{"id":4553,"date":"2015-05-11T13:09:30","date_gmt":"2015-05-11T11:09:30","guid":{"rendered":"http:\/\/www.cannabis.es\/pw\/?p=4553"},"modified":"2020-06-07T18:27:19","modified_gmt":"2020-06-07T16:27:19","slug":"riesgos-para-la-salud-del-consumo-de-cannabis-4","status":"publish","type":"post","link":"https:\/\/www.cannabis.es\/pw\/2015\/05\/11\/riesgos-para-la-salud-del-consumo-de-cannabis-4\/","title":{"rendered":"RIESGOS PARA LA SALUD DEL CONSUMO DE CANNABIS (4)"},"content":{"rendered":"\n<p>Por Dr. Fernando Caudevilla<\/p>\n\n\n\n<p>\u00daltima entrega de la serie de art\u00edculos del&nbsp;<strong>Dr. Fernando Caudevilla<\/strong>&nbsp;sobre los riesgos para la salud asociados al consumo de cannabis.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>Puedes encontrar los cap\u00edtulos anteriores siguendo los links:\u00a0<a href=\"https:\/\/www.cannabis.es\/pw\/2015\/03\/10\/riesgos-para-la-salud-del-consumo-de-cannabis-1\/\">1,<\/a>\u00a0<a href=\"https:\/\/www.cannabis.es\/pw\/2015\/04\/08\/riesgos-para-la-salud-del-consumo-de-cannabis-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">2<\/a>\u00a0y\u00a0<a href=\"https:\/\/www.cannabis.es\/pw\/2015\/04\/28\/riesgos-para-la-salud-del-consumo-de-cannabis-3\/\" target=\"_blank\" rel=\"noreferrer noopener\">3<\/a>.<\/p>\n\n\n\n<p><strong>6.- Riesgo de muerte por intoxicaci\u00f3n aguda:<\/strong><\/p>\n\n\n\n<p>A nivel f\u00edsico el cannabis se caracteriza por una toxicidad aguda extraordinariamente baja; las consecuencias de una sobredosificaci\u00f3n pueden ser notables en cuanto a los efectos psicol\u00f3gicos pero la probabilidad de morir o padecer secuelas f\u00edsicas graves tras una intoxicaci\u00f3n de cannabis es casi nula. Para conocer la toxicidad de cualquier f\u00e1rmaco o droga se consideran datos de experimentaci\u00f3n animal. La LD50 se define como la dosis de una sustancia capaz de matar al 50% de una muestra de animales de experimentaci\u00f3n. En el caso del cannabis la LD-50 est\u00e1 entre 1:20.000-1:40.000 (<em>Young, 1988<\/em>). Extrapolando estos datos, te\u00f3ricamente ser\u00eda necesario administrar m\u00e1s de 600 kilos de marihuana en un tiempo de 15 minutos a una persona para provocar su muerte por intoxicaci\u00f3n.<\/p>\n\n\n\n<p>Este argumento suele utilizarse para se\u00f1alar la seguridad del cannabis. Sin embargo conviene considerarlo en su justa medida. La muerte por intoxicaci\u00f3n aguda por cannabis parece improbable pero ya hemos se\u00f1alado que los riesgos de cualquier sustancia est\u00e1n en funci\u00f3n sobre todo del individuo que las consume y el contexto que los utiliza. El hecho de que el cannabis tenga un margen de seguridad elevado a nivel org\u00e1nico \u00fanicamente quiere decir eso. No implica que sea una droga mejor que otras, o que no tenga riesgos, sino que la muerte por intoxicaci\u00f3n no es uno de ellos.<\/p>\n\n\n\n<p><strong>7.- Cannabis y conducci\u00f3n:<\/strong><\/p>\n\n\n\n<p>Los efectos neuropsicol\u00f3gicos del cannabis mencionados en el cap\u00edtulo anterior pueden tener repercusi\u00f3n a la hora de conducir veh\u00edculos. Las investigaciones que han explorado esta relaci\u00f3n son de muy distinto tipo.<\/p>\n\n\n\n<p>Algunos estudios han examinado, en condiciones de laboratorio, los efectos del cannabis en algunas de las habilidades utilizadas a la hora de conducir un veh\u00edculo (seguimiento, atenci\u00f3n, tiempo de reacci\u00f3n, memoria a corto plazo, vigilancia, coordinaci\u00f3n ojo-mano, concentraci\u00f3n, toma de decisiones) (<em>Kelly et al, 2004<\/em>). En general, los resultados indican que muchas de estas habilidades se ven afectadas tras haber consumido cannabis de una forma dosis-dependiente.