Uso de antipsicóticos en los pacientes con demencia en España: comparación con la prescripción de los inhibidores de la acetilcolinesterasa y de la memantina, y análisis de las asociaciones / Use of antipsychotics in patients with dementia in Spain: Comparison with prescription of acetylcholinesterase inhibitors and memantine and analysis of associations

Objetivo: Se ha analizado la prevalencia de antipsicóticos, inhibidores de la acetilcolinesterasa (IACE) y memantina en pacientes con demencia en España y la influencia de estas asociaciones en su prescripción. Método: Estudio descriptivo, retrospectivo y transversal de la base BIFAP de 2017 en los mayores de 65 años con demencia. Se recogieron las prescripciones de antipsicóticos, los IACE y la memantina. Para los antipsicóticos también se recogieron, la duración del tratamiento y el tiempo desde el diagnóstico de demencia, al de prescripción. Resultados: Se recuperaron 1.327.792 sujetos, 89.464 (6,73%) con demencia. El 31,76% tuvieron prescritos antipsicóticos; los más frecuentes: quetiapina (58,47%), risperidona (21%) y haloperidol (19,34%). Las prescripciones de IACE y memantina fueron más frecuentes en los menores de 84 años y las de antipsicóticos en los mayores de 85 años (p<0,001). Los antipsicóticos se mantuvieron una media de 1.174,5 días. En el 26,4% de los casos se prescribieron aislados, OR: 0,61 (IC 95%: 0,59-0,62), en el 35,85% asociados a IACE, OR: 1,26 (IC 95%: 1,22-1,30) y en el 42,4% a memantina, OR: 1,69 (IC 95%: 1,62-1,78); p<0,000). Desde el diagnóstico de demencia transcurrieron de 461 días (±1.576,5) cuando se prescribieron aislados; 651 días (±1.574,25) asociados a IACE y 1.224 (±1.779) a memantina. Conclusiones: Una tercera parte de los pacientes con demencia tuvieron prescritos antipsicóticos, mayoritariamente atípicos, más frecuentemente en los mayores de 85 años y durante periodos prolongados. La prescripción de IACE y memantina se asoció al incremento del riesgo de uso de antipsicóticos, pero paradójicamente, a la prolongación del tiempo hasta su prescripción.(AU)

ObjectiveWe have analyzed the prevalence of antipsychotics in patients with dementia in Spain, their age distribution and the influence of treatment with IACEs and memantine on their prescription. Method: Descriptive, retrospective and cross-sectional study of the 2017 BIFAP database in over 65 years of age with dementia. Prescriptions of antipsychotics, IACEs and memantine were collected. For antipsychotics were also collected, the duration of treatment and time from dementia diagnosis to prescription. Results: A total of 1,327,792 subjects were retrieved, 89,464 (6.73%) with dementia. Antipsychotics were prescribed in 31.76%; by frequency: quetiapine (58.47%), risperidone (21%) and haloperidol (19.34%). Prescriptions of IACEs and memantine were clustered in those younger than 84 years and antipsychotics in those older than 85 (P<.001). Antipsychotics were maintained for a mean of 1174.5 days. In 26.4% of cases they were prescribed alone, OR 0.61 (95% CI: 0.59-0.62), in 35.85% associated with IACEs, OR 1.26 (95% CI: 1.22-1.30) and in 42.4% with memantine, OR 1.69 (95% CI: 1.62-1.78) (P<.000). From the diagnosis of dementia, 461 days (±1576.5) elapsed when isolated drugs were prescribed; 651 days (±1574.25) associated with IACEs and 1224 (±1779) with memantine. Conclusions: One third of patients with dementia were prescribed antipsychotics, mostly atypical, more frequently in those older than 85 years and for prolonged periods. IACEs and memantine were associated with the risk of antipsychotic prescription, but paradoxically, with prolonged time to onset.(AU)

[Use of antipsychotics in patients with dementia in Spain: Comparison with prescription of acetylcholinesterase inhibitors and memantine and analysis of associations]. / Uso de antipsicóticos en los pacientes con demencia en España: comparación con la prescripción de los inhibidores de la acetilcolinesterasa y de la memantina, y análisis de las asociaciones.

OBJECTIVE: We have analyzed the prevalence of antipsychotics in patients with dementia in Spain, their age distribution and the influence of treatment with IACEs and memantine on their prescription. METHOD: Descriptive, retrospective and cross-sectional study of the 2017 BIFAP database in over 65 years of age with dementia. Prescriptions of antipsychotics, IACEs and memantine were collected. For antipsychotics were also collected, the duration of treatment and time from dementia diagnosis to prescription. RESULTS: A total of 1,327,792 subjects were retrieved, 89,464 (6.73%) with dementia. Antipsychotics were prescribed in 31.76%; by frequency: quetiapine (58.47%), risperidone (21%) and haloperidol (19.34%). Prescriptions of IACEs and memantine were clustered in those younger than 84 years and antipsychotics in those older than 85 (P<.001). Antipsychotics were maintained for a mean of 1174.5 days. In 26.4% of cases they were prescribed alone, OR 0.61 (95% CI: 0.59-0.62), in 35.85% associated with IACEs, OR 1.26 (95% CI: 1.22-1.30) and in 42.4% with memantine, OR 1.69 (95% CI: 1.62-1.78) (P<.000). From the diagnosis of dementia, 461 days (±1576.5) elapsed when isolated drugs were prescribed; 651 days (±1574.25) associated with IACEs and 1224 (±1779) with memantine. CONCLUSIONS: One third of patients with dementia were prescribed antipsychotics, mostly atypical, more frequently in those older than 85 years and for prolonged periods. IACEs and memantine were associated with the risk of antipsychotic prescription, but paradoxically, with prolonged time to onset.

