9cr\u00e9atif croissant entra\u00eena une publicit\u00e9 n\u00e9gative et un mouvement de r\u00e9action. En 1970, le LSD fut interdit au niveau f\u00e9d\u00e9ral et class\u00e9 comme substance illicite.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bien que le g\u00e9nie psych\u00e9d\u00e9lique f\u00fbt sorti de la bouteille, la recherche et l&rsquo;acc\u00e8s furent strictement limit\u00e9s pendant des d\u00e9cennies. Mais quelques rares personnes comme Hofmann continu\u00e8rent de plaider pour un usage s\u00fbr et responsable du LSD.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"366\" src=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Hippies-1024x366.jpg\" alt=\"Camping-car orange r\u00e9tro dans un paysage de montagne automnal, en r\u00e9f\u00e9rence \u00e0 la culture hippie et au LSD\" class=\"wp-image-3002\" srcset=\"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Hippies-1024x366.jpg 1024w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Hippies-300x107.jpg 300w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Hippies-768x275.jpg 768w, https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/LSD-Hippies.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Les_dernieres_annees_de_Hofmann_et_le_renouveau_de_la_science_psychedelique\"><\/span>Les derni\u00e8res ann\u00e9es de Hofmann et le renouveau de la science psych\u00e9d\u00e9lique<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00eame \u00e0 70, 80 et 90 ans, Albert Hofmann soutint que le LSD pouvait offrir des exp\u00e9riences porteuses de sens s&rsquo;il \u00e9tait mani\u00e9 avec prudence. Il appelait \u00e0 une approche plus raisonnable et mesur\u00e9e de la recherche sur les drogues psych\u00e9d\u00e9liques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Juste avant son 100e anniversaire en 2006, Hofmann vit les pr\u00e9mices d&rsquo;un renouveau de la science et de la th\u00e9rapie psych\u00e9d\u00e9liques. Des institutions de recherche exploraient \u00e0 nouveau les usages m\u00e9dicaux du LSD et de compos\u00e9s similaires.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au moment de sa mort, \u00e0 l&rsquo;\u00e2ge de 102 ans en 2008, plusieurs \u00e9tudes prometteuses sur le LSD avaient d\u00e9j\u00e0 \u00e9t\u00e9 publi\u00e9es. Les premiers essais montraient le potentiel du LSD \u00e0 aider en cas d&rsquo;anxi\u00e9t\u00e9, de d\u00e9pendance et d&rsquo;algie vasculaire de la face dans des cadres supervis\u00e9s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce renouveau se poursuit aujourd&rsquo;hui, alors que de nouvelles g\u00e9n\u00e9rations de chercheurs en psych\u00e9d\u00e9liques marchent dans les pas de Hofmann. Des \u00e9tudes contr\u00f4l\u00e9es sur le LSD aident \u00e0 percer les myst\u00e8res de la conscience et le potentiel curatif des \u00e9tats modifi\u00e9s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Plus de 75 ans apr\u00e8s sa d\u00e9couverte initiale, la recherche sur le LSD a boucl\u00e9 la boucle gr\u00e2ce \u00e0 des pionniers comme Hofmann, qui reconnurent les immenses capacit\u00e9s de cette substance puissante lorsqu&rsquo;elle \u00e9tait mani\u00e9e avec sagesse.<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;histoire de la d\u00e9couverte accidentelle du LSD par Albert Hofmann \u2014 un r\u00e9cit de s\u00e9rendipit\u00e9 au c\u0153ur de la culture psych\u00e9d\u00e9lique.<\/p>\n","protected":false},"author":1,"featured_media":6115,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110,1],"tags":[],"class_list":["post-11277","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-psychedelics-fr","category-x","infinite-scroll-item"],"featured_image_src":"https:\/\/flocoaching.nl\/wp-content\/uploads\/2023\/09\/Albert-Hofmann-LSD-Discovery-2.jpg","author_info":{"display_name":"flotte","author_link":"https:\/\/flocoaching.nl\/fr\/author\/flotte\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La d\u00e9couverte accidentelle du LSD : un r\u00e9cit de s\u00e9rendipit\u00e9 psych\u00e9d\u00e9lique |<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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