&nbsp;<br>Otro tipo de estudios han utilizado simuladores de conducci\u00f3n y voluntarios a quienes se administran cantidades variables de cannabis para conocer sus efectos (<em>Ramaekers et al 2011, Ronen et al 2008<\/em>) . En general, la capacidad para conducir un veh\u00edculo se ve afectada aunque de forma menor que en los estudios en condiciones de laboratorio. Se cree que esto puede ser debido en parte a que los conductores compensan conscientemente los efectos del cannabis, es decir, a que son m\u00e1s conscientes de estar bajo los efectos de un psicoactivo y, por tanto, realizan las pruebas con mayor prudencia (<em>Kelly et al, 2004<\/em>).<\/p>\n\n\n\n<p>Otros estudios han estudiado la relaci\u00f3n entre el uso habitual de cannabis y el riesgo de accidentes. Los resultados son contradictorios; algunos autores s\u00ed han encontrado esta relaci\u00f3n, mientras que otros en los que se han controlado variables como el sexo o el comportamiento arriesgado durante la conducci\u00f3n, no han conseguido demostrar esta relaci\u00f3n (<em>McLaren et al, 2007; Blows et al 2005; Fergusson et al 2001<\/em>).<\/p>\n\n\n\n<p>La cuesti\u00f3n es muy compleja, ya que los efectos en una persona concreta depender\u00e1n de la cantidad de cannabis consumida, su tolerancia y factores de tipo individual. El riesgo parece m\u00e1s elevado durante las dos primeras horas despu\u00e9s de haber consumido y decrece despu\u00e9s (<em>Pulido et al, 2011<\/em>). Un metaan\u00e1lisis calcula que una concentraci\u00f3n de THC de 7-10 ng\/ml supondr\u00eda un riesgo de accidente similar al de dosis medias de alcohol (0.05%) (<em>Grotenhermer et al, 2007<\/em>), aunque se trata de una revisi\u00f3n estad\u00edstica que es dif\u00edcilmente aplicable a situaciones pr\u00e1cticas reales.<\/p>\n\n\n\n<p>A nivel legal resulta t\u00e9cnicamente muy complicado interpretar un resultado positivo en un test de detecci\u00f3n de cannabis. No es sencillo discriminar entre el consumo reciente (estar bajo los efectos de la sustancia) y un consumo m\u00e1s antiguo. Pero desde una perspectiva de reducci\u00f3n de riesgos, la conducci\u00f3n de veh\u00edculos es una actividad que puede afectar potencialmente a terceros, por lo que siempre deber\u00eda realizarse en condiciones psicof\u00edsicas \u00f3ptimas. Por este motivo, la conducci\u00f3n de veh\u00edculos de motor, manejo de maquinaria pesada u otras actividades que impliquen potenciales consecuencias negativas para otras personas est\u00e1n formalmente desaconsejadas.<br><br><br><strong>Referencias:<\/strong><\/p>\n\n\n\n<p>Aldington S, Harwood M, Cox B, Weatherall M, Beckert L, Hansell A et al.&nbsp;<strong>Cannabis use and risk of lung cancer: a case-control study<\/strong>.Eur Respir J. 2008 Feb;31(2):280-6<\/p>\n\n\n\n<p>Ammenheuser MM, Berenson AB, Babiak AE, Singleton CR, Whorton EB Jr.&nbsp;<strong>Frequencies of hprt mutant lymphocytes in marijuana-smoking mothers and their newborns<\/strong>. Mutat Res 1998;403:55-64.<\/p>\n\n\n\n<p>Berthiller J, Straif K, Boniol M, Voirin N, Benha\u00efm-Luzon V, Ayoub WB et al.&nbsp;<strong>Cannabis smoking and risk of lung cancer in men: a pooled analysis of three studies in Maghreb<\/strong>. J Thorac Oncol. 2008 Dec;3(12):1398-403<\/p>\n\n\n\n<p>Blows, S., Ivers, R.Q., Connor, J., Ameratunga, S., Woodward, M., &amp; Norton, R. (2005).&nbsp;<strong>Marijuana use and car crash injury<\/strong>. Addiction 100, 605-611.