Prevalencia de la prescripción de fármacos en la enfermedad de Alzheimer y uso de la terapia combinada / Prescription drug prevalence in Alzheimer's disease and use of combination therapy

Objetivo: La enfermedad de Alzheimer (EA) es la demencia más común, y se estima que alrededor de 47 millones de personas a nivel mundial sufren esta enfermedad. Los inhibidores de la acetilcolinesterasa (IACE) y la memantina están indicados en estadios leve-moderado, pero su relevancia clínica está en entredicho y el uso de la terapia combinada no se ha establecido. El objetivo es medir la prevalencia de prescripción de fármacos para la EA en un Área de Gestión Sanitaria (AGS) y analizar tanto la utilidad de la biterapia como su potencial retirada. Metodología: Estudio retrospectivo desarrollado por el Servicio de Farmacia de un AGS que abarca 408.788 pacientes. Los datos se recogieron utilizando diferentes plataformas electrónicas del Servicio Andaluz de Salud. Se incluyeron todos los pacientes con prescripción activa de algún fármaco para la EA. Resultados: El 0,6% de la población total del AGS tenía prescrito uno o más fármacos para la EA. Los más prescritos fueron memantina y donepezilo tanto en monoterapia como combinados. Aproximadamente un 40% de los pacientes con terapia combinada sufrieron un deterioro cognitivo desde la instauración de la doble terapia, pero los fármacos no se retiraron. Conclusión: La prevalencia de prescripción de fármacos para la EA en el AGS estudiada es similar a los datos de prevalencia publicados. Desde el inicio de la prescripción de la terapia combinada hasta la última consulta médica, un porcentaje relevante de pacientes sufre deterioro cognitivo, pero los fármacos no se retiran, por lo que es necesario revisar las pautas de deprescripción de estos medicamentos. (AU)

Objective: Alzheimer’s disease (AD) is the most common dementia, and it is estimated that around 47 million people worldwide suffer this disease. Acetylcholinesterase inhibitors (AChEi) and memantine are indicated in mild-moderate stages, but their clinical relevance is questioned and the use of the combination therapy has not been established. The objective is to evaluate the prevalence of drug prescription for AD in a Health Management Area (HMA) and to analyze the utility of the dual therapy and its potential withdrawal. Methodology: Retrospective study developed by the Pharmacy Service of an HMS that includes 408,788 patients. Data were collected using different electronic platforms of the Andalusian Health Service. All patients with an active prescription of some drug for AD were included. Results: 0.6% of the total population of the HMS had prescribed one or more drugs for AD. The most prescribed were memantine and donepezil, both in monotherapy and in combination. Approximately 40% of patients with combination therapy suffered cognitive decline since the introduction of dual therapy, but the drugs were not withdrawn. Conclusion: The prevalence of drug prescription for AD in the HMS studied is similar to the published prevalence data. From the start of the combination therapy prescription until the last medical consultation, a relevant percentage of patients suffer cognitive impairment, but the drugs are not withdrawn, so it is necessary to review the deprescription guidelines. (AU)

Therapeutic role of memantine for the prevention of cognitive decline in cancer patients with brain metastasis receiving whole-brain radiotherapy: a narrative review / Papel terapêutico da memantina na prevenção do declínio cognitivo em pacientes com câncer com metástase cerebral recebendo radioterapia cerebral total: uma revisão narrativa

ABSTRACT. Brain metastases are the most common central nervous system tumors. The mainstay treatment for this tumor in low to middle income countries is whole brain radiation therapy. Irreversible cognitive decline is associated with the use of whole brain radiotherapy. Several pharmacologic and nonpharmacologic options have been employed in studies focusing on the prevention of cognitive decline following whole-brain radiation therapy. Memantine use has been shown to provide some benefit in reducing the rate of decline in cognitive function and time to cognitive failure. The objective of this review article is to provide a summary on available primary literature on the therapeutic role of memantine for the prevention of cognitive decline in cancer patients with brain metastasis receiving whole brain radiotherapy.

RESUMO. As metástases cerebrais são os tumores mais comuns do sistema nervoso central. O tratamento principal para este tumor em países de baixa e média renda é a radioterapia de cérebro inteiro. O declínio cognitivo irreversível está associado ao uso de radioterapia cerebral total. Várias opções farmacológicas e não farmacológicas têm sido empregadas em estudos com foco na prevenção do declínio cognitivo após radioterapia de cérebro inteiro. O uso de memantina demonstrou fornecer algum benefício na redução da taxa de declínio na função cognitiva e no tempo até a falha cognitiva. O objetivo deste artigo de revisão foi fornecer um resumo da literatura primária disponível sobre o papel terapêutico da memantina para a prevenção do declínio cognitivo em pacientes com câncer com metástase cerebral recebendo radioterapia cerebral total.

Eficácia e segurança de Pregabalina, Gabapentina, Memantina, Amitriptilina, treinamento físico com exercícios em solo ou aquáticos para tratamento de Fibromialgia: revisão rápida de evidências / Effectiveness and safety of Pregabalin, Gabapentin, Memantine, Amitriptyline, exercises on land or aquatic exercises for Fibromyalgia treatment: rapid evidence review

Tecnologia: Pregabalina, drogas não-opioides disponíveis no SUS, treinamento físico no solo ou em meio aquático. Indicação: Tratamento da fibromialgia. Pergunta: Há diferenças de eficácia e segurança entre a Pregabalina e as outras drogas não opioides ou terapias disponíveis no SUS para tratamento da dor crônica relacionada à fibromialgia? Métodos: Levantamento bibliográfico foi realizado nas bases eletrônicas PUBMED e Cochrane Database, seguindo estratégias de buscas predefinidas, com busca adicional na página eletrônica da Comissão Nacional de Incorporação de Tecnologias em Saúde. Avaliou-se a qualidade metodológica das revisões sistemáticas com Assessing the Methodological Quality of Systematic Reviews versão 2 (AMSTAR-II). Resultados: Foram selecionadas e incluídas 6 revisões sistemáticas. Conclusão: A afirmação de eficácia da Gabapentina, Amitriptilina e Memantina para tratamento da fibromialgia é pouco confiável, pois as evidências são de nível 3, provenientes de ensaios clínicos de baixa qualidade metodológica. Pregabalina é eficaz para reduzir a dor em curto prazo (risco absoluto é 50%, nível 1 de evidência), mas não em longo prazo. O treinamento físico, relatado como única estratégia eficaz para tratamento da fibromialgia nas diretrizes do SUS, não tem efeito clinicamente importante sobre a dor

