[What is the optimal dose for the prophylactic treatment of chronic migraine patients?].

Abstract:

INTRODUCTION:OnabotulinumtoxinA (OnabotA) is indicated for headache prophylaxis in patients with chronic migraine. However, there is some controversy about what is the minimum effective dose for treating chronic migraine patients. AIM:To determine the optimal dose of OnabotA for the prophylactic treatment of patients with chronic migraine. DEVELOPMENT:We performed a literature review of the randomized, double blind, placebo-controlled studies that have evaluated the safety and efficacy of OnabotA as headache prophylactic treatment in migraine patients. In the studies conducted before the PREEMPT clinical programme, a variety of dose ranges and infiltration paradigms were used. Initial phase II studies of OnabotA in chronic daily headache showed that those patients treated with 150 U had significant mean reductions from baseline in headache frequency compared with placebo, and this benefit was not observed for patients treated with 75 U. The experience from previous studies allowed to define an injection paradigm and dose range (155-195 U) that was used in the PREEMPT clinical trials. PREEMPT studies demonstrate that OnabotA is a safe an effective prophylactic treatment for chronic migraine. CONCLUSIONS:Available evidence to date supports that the optimal dose for the treatment of chronic migraine patients is the use of at least 150 U of OnabotA, that should be administered according to the PREEMPT injection paradigm. TITLE:Realmente es beneficioso usar las dosis de OnabotulinumtoxinA del estudio PREEMPT? :Introduccion. La OnabotulinumtoxinA (OnabotA) esta indicada para el tratamiento preventivo de los pacientes con diagnostico de migraña cronica. Existe cierta controversia acerca de cual es la dosis minima eficaz de OnabotA. Objetivo. Determinar cual es la dosis mas adecuada de OnabotA para el tratamiento de la migraña cronica. Desarrollo. Se revisan los estudios controlados frente a placebo, que han evaluado la eficacia y seguridad de OnabotA para el tratamiento de la migraña, prestando especial atencion a las dosis de toxina utilizadas. En los diferentes ensayos clinicos llevados a cabo antes del año 2010 se utilizaron distintos protocolos de infiltracion. La experiencia obtenida de los estudios previos permitio definir un protocolo de infiltracion que se utilizo en el programa PREEMPT, y que demostro que el tratamiento con OnabotA es seguro y eficaz en pacientes con migraña cronica. La dosis elegida en los ensayos PREEMPT 1 y 2 fue de 155-195 U, al observarse en los estudios en fase II que la dosis de 75 U no era eficaz y que la utilizacion de 150-200 U aumentaba la eficacia sin incrementar los efectos adversos. Ademas de la dosis, el paradigma de inyeccion PREEMPT tambien establece de manera detallada los puntos de inyeccion y la metodologia de infiltracion. Conclusiones. La evidencia cientifica disponible hasta la fecha sustenta que la dosis mas adecuada para el tratamiento de la migraña cronica es la utilizacion de al menos 150 U de OnabotA, y que la infiltracion debe realizarse con la metodologia definida en el paradigma de inyeccion PREEMPT.

journal_name

Rev Neurol

journal_title

Revista de neurologia

authors

Irimia P,Esteve-Belloch P,Murie-Fernandez M,