<\/p>\n\n\n\n<p>Cadilcott DG, Holmes J Robert-Thompson KJ, Holmes C&nbsp;<strong>Keep off the grass: marijuana use and acute cardiovascular events<\/strong>. Eur J Emerg Med. 2005 Oct;12(5):236-44<\/p>\n\n\n\n<p>Combemale P, Consort T, Denis-Thelis L, Estival JL, Dupin M, Kanitakis J. Cannabis arteritis. Br J Dermatol. 2005 Jan;152(1):166-9.<\/p>\n\n\n\n<p>de Pasquale A, Costa G, Trovato A.&nbsp;<strong>The influence of cannabis on glucoregulation<\/strong>.Bull Narc. 1978 Jul-Sep;30(3):33-41.<br>Division of mental health and prevention of substance abuse. World Health Organization.&nbsp;<strong>Cannabis: a health perspective and research agenda<\/strong>. WHO\/MSA\/PSA\/97. OMS: Ginebra, 1997.<\/p>\n\n\n\n<p>Drug Enforcement Administration, 1988 Documento on line:&nbsp;<a href=\"http:\/\/cannabis-science.com\/content\/DEA%20Ruling%20Judge%20Young.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/cannabis-science.com\/content\/DEA%20Ruling%20Judge%20Young.pdf<\/a><\/p>\n\n\n\n<p>Fergusson, D.M. &amp; Horwood, L.J. (2001).<strong>&nbsp;Cannabis use and traffic accidents in a birth cohort of young adults<\/strong>. Accident Analysis &amp; Prevention 33, 703-711.<\/p>\n\n\n\n<p>Fried PA, Watkinson B.&nbsp;<strong>36- and 48-month neurobehavioral follow-up of children prenatally exposed to marijuana, cigarettes, and alcohol<\/strong>. J Dev Behav Pediatr 1990;11:49-58.<\/p>\n\n\n\n<p>Grotenhermen, F., Leson, G., Berghaus, G., Drummer, O.H., Kr\u00fcger, H-P, Longo, M., et al. (2007).<strong>&nbsp;Developing limits for driving under cannabis<\/strong>. Addiction 102, 1910-1917.<\/p>\n\n\n\n<p>Hall W, Solowij N, Lemon J.&nbsp;<strong>The Health and Psychological Consequences of Cannabis Use<\/strong>. National Drug Strategy Monograph Series No. 25. Canberra: Australian Government Publishing Service, 1994.<\/p>\n\n\n\n<p>House of Lords Select Committee on Science and Technology.<strong>&nbsp;Cannabis. The scientific and medical evidence<\/strong>. London: The Stationery Office, 1998.<\/p>\n\n\n\n<p>Jones RT.&nbsp;<strong>Cardiovascular system effects of marijuana<\/strong>. J Clin Pharmacol. 2002 Nov;42(11 Suppl):58S-63S.<\/p>\n\n\n\n<p>Kelly, E., Darke, S. &amp; Ross, J. (2004).&nbsp;<strong>A review of drug use and driving: Epidemiology, impairment, risk factor and risk perceptions<\/strong>. Drug and Alcohol Review 23, 319-344.<\/p>\n\n\n\n<p>McLaren, J. &amp; Mattick, R.P. (2007).&nbsp;<strong>Cannabis use in Australia: Use, supply, harms, and responses<\/strong>. Monograph No. 57. Sydney: National Drug and Alcohol Research Centre.<\/p>\n\n\n\n<p>Murphy L.&nbsp;<strong>Hormonal system and reproduction<\/strong>. In: Grotenhermen F, Russo E, eds. Grotenhermen, F., Russo, E. (eds.):&nbsp;<strong>Cannabis and cannabinoids. Pharmacology, toxicology, and therapeutic potential<\/strong>. Haworth Press, Binghamton\/New York 2001, in press.<\/p>\n\n\n\n<p>Murphy LL, Gher J, Steger RW, Bartke A.&nbsp;<strong>Effects of delta 9- tetrahydrocannabinol on copulatory behavior and neuroendocrine responses of male rats to female conspecifics<\/strong>. Pharmacol Biochem Behav 1994;48:1011-7.<\/p>\n\n\n\n<p>Pulido, J., Barrio, G., Lardelli, P., Bravo, M.J., Brugal, M.T., Espelt, A., et al. (2011).&nbsp;<strong>Cannabis use and traffic injuries<\/strong>. Epidemiology 22, 609-610.<\/p>\n\n\n\n<p>Ramaekers, J.G., Moeller, M.R., Theunissen, E.L. &amp; Kauert, G.F. (2011).&nbsp;<strong>Validity of three experimental performance tests for predicting risk of cannabis induced road crashes<\/strong>. In. Fisher, D.L., Rizzo, M., Caird, J.K. &amp; Lee, J.D., (Eds). Handbook of Driving Simulation for Engineering, Medicine and Psychology CRC Press; 2011. p. 45.1-45.8.