Technology: Pregabalin, non-opioid drugs available in Brazilian Public Health System, aquatic exercise or exercise on land. Indication: Treatment of fibromyalgia. Question: Are there differences in efficacy and safety between Pregabalin and other non-opioid drugs or therapies available in the SUS for the treatment of chronic pain related to fibromyalgia? Methods: A bibliographic survey was carried out in the electronic databases PUBMED and Cochrane Database, following pre-defined search strategies, with an additional search on the website of the National Commission for the Incorporation of Health Technologies. The methodological quality of systematic reviews was evaluated with Assessing the Methodological Quality of Systematic Reviews version 2 (AMSTAR-II). Results: Six systematic reviews were selected and included. Conclusion: There is not confidence about effectiveness of Gabapentin, Amitriptyline and Memantine for fibromyalgia treatment (level 3 of evidence, from clinical trials of low methodological quality). Pregabalin, in the short term, is effective for reducing pain (absolut risk is 50%, level 1 of evidence), but not in the long term. Physical training, reported as the only effective strategy for treating fibromyalgia in Brazilian Public Health System guidelines, has no clinically important effect on pain.

Memantina para el tratamiento de pacientes con demencia tipo Alzheimer moderada a severa / Memantine for the treatment of patients with dementia type Moderate to severe Alzheimer's

INTRODUCCIÓN: Este documento técnico se realiza a solicitud del Instituto Nacional de Salud Mental "Honorio Delgado ­ Hideyo Noguchi"; la cual motivó la realización de la pregunta PICO por parte de médicos y especialistas de la siguiente manera, P: Pacientes con demencia tipo Alzheimer moderada a severa; I: Memantina; C: donepezilo, galantamina, rivastigmina o memantina+donepezilo; O: función cognitiva; actividades de la vida diaria; síntomas neuropsiquiátricos; eventos adversos y mortalidad. A. Cuadro clínico: La demencia tipo Alzheimer (DA) es la forma más común de demencia en personas de edad avanzada, representando aproximadamente dos tercios de los casos de demencia y entre un 60-70% de los casos de deterioro cognitivo progresivo en adultos mayores. En Perú se estima una prevalencia de 7,6% em población rural y 8,5% en población urbana mayor de 65 años. La combinación de terapia farmacológica y no farmacológica constituyen los pilares básicos de tratamiento. Los medicamentos aprobados para el tratamiento de la DA incluyen: donepezilo, rivastigmina, galantamina y memantina. B. Tecnología sanitária: Memantina es un antagonista de los receptores N-metil-D-aspartato indicado para el tratamiento de la demencia tipo Alzheimer moderada y severa, cuyo mecanismo de acción se postula que está basado em un efecto antagonista no competitivo de los receptores N-metil-D-aspartato cerebrales que participan em la transmisión de señales nerviosas relacionadas con la atención, el aprendizaje, la memoria y la conducta. Las reacciones adversas más comunes incluyen mareos, dolor de cabeza, confusión y estreñimiento. Cuenta con aprobación de la Food and Drug Administration (FDA) desde 2003 y de la European Medicines Agency (EMA) desde 2012, bajo la denominación comercial de Namenda®. Em Perú, cuenta con treinta y dos registros sanitarios vigentes y ocho registros sanitarios con vigência prorrogada provisional, bajo diferentes denominaciones comerciales y en presentación de tabletas de 5, 7, 10, 14 y 20 mg, y solución oral de 10 mg/ml. OBJETIVO: Describir la evidencia científica disponible sobre la eficacia y seguridad de memantina para el tratamiento de pacientes con demencia tipo Alzheimer moderada a severa. METODOLOGÍA: Se realizó una búsqueda sistemática en Medline (Pubmed), The Cochrane Library y LILACS utilizando la estrategia de búsqueda descrita en el Anexo 01. Ésta se complementó con la búsqueda de evidencia en páginas institucionales de agencias gubernamentales y buscadores genéricos. Se priorizó la identificación y selección de ensayos clínicos aleatorizados controlados, revisiones sistemáticas (RS) con o sin meta-análisis (MA) de ensayos clínicos aleatorizados controlados, guías de práctica clínica (GPC), evaluaciones de tecnología sanitaria (ETS) y evaluaciones económicas (EE) de América Latina. La calidad de la evidencia se valoró usando las siguientes herramientas: AMSTAR 2 para la valoración de la calidad de RS, la herramienta propuesta por la colaboración Cochrane para ensayos clínicos y AGREE II para valorar el rigor metodológico de las GPC. RESULTADOS: Se identificó tres revisiones sistemáticas (RS), cinco guías de práctica clínica (GPC) y una evaluación de tecnología sanitaria (ETS) que respondieron a la pregunta PICO de interés. CONCLUSIONES: En DA moderada a severa, memantina no fue superior a placebo para la mejora de la función cognitiva, actividades de la vida diaria, y reducción de síntomas neuropsiquiátricos. El perfil de seguridad de memantina fue similar a placebo e inhibidores de la acetilcolinesterasa como donepezilo, galantamina o rivastigmina. Una ETS recomienda considerar el uso de memantina para el tratamiento de la demencia tipo Alzheimer moderada en pacientes intolerantes o con contraindicación a inhibidores de la acetilcolinesterasa, y en la demencia tipo Alzheimer severa. Tres GPC incluyen el uso de memantina en demencia tipo Alzheimer moderada a severa, al igual que inhibidores de la acetilcolinesterasa. Una GPC recomienda el uso de memantina más un inhibidor de la acetilcolinesterasa en demencia tipo Alzheimer moderada a severa, mientras que otra GPC recomienda indistintamente el uso de inhibidores de la acetilcolinesterasa o memantina en monoterapia o terapia combinada, sin especificar el estadío de la enfermedad. Dos RS fueron consideradas como nivel de confianza medio, y la restante como nivel de confianza bajo. Cuatro GPC incluidas obtuvieron una puntuación superior al 80% en la valoración global de la calidad metodológica, mientras que la restante obtuvo una puntuación de 61%.

