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      Situación actual de Cannabis sativa, beneficios terapéuticos y reacciones adversas Translated title: Current status of Cannabis sativa; therapeutic benefits and adverse reactions

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          Abstract

          RESUMEN Introducción: En la actualidad, uno de los temas más polémicos que involucra en gran proporción al campo de la Medicina es el uso terapéutico de la marihuana y su legalización. Esta planta de reconocimiento milenario ha desatado en las últimas décadas disímiles de controversias dado el descubrimiento del sistema endocannabinoide que revolucionó la investigación sobre ella. Objetivo: Describir la situación actual del cannabis, sus beneficios terapéuticos y sus efectos adversos. Material y métodos: Se realizó una exhaustiva búsqueda y revisión empleando los Descriptores en Ciencias de la Salud, en idioma inglés y español, consultando las bases de datos Pubmed, Scielo, Lilacs, Cochrane Library y Web of Science, para los últimos 10 años, empleándose un total de 45 artículos como referencias bibliográficas. Desarrollo: Al Cannabis se le han atribuido efectos farmacológicos, tales como: antinociceptivo, antiepiléptico, inmunosupresivo, antiemético, estimulante del apetito, antimicrobiano, antiinflamatorio y neuroprotector. A su vez, presenta disímiles reacciones adversas como son la predisposición a varios tipos de cáncer, empeoramiento de desórdenes mentales, dificultades en el aprendizaje y el rendimiento escolar, que constituye una droga portera, entre otros. A pesar de las tendencias legalizadoras no son suficientes las razones para la legalización de esta droga, cuando su principal blanco resulta ser los adolescentes, donde los daños neurológicos que causa son irreversibles. Conclusiones: Se debe continuar explorando las potencialidades terapéuticas de los cannabinoides a partir de la elaboración de productos farmacológicos bien dosificados y controlados, pues el riesgo de sus efectos adversos es innegable y contundente.

          Translated abstract

          ABSTRACT Introduction: Currently, one of the most controversial issues that greatly involves the medical field is the therapeutic use and legalization of marijuana. This millennial recognition has led to different controversies in recent decades due to the discovery of the endocannabinoid system which has revolutionized the process of research on this topic. Objective: To describe the current situation of cannabis, its therapeutic benefits and adverse effects. Material and methods: An in-depth search and review was carried out using Health Sciences descriptors in English and Spanish. A search was carried out in PubMed, SciELO, Lilacs, Cochrane Library and Web of Science databases. Publications from the last 10 years were consulted, using a total of 45 articles as bibliographic references. Development: Some pharmacological effects such as antinociceptive, antiepileptic, immunosuppressive, antiemetic, appetite stimulant, antimicrobial, anti-inflammatory and neuroprotective ones have been attributed to Cannabis. In turn, it presents dissimilar adverse reactions such as predisposition to various types of cancer, worsening of mental disorders, and difficulties with learning and school performance. Cannabis, among others, is considered a starter drug. Despite the trend towards legalization, there are not enough reasons for the legalization of this drug. Its main target turns out to be the adolescents, among which the neurological damage it causes is irreversible. Conclusions: The therapeutic potential of cannabinoids should continue to be explored from the production of well dosed and controlled pharmacological products, since the risk of their adverse effects are undeniable and overwhelming.

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          Most cited references44

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          Cannabinoids for Medical Use: A Systematic Review and Meta-analysis.

          Cannabis and cannabinoid drugs are widely used to treat disease or alleviate symptoms, but their efficacy for specific indications is not clear.
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            Cannabis in painful HIV-associated sensory neuropathy: a randomized placebo-controlled trial.