<\/p>\n\n\n\n<p>Ronen, A., Gershon, P., Drobiner, H., Rabinovich, A., Bar-Hamburger, R., Mechoulam, R., et al. (2008).<strong>&nbsp;Effects of THC on driving performance, physiological state and subjective feelings relative to alcohol<\/strong>. Accident Analysis &amp; Prevention 40, 926-934.<\/p>\n\n\n\n<p>Roth MD, Arora A, Barsky SH, Kleerup EC, Simmons M, Tashkin DP.&nbsp;<strong>Airway inflammation in young marijuana and tobacco smokers<\/strong>. Am J Respir Crit Care Med 1998;157:928-37.<\/p>\n\n\n\n<p>Tetrault JM, Crothers K, Moore BA, Mehra R, Concato J, Fiellin DA.&nbsp;<strong>Effects of marijuana smoking on pulmonary function and respiratory complications: a systematic review<\/strong>. Arch Intern Med. 2007 Feb 12;167(3):221-8.<\/p>\n\n\n\n<p>Treinen KA, Sneeden JL, Heindel JJ.&nbsp;<strong>Specific inhibition of FSH stimulated cAMP accumulation by delta 9 tetrahydrocannabinol in cultured rat granulosa cells<\/strong>. Toxicol Appl Pharmacol 1993; 118;53-7.<\/p>\n\n\n\n<p>Wenger T, Croix D, Tramu G, Leonardelli J.&nbsp;<strong>Marijuana and reproduction. Effects on puberty and gestation in female rats. Experimental results<\/strong>. Ann Endocrinol (Par\u00eds) 1992;53:37-43.<\/p>\n\n\n\n<p><strong>Young LF Oppinion and recommended fuling, findings of fact, conclusions of law an decision of administrative lay judge on rescheduling marijuana<\/strong>. United States Department of Law.<\/p>\n","protected":false},"excerpt":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Tiempo de lectura:<\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutos<\/span><\/span>Por Dr. Fernando Caudevilla \u00daltima entrega de la serie de art\u00edculos del&nbsp;Dr. Fernando Caudevilla&nbsp;sobre los riesgos para la salud asociados al consumo de cannabis. Puedes encontrar los cap\u00edtulos anteriores siguendo los links:\u00a01,\u00a02\u00a0y\u00a03. 6.- Riesgo de muerte por intoxicaci\u00f3n aguda: A nivel f\u00edsico el cannabis se caracteriza por una toxicidad aguda extraordinariamente baja; las consecuencias de [&hellip;]","protected":false},"author":1,"featured_media":4554,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"loftocean-featured-post":"","loftocean_post_format_gallery":"","loftocean_post_format_gallery_ids":"","loftocean_post_format_gallery_urls":"","loftocean_post_format_video_id":"","loftocean_post_format_video_url":"","loftocean_post_format_video_type":"","loftocean_post_format_video":"","loftocean_post_format_audio_type":"","loftocean_post_format_audio_url":"","loftocean_post_format_audio_id":"","loftocean_post_format_audio":"","loftocean_post_format_quote_text":"","loftocean_post_format_quote_byline":"","loftocean_post_format_link_text":"","loftocean_post_format_link_url":"","ceramag_post_header_style":"","ceramag_enable_background_video":"","ceramag_show_in_top_slider":"","ceramag_post_background_video_start":"","ceramag_post_background_video_end":"","loftocean_page_background_video_id":"","loftocean_page_background_video_url":"","loftocean_page_background_video_type":"","loftocean_page_background_video":"","ceramag_background_video_start":"","ceramag_background_video_end":"","ceramag_single_page_hide_header":"","footnotes":""},"categories":[36,35],"tags":[41,51],"class_list":["post-4553","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-medicinal","category-politica-y-sociedad","tag-cannabis","tag-salud"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>RIESGOS PARA LA SALUD DEL CONSUMO DE CANNABIS (4)<\/title>\n<meta name=\"description\" content=\"Entrada &#8226; 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