A systematic review of economic evaluations of the use of memantine alone or combined with donepezil for moderate to severe Alzheimer's disease / Revisão sistemática de avaliações econômicas acerca do uso da memantina isolada ou combinada com o donepezil para a doença de Alzheimer moderada a grave

OBJECTIVE: To synthesize the available evidence and state of the art of economic evaluations which evaluate the use of memantine, whether alone or combined with donepezil, for moderate to severe Alzheimer's disease (AD), focusing on the analytical decision models built. METHOD: The electronic databases MEDLINE, EMBASE, NHS EED, CEA Registry and LILACS were searched for references. After duplicates were removed, two independent reviewers evaluated the titles and abstracts and subsequently the full texts. The Drummond M. tool was used to evaluate the quality of the studies. RESULTS: After the application of the eligibility criteria, twelve complete economic evaluations were included. One evaluation was a clinical trial, two involved simulations and nine used Markov models. The main outcome measure adopted was dominated by cost per quality adjusted life year (QALY). The use of memantine was considered cost-effective and dominant in eight studies; while in a single study, its use was dominated when compared to donepezil for moderate AD. Sensitivity analyzes were systematically performed, with robust results. The quality assessment indicated that the methodological quality of the studies was good. CONCLUSION: Although there is some controversy regarding the benefits derived from the use of memantine, whether combined or not with donepezil, the evidence collected suggests that it is cost-effective in the countries where the studies were performed. However, local economic studies need to be performed, given the significant variability derived from the different parameters adopted in the evaluations.

OBJETIVO: Sintetizar as evidências disponíveis e o estado da arte das avaliações econômicas que avaliaram a memantina isolada ou combinada com donepezil para a Doença de Alzheimer (DA) moderada a grave, com foco nos modelos de decisão analíticos elaborados. MÉTODO: As bases eletrônicas MEDLINE, EMBASE, NHS EED, CEA Registry e LILACS foram usadas para busca de referências. Após a remoção de duplicatas, dois revisores independentes avaliaram os títulos e resumos e, posteriormente, os textos completos. A ferramenta de Drummond M. foi utilizada para avaliação da qualidade dos estudos. RESULTADO: Após a aplicação dos critérios de elegibilidade, foram incluídas doze avaliações econômicas completas. Quanto aos desenhos de estudo, uma avaliação foi conduzida ao longo de ensaio clínico, duas fizeram simulação e nove utilizaram modelos de Markov. A principal medida de desfecho adotada foi custo por ano de vida ajustado por qualidade (QALY). O uso da memantina foi considerada custo-efetivo e dominante em oito estudos; em um único estudo, seu uso foi dominado quando comparado ao donepezil para a DA moderada. Análises de sensibilidade foram sistematicamente realizadas, evidenciando resultados robustos. A avaliação de qualidade apontou boa qualidade metodológica dos trabalhos. CONCLUSÃO: Apesar de existirem controvérsias quanto aos benefícios derivados do uso da memantina associada ou não ao donepezil, o levantamento das evidências sugere que ela é custo-efetiva nos países onde os estudos foram elaborados. No entanto, estudos econômicos locais necessitam ser realizados, dada a grande variabilidade derivada dos diferentes parâmetros adotados nas avaliações.

Uso da memantina na doença de Alzheimer grave: análise de custo-efetividade na perspectiva do Sistema Único de Saúde / Use of memantine in severe Alzheimer's disease: a cost-effectiveness analysis from the perspective of the Brazilian Health System

A Doença de Alzheimer (DA) representa a causa mais comum de demência, sendo uma doença neurodegenerativa progressiva e incurável, expressa por uma diversidade de sintomas neuropsiquiátricos. É a principal responsável pelas taxas de mortalidade e de dependência funcional entre os idosos, representando um impacto econômico importante para as famílias e sistemas universais de saúde. Apesar da literatura observar que os efeitos da memantina na DA são pequenos, o fármaco foi incorporado ao Sistema Único de Saúde (SUS) em 2017. No entanto, ao contrário do preconizado pela normativa legal acerca da incorporação de tecnologias no SUS, este processo não foi acompanhado de uma avaliação econômica completa que demonstrasse a custo-efetividade deste fármaco. Este estudo examinou a custo-utilidade da memantina para a DA grave em comparação a nenhum tratamento farmacológico específico, sob a perspectiva do SUS como financiador da assistência. Foi conduzida uma revisão sistemática de estudos de avaliação econômica que usaram a memantina isolada ou combinada com doenepezilpara a DA moderada a grave. A revisão permitiu conhecer o estado da arte das avaliações econômicas e possibilitou levantar aspectos gerais relacionados às modelagens utilizadas nos estudos de forma a auxiliar na construção do modelo de decisão analítico conduzido no estudo de custo-efetividade. Foi construído um modelo de Markov para modelar a progressão da doença com base nos estados de gravidade da DA (leve, moderado e grave), definidos pelo Mini- Exame do Estado Mental (MEEM), acrescidos do estado morto. Foram considerados ciclos de 1 ano e o horizonte temporal adotado foi de 5 anos. Os custos da memantina foram considerados por 2 anos, porém os efeitos observados apenas ao longo do primeiro ano. Custos e benefícios foram descontados em 5%. Comparado com nenhum tratamento específico, a memantina representou um aumento nos custos do cuidado e nos ganhos obtidos em QALY. Os pacientes que usaram memantina tiveram um ganho de 3,080 QALY ao longo dos 5 anos simulados a um custo incremental de R$ 351.500,00 em valores já descontados, resultando em uma RCEI de R$ 114.205,75 por QALY, para o caso de referência. Os resultados encontrados são de difícil comparação com estudos realizados fora do país. Desta forma, sua incorporação não seria justificada no contexto nacional, dados seus custos elevados e um benefício pequeno e circunscrito ao tempo