            To determine the effect of smoked cannabis on the neuropathic pain of HIV-associated sensory neuropathy and an experimental pain model. Prospective randomized placebo-controlled trial conducted in the inpatient General Clinical Research Center between May 2003 and May 2005 involving adults with painful HIV-associated sensory neuropathy. Patients were randomly assigned to smoke either cannabis (3.56% tetrahydrocannabinol) or identical placebo cigarettes with the cannabinoids extracted three times daily for 5 days. Primary outcome measures included ratings of chronic pain and the percentage achieving >30% reduction in pain intensity. Acute analgesic and anti-hyperalgesic effects of smoked cannabis were assessed using a cutaneous heat stimulation procedure and the heat/capsaicin sensitization model. Fifty patients completed the entire trial. Smoked cannabis reduced daily pain by 34% (median reduction; IQR = -71, -16) vs 17% (IQR = -29, 8) with placebo (p = 0.03). Greater than 30% reduction in pain was reported by 52% in the cannabis group and by 24% in the placebo group (p = 0.04). The first cannabis cigarette reduced chronic pain by a median of 72% vs 15% with placebo (p < 0.001). Cannabis reduced experimentally induced hyperalgesia to both brush and von Frey hair stimuli (p < or = 0.05) but appeared to have little effect on the painfulness of noxious heat stimulation. No serious adverse events were reported. Smoked cannabis was well tolerated and effectively relieved chronic neuropathic pain from HIV-associated sensory neuropathy. The findings are comparable to oral drugs used for chronic neuropathic pain.
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              Systematic review: efficacy and safety of medical marijuana in selected neurologic disorders: report of the Guideline Development Subcommittee of the American Academy of Neurology.

              To determine the efficacy of medical marijuana in several neurologic conditions. We performed a systematic review of medical marijuana (1948-November 2013) to address treatment of symptoms of multiple sclerosis (MS), epilepsy, and movement disorders. We graded the studies according to the American Academy of Neurology classification scheme for therapeutic articles. Thirty-four studies met inclusion criteria; 8 were rated as Class I. The following were studied in patients with MS: (1) Spasticity: oral cannabis extract (OCE) is effective, and nabiximols and tetrahydrocannabinol (THC) are probably effective, for reducing patient-centered measures; it is possible both OCE and THC are effective for reducing both patient-centered and objective measures at 1 year. (2) Central pain or painful spasms (including spasticity-related pain, excluding neuropathic pain): OCE is effective; THC and nabiximols are probably effective. (3) Urinary dysfunction: nabiximols is probably effective for reducing bladder voids/day; THC and OCE are probably ineffective for reducing bladder complaints. (4) Tremor: THC and OCE are probably ineffective; nabiximols is possibly ineffective. (5) Other neurologic conditions: OCE is probably ineffective for treating levodopa-induced dyskinesias in patients with Parkinson disease. Oral cannabinoids are of unknown efficacy in non-chorea-related symptoms of Huntington disease, Tourette syndrome, cervical dystonia, and epilepsy. The risks and benefits of medical marijuana should be weighed carefully. Risk of serious adverse psychopathologic effects was nearly 1%. Comparative effectiveness of medical marijuana vs other therapies is unknown for these indications.
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                Author and article information

                Journal
                rhcm
                Revista Habanera de Ciencias Médicas
                Rev haban cienc méd
                Universidad de Ciencias Médicas de la Habana (La Habana, , Cuba )
                1729-519X
                December 2020
                : 19
                : 6
                : e2992
                Affiliations
                [2] La Habana La Habana orgnameUniversidad de Ciencias Médicas de La Habana orgdiv1Facultad de Ciencias Médicas “Comandante Manuel Fajardo” Cuba
                [3] La Habana orgnameHospital Clínico Quirúrgico “Comandante Manuel Fajardo” Cuba
                [1] La Habana La Habana orgnameUniversidad de Ciencias Médicas de La Habana orgdiv1Facultad de Ciencias Médicas “Finlay Albarrán” Cuba
                Article
                S1729-519X2020000700008 S1729-519X(20)01900600008
                3c29019e-81f9-43ec-9b4c-a7da03316133

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 22 July 2020
                : 29 September 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 45, Pages: 0
                Product

                SciELO Cuba

                Categories
                CIENCIAS CLÍNICAS Y PATOLÓGICAS

                Abuso de la marihuana,marijuana use,marijuana,Cannabis dependence,Cannabis sativa,Cannabinoids,Marijuana abuse,uso de la marihuana,marihuana,dependencia al Cannabis,Cannabinoides

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