Alzheimer's disease (AD) represents the most common cause of dementia, being a progressive and incurable neurodegenerative disease, expressed by a variety of neuropsychiatric symptoms. It the main responsible for mortality rates and functional dependence among the elderly, representing an economic impact important for families and universal health systems. Although the literature observes that the effects of memantine on AD are small, the drug was incorporated into the Brazilian Health System in 2017. However, contrary to the legal norm regarding the incorporation of technologies in SUS, this process was not accompanied by an economic evaluation that would demonstrate the cost-effectiveness of this drug. This study examined the cost-utility of memantine for severe AD compared to no specific pharmacological treatment, from the perspective of the SUS as a care funder. A systematic review of economic evaluation studies using memantine alone or in combination with donepezil for moderate to severe AD has been conducted. The review allowed to know the state of the art of economic evaluations and made it possible to raise general aspects related to the modeling used in the studies to assist in the construction of the analytical decision model conducted in the cost-effectiveness study. A Markov model was constructed to model the progression of AD based on the severity states of AD (mild, moderate and severe), defined by the MEEM, plus the dead state. Cycles of 1 year were considered and the adopted time horizon was 5 years. The costs of memantine were considered for 2 years, but the effects observed only during the first year. Costs and benefits were discounted at 5%. Compared with no specific treatment, memantine represented an increase in care costs and gains in QALY. Patients who used memantine had a gain 3,080 QALY over the simulated 5 years at an incremental cost of $ 351.500,00 and an ICER of $ 114.205,75 in amounts already discounted for the reference case. The results found are difficult to compare with studies conducted outside the country. If the cost-effectiveness threshold adopted in Brazil was previously recommended by the WHO, memantine would be considered a non-cost-effective technology based on the analysis of the reference case. In this way, its incorporation would not be justified in the national context, given its high costs and a small benefit and circumscribed to the time

[Pharmacological treatment]. / Terapias farmacológicas.

Alzheimer's disease (AD) is a chronic degenerative and inflammatory process leading to synapticdysfunction and neuronal death. A review about the pharmacological treatment alternatives is made: acetylcholinesterase inhibitors (AChEI), a nutritional supplement (Souvenaid) and Ginkgo biloba. A special emphasis on Ginkgo biloba due to the controversy about its use and the approval by the European Medicines Agency is made.

Rivastigmina parches sola o combinada con memantina, comparada con memantina sola en pacientes con enfermedad de Alzheimer moderada y severa: revisión sistemática de la literatura / Rivastigmine patches alone or combined with memantine compared with memantine alone in patients with moderate to severe Alzheimer's disease: Systematic review of the literature

Resumen Introducción: la enfermedad de Alzheimer (EA), una condición neurodegenerativa irreversible y progresiva, es la causa más frecuente de demencia y genera una gran carga económica anual. El objetivo de este estudio fue realizar una revisión sistemática de la literatura para determinar la seguridad y eficacia de rivastigmina parche, sola o en combinación con memantina, comparadas con la memantina en monoterapia para el tratamiento de la EA moderada y severa. Métodos: se realizó una búsqueda sistemática de la literatura. Se incluyeron estudios clínicos controlados aleatorizados de pacientes con diagnóstico de EA moderada a severa, evaluando los desenlaces de eficacia y seguridad. Resultados: los resultados de los estudios experimentales que comparan dosis de rivastigmina en parche, indican una posible diferencia en algunos desenlaces de eficacia, tales como desempeño de las actividades diarias, actividades instrumentales y funcionamiento general en pacientes con EA moderada y severa, sin diferencia significativa en los desenlaces de seguridad. Se observó una tendencia a favor de la terapia combinada en algunos desenlaces como cambio en puntuación de MMSE y actividades diarias instrumentales. Discusión: la evidencia disponible apoya el uso de rivastigmina, y la combinación con memantina parece una opción terapéutica apropiada en casos seleccionados.

Summary Introduction: Alzheimer's disease (AD), an irreversible, progressive neurodegenerative condition, is the most common cause of dementia and generates a high economic burden. The aim of this study was to conduct a systematic review of the literature to determine the safety and efficacy of rivastigmine patch, alone or in combination with memantine, compared with memantine monotherapy for the treatment of moderate to severe AD. Methods: A systematic search of the literature was conducted. Including randomized controlled trials of patients diagnosed with moderate to severe AD, evaluating outcomes of effectiveness and safety. Results: The results of experimental studies comparing doses of rivastigmine patches indicate a possible difference in some of the outcomes of effectiveness such as performance in activities of daily living, instrumental activities, and overall functioning, in patients with moderate and severe AD, without significant difference in safety outcomes. A trend in favor of combination therapy in some of the outcomes, as change in MMSE score and instrumental daily activities, was observed. Discussion: The available evidence supports the use of rivastigmine, and the association with memantine seems an appropriate therapeutic option in selected cases.

The effects of memantine on recovery, cognitive functions, and pain after propofol anesthesia / Efeitos da memantina sobre a recuperação, funções cognitivas e dor após a anestesia com propofol

Abstract Objectives: Postoperative cognitive dysfunction refers to the problems associated with thought and memory that are often experienced after major surgery. The aim of this study is to evaluate the effects of intraperitoneally administered memantine on recovery, cognitive functions, and pain after propofol anesthesia. Methods: The study was conducted in Gazi University Animal Research Laboratory, Ankara, Turkey in January 2012. Twenty-four adult female Wistar Albino rats weighing 170-270 g were educated for 300 s in the radial arm maze (RAM) over three days. Group P was administered 150 mg kg−1 of intraperitoneal (IP) propofol; Group M was given 1 mg kg−1 of IP memantine; and Group MP was given 1 mg kg−1 of IP memantine before being administered 150 mg kg−1 of IP propofol. The control group received only IP saline. RAM and hot plate values were obtained after recovery from the groups that received propofol anesthesia and 30 min after the administration of drugs in other two groups. Results: The duration of recovery for Group MP was significantly shorter than Group P (p < 0.001), and the number of entries and exits in the RAM by Group MP was significantly higher during the first hour when compared to Group P (p < 0.0001). Hot plate values, on the other hand, were found to be significantly increased in all groups when compared to the control values, aside from Group C (p < 0.0001). Conclusion: In this study, memantine provided shorter recovery times, better cognitive functions, and reduced postoperative pain. From this study, we find that memantine has beneficial effects on recovery, cognitive functions, and pain after propofol anesthesia.

Resumo Objetivos: A disfunção cognitiva no pós-operatório refere-se a problemas associados ao pensamento e à memória que são frequentemente manifestados após uma cirurgia de grande porte. O objetivo deste estudo foi avaliar os efeitos da memantina administrada por via intraperitoneal sobre a recuperação, as funções cognitivas e a dor após a anestesia com propofol. Métodos: O estudo foi feito no Laboratório de Pesquisa com Animais da Universidade de Gazi, Ankara, Turquia, em janeiro de 2012. Vinte e quatro ratos albinos do sexo feminino, adultos, da linhagem Wistar, com 170-270 g, foram treinados durante 300 segundos no labirinto radial de oito braços (LRB) durante três dias. O Grupo P recebeu 150 mg/kg−1 de propofol por via intraperitoneal (IP), o Grupo H recebeu 1 mg/kg−1 de memantina IP e o Grupo MP recebeu 1 mg/kg−1 de memantina IP antes da administração de 150 mg/kg−1 de propofol (IP). O grupo controle recebeu apenas solução salina IP. Os valores do LRB e da placa quente foram obtidos após a recuperação dos grupos que receberam propofol e 30 minutos após a administração dos fármacos nos outros dois grupos. Resultados: O tempo de recuperação do Grupo MP foi significativamente menor do que o do Grupo P (p < 0,001) e o número de entradas e saídas do LRB do Grupo MP foi significativamente maior durante a primeira hora, em comparação com o Grupo P (p < 0,0001). Os valores da placa quente, por outro lado, foram significativamente maiores em todos os grupos, em comparação com os valores do grupo controle, exceto pelo Grupo C (p < 0,0001). Conclusão: No presente estudo, memantina proporcionou tempos mais curtos de recuperação, funções cognitivas melhores e reduziu a dor no pós-operatório. A partir deste estudo, descobrimos que a memantina tem efeitos benéficos sobre a recuperação, as funções cognitivas e a dor após anestesia com propofol.

The effects of memantine on recovery, cognitive functions, and pain after propofol anesthesia.

OBJECTIVES: Postoperative cognitive dysfunction refers to the problems associated with thought and memory that are often experienced after major surgery. The aim of this study is to evaluate the effects of intraperitoneally administered memantine on recovery, cognitive functions, and pain after propofol anesthesia. METHODS: The study was conducted in Gazi University Animal Research Laboratory, Ankara, Turkey in January 2012. Twenty-four adult female Wistar Albino rats weighing 170-270g were educated for 300s in the radial arm maze (RAM) over three days. Group P was administered 150mgkg(-1) of intraperitoneal (IP) propofol; Group M was given 1mgkg(-1) of IP memantine; and Group MP was given 1mgkg(-1) of IP memantine before being administered 150mgkg(-1) of IP propofol. The control group received only IP saline. RAM and hot plate values were obtained after recovery from the groups that received propofol anesthesia and 30min after the administration of drugs in other two groups. RESULTS: The duration of recovery for Group MP was significantly shorter than Group P (p<0.001), and the number of entries and exits in the RAM by Group MP was significantly higher during the first hour when compared to Group P (p<0.0001). Hot plate values, on the other hand, were found to be significantly increased in all groups when compared to the control values, aside from Group C (p<0.0001). CONCLUSION: In this study, memantine provided shorter recovery times, better cognitive functions, and reduced postoperative pain. From this study, we find that memantine has beneficial effects on recovery, cognitive functions, and pain after propofol anesthesia.

[The effects of memantine on recovery, cognitive functions, and pain after propofol anesthesia]. / Efeitos da memantina sobre a recuperação, funções cognitivas e dor após a anestesia com propofol.

OBJECTIVES: Postoperative cognitive dysfunction refers to the problems associated with thought and memory that are often experienced after major surgery. The aim of this study is to evaluate the effects of intraperitoneally administered memantine on recovery, cognitive functions, and pain after propofol anesthesia. METHODS: The study was conducted in Gazi University Animal Research Laboratory, Ankara, Turkey in January 2012. Twenty-four adult female Wistar Albino rats weighing 170-270g were educated for 300s in the radial arm maze (RAM) over three days. Group P was administered 150mgkg(-1) of intraperitoneal (IP) propofol; Group M was given 1mgkg(-1) of IP memantine; and Group MP was given 1mgkg(-1) of IP memantine before being administered 150mgkg(-1) of IP propofol. The control group received only IP saline. RAM and hot plate values were obtained after recovery from the groups that received propofol anesthesia and 30min after the administration of drugs in other two groups. RESULTS: The duration of recovery for Group MP was significantly shorter than Group P (p<0.001), and the number of entries and exits in the RAM by Group MP was significantly higher during the first hour when compared to Group P (p<0.0001). Hot plate values, on the other hand, were found to be significantly increased in all groups when compared to the control values, aside from Group C (p<0.0001). CONCLUSION: In this study, memantine provided shorter recovery times, better cognitive functions, and reduced postoperative pain. From this study, we find that memantine has beneficial effects on recovery, cognitive functions, and pain after propofol anesthesia.

Papel da memantina no tratamento das perturbações da ansiedade: uma revisão baseada na evidência / The role of memantine in anxiety disorders: an evidence-based review

RESUMO Objetivo Avaliar a eficácia da memantina no tratamento das perturbações da ansiedade. Métodos Foi realizada uma revisão sistemática na Medline, outras bases de dados baseadas na evidência e Índex das Revistas Médicas Portuguesas, nos últimos 10 anos, em inglês, espanhol e português, utilizando os seguintes termos “MESH memantine”, “treatment” e “anxiety disorders”. Para avaliar a qualidade dos estudos e a força de recomendação, foi utilizada a escala de Strength of Recommendation Taxonomy da American Family Physician. Resultados Obtiveram-se 131 artigos, dos quais seis cumpriam os critérios de inclusão: dois ensaios clínicos aleatorizados e controlados (ECAC), uma revisão sistemática (RS), uma norma de orientação clínica (NOC) e dois ensaios clínicos não controlados (ECNC). A NOC não recomenda o uso de memantina no tratamento da perturbação generalizada da ansiedade (PGA) (SOR C), mas recomenda o uso da memantina como tratamento adjuvante de segunda linha na perturbação obsessivo-compulsiva (POC) e como terceira linha na perturbação do estresse pós-traumático (SORT C). Os dois ECAC sugerem que o tratamento adjuvante com memantina melhorou a sintomatologia dos pacientes com POC severa. A RS revelou que o uso da memantina tem alguns benefícios na diminuição dos sintomas da POC. Os dois ECNC sugerem que a memantina pode ser eficaz como tratamento adjuvante em pacientes sintomáticos apesar de tratamento adequado com antidepressivos convencionais. Conclusão A evidência atual sugere que o uso de memantina como adjuvante no tratamento da POC parece ser eficaz (SORT B). O uso de memantina no tratamento da PGA não é recomendado (SORT C).

ABSTRACT Objective Review the evidence on the efficacy of memantine in the treatment of the anxiety disorders. Methods A systematic review of articles published in the last ten years, in Portuguese, English and Spanish, was performed in Medline, other places of Evidence Medicine and Index of Portuguese Databases, using the following MESH terms: memantine, treatment and anxiety disorders. We used the Strength of Recommendation Taxonomy (SORT) scale of American Family Physician to assign levels of evidence and strength of recommendations. Results A total of 131 papers were identified, and after the application of inclusion criteria, 6 papers remained, including two randomized controlled trials (RCT), one clinical guideline (CG), two open clinical trials and one systematic review (SR). The CG does not recommend the use of memantine in the treatment of the generalized anxiety disorder (SORT C) but does recommend the use of memantine as second-line adjunctive therapy for obsessive compulsive disorder and as third-line therapy for post-traumatic stress (SORT C). The two RCT suggest that an add-on of memantine does improve the symptoms of patients suffering from severe obsessive compulsive disorder. The SR showed that the use of memantine had some benefit in relieving obsessive compulsive disorder symptoms. The two other studies showed memantine may be an effective augmentation therapy in patients with anxiety who remain symptomatic despite adequate treatment with conventional antidepressant anxiolytics. Conclusion The current available evidence suggests the benefit of memantine as an adjunctive therapy for the treatment for obsessive compulsive disorder (SORT B). Most studies does not show the benefit of the use of memantine for the treatment of generalized anxiety disorder (SORT C).

[Quality of registration of dementia diagnosis in primary care: The situation in Spain in 2002-2011]. / Calidad del registro del diagnóstico de demencia en atención primaria. La situación en España en el periodo 2002-2011.

OBJECTIVE: To ascertain the diagnosis associated with specific treatment for dementia in the Primary Care Electronic Clinical Record (PC-ECR) and to analyse the factors associated with the quality of registration. METHODS: Descriptive study of patients taking cholinesterase inhibitors or memantine registered in Database for pharmacoepidemiological research in PC (BIFAP) 2011: 24,575 patients between 2002 and 2011. Diagnoses associated with first prescription of these drugs were grouped into 5 categories: "dementia", "memory impairment", "dementia-related diseases", "intercurrent processes" and "convenience codes". We calculated the prevalence of each category by age and sex for each study year (95%CI) and analysed the associations and trend for 2002-2011 using difference in proportions in independent samples and binary logistic regression. RESULTS: A code of "dementia" was associated with first prescription in 56.5% (95%CI: 55.8-57.1) of patients. It was higher in women [OR1.09 (95%CI: 1.03-1.15)] and with increasing follow-up time [OR1.07 (95%CI: 1.06-1.08) for each year of follow-up]. "Convenience codes" [16.3% (95%CI: 15.8-16.7)] were coded more frequently in women and in those ≥80 years; "Memory impairment" [12.4% (95%CI: 12.0-12.8)], "related diseases" [4.6% (95%CI: 4.4-4.8)] and "intercurrent processes" [10.3% (95%CI: 9.9-10.6)] were used more in men and in persons <80 years. Between 2002 and 2011 improved the use of "convenience codes". CONCLUSIONS: Almost half of the patients taking cholinesterase inhibitors or memantine do not have a diagnosis of dementia registered in their PC-ECR. Registration improves with increasing time of follow-up. Improvements are needed in the PC-ECR, adequate care coordination, and proactive approach to increase the quality of dementia registration.

Intravitreal memantine retinal toxicity in rabbits.

OBJECTIVE: To histologically evaluate whether the intravitreal application of memantine produces retinal toxicity in rabbits. METHODS: A cross-sectional design, experimental, descriptive study was performed on 16 eyes of 16 New Zealand rabbits of 3 kg, divided in 4 groups of 4 rabbits. A dose of 70 ng/ml of intravitreal memantine was administered in Group A, a dose of 150 ng/ml in Group B, a dose of 400 ng/ml in Group C, and Group D received 1 ml of balanced salt solution. The injected eye of half of each group was enucleated 15 days after the injection, and the rest within 30 days after injection. Following enucleation, each eye was placed in 10% formaldehyde. Histopathological analysis was performed on all enucleated eyes. The animals were treated according to the guidelines of the Association for Research on Vision and Ophthalmology (ARVO). RESULTS: Groups A, B and D did not show any histopathological changes after their enucleation at 15 and 30 days. Group C showed changes in the photoreceptor layer after enucleation at 15 and 30 days. CONCLUSIONS: In our study, it was observed that memantine concentrations at 70 ng/ml and 150 ng/ml are safe when administered intravitreally; however, doses of 400 ng/ml produced retinal structural changes. This research should continue to assess its clinical usefulness.

Estimated prevalence of dementia based on analysis of drug databases in the Region of Madrid (Spain).

INTRODUCTION: The progressive rise in dementia prevalence increases the need for rapid methods that complement population-based prevalence studies. OBJECTIVE: To estimate the prevalence of dementia in the population aged 65 and older based on use of cholinesterase inhibitors and memantine. METHODS: Descriptive study of use and prescription of cholinesterase inhibitors and/or memantine in 2011 according to 2 databases: Farm@drid (pharmacy billing records for the Region of Madrid) and BIFAP (database for pharmacoepidemiology research in primary care, with diagnosis and prescription records). We tested the comparability of drug use results from each database using the chi-square test and prevalence ratios. The prevalence of dementia in Madrid was estimated based on the dose per 100 inhabitants/day, adjusting the result for data obtained from BIFAP on combination treatment in the general population (0.37%) and the percentage of dementia patients undergoing treatment (41.13%). RESULTS: Cholinesterase inhibitors and memantine were taken by 2.08% and 0.72% of Madrid residents aged 65 and older was respectively. Both databases displayed similar results for use of these drugs. The estimated prevalence of dementia in individuals aged 65 and older is 5.91% (95% CI%, 5.85-5.95) (52 287 people), and it is higher in women (7.16%) than in men (4.00%). CONCLUSIONS: The estimated prevalence of dementia is similar to that found in population-based studies. Analysing consumption of specific dementia drugs can be a reliable and inexpensive means of updating prevalence data periodically and helping rationalise healthcare resources.

Dementia drug consumption in the Basque Country between 2006 and 2011. / Consumo de medicamentos para el tratamiento de la demencia en la Comunidad Autónoma Vasca durante el periodo 2006-2011.

OBJECTIVE: We evaluated the consumption of specific medications for treating cognitive symptoms associated with AD and other types of dementia in individuals over 60 years of age between 2006 and 2011 in the Basque Country. METHODS: A retrospective descriptive study was conducted. The pharmacy division of the Basque Government Department of Health provided the prescribing data for the following drugs: donepezil, rivastigmine, galantamine, and memantine. The number of defined daily doses (DDDs) and the number of DDDs per 1000 inhabitants/day (DHD) were calculated. RESULTS: Consumption increased by 49.72% between 2006 and 2011. There were marked differences between drugs (13.02% donepezil; 93.18% rivastigmine; 37.79% galantamine; 70.40% memantine) and Basque provinces (16.34% in Áraba; 50.49% in Bizkaia; 57.37% in Gipuzkoa). Likewise, expenditure increased from €11.5 million in 2006 to € 18.1 million in 2011. CONCLUSIONS: This study shows increased consumption of these drugs, although there are also marked differences by province which may be due to differences in prescribing habits. Spending for these drugs rose parallel to this increase in consumption; drug prices remained stable throughout the study period.

Tratamiento farmacológico de la enfermedad de Alzheimer y otras demencias / Pharmacological therapy of Alzheimer’s disease and other dementias

El aumento de la expectativa de vida trae a consecuencia el incremento de las enfermedades crónicas en el adulto mayor, prevaleciendo entre ellas, las demencias. El tratamiento de las mismas requiere de un enfoque multidimensional, pero en esta oportunidad nos centraremos en el tratamiento farmacológico. Una vez establecido el diagnóstico de demencia, es adecuado iniciar el tratamiento con fármacos anticolinesterásicos y/o memantina según corresponda. Si bien estos fármacos no revierten los síntomas cognitivos, enlentecen la progresión de la enfermedad. Debemos tener en cuenta en principio, las contraindicaciones, interacciones medicamentosas y monitorizar la aparición de efectos adversos. Durante el seguimiento del paciente se deberán aplicar tests funcionales y cognitivos para evaluar la eficacia de llos medicamentos prescriptos. En la actualidad, están en estudio fármacos pretendidamente curativos cuyo blanco es la sustancia amiloide y la proteína tau.

Increased life expectancy brings a result, the increase of chronic diseases in the elderly, prevailing including dementia. Treating them requires a multidimensional approach. This time we will focus on pharmacological treatment of them. Once the diagnosis of dementia, it is appropriate to initiate treatment with acetylcholinesterase inhibitors and/or memantine accordingly. While these drugs do not reverse the cognitive symptoms, slow the progression of the disease. We should note in principle, contraindications, drug interactions and monitor the occurrence of adverse effects. During follow-up the patient must apply functional and cognitive tests to assess the effectiveness of prescription medicines. Currently under study are supposedly curative medicine that targets amyloid and tau protein.

Estudo de biodisponibilidade relativa para avaliação da farmacocinética de memantina associada a donepezila em voluntários sadios de ambos os sexos / Relative bioavailability study of pharmacokinetic evaluation of memantine associated with donepezil in healthy volunteers for both sexes

O estudo foi realizado para comparar a biodisponibilidade da associação em dose fixa de memantina 20 mg e donepezila 10 mg comprimido revestido (Aché Laboratórios Farmacêuticos S.A., formulação teste) e Ebix® 10 mg comprimido revestido (Lundbeck Brasil Ltda., formulação referência) e Eranz® 10 mg comprimido revestido (Wyeth Indústria Farmacêutica Ltda, formulação referência) em 36 voluntários de ambos os sexos. O estudo foi aberto, aleatorizado, 2-tratamentos, 2-sequências, 2-períodos, cruzado, dose única, nos quais um grupo de voluntários recebeu a formulação teste e outro as formulações de referências administradas concomitantemente. As amostras de sangue foram obtidas ao longo de um intervalo de 96 horas. As concentrações de memantina e donepezila foram determinadas através de espectrometria de massa (UPLC-MS-MS), utilizando amantadina e loratadina como padrão interno. A média geométrica de memantina associada a donepezila/Ebix® 10 mg foi de 98,75% para ASC0-t e 96,95% para "Cmáx". Os intervalos de confiança de 90% foram de 96,01%-101,58% e 93,50%-100,54%, respectivamente. A média geométrica de memantina associada a donepezila/Eranz® 10 mg foi de 92,03% para ASC0-t e 94,77% para "Cmáx". Os intervalos de confiança de 90% foram de 89,47%-94,67% e 88,22%-101,80%, respectivamente. Uma vez que os intervalos de confiança de 90% para "Cmáx" e ASC0-t estiveram dentro da faixa de 80%-125% proposta pelo FDA e pela ANVISA (Agência Nacional de Vigilância Sanitária do Brasil), conclui-se que o comprimido de memantina 20 mg associado a donepezila 10 mg foi bioequivalente à administração concomitante de dois comprimidos de Ebix® 10 mg e 1 comprimido de Eranz® 10 mg e, desta forma, o produto teste pode ser considerado intercambiável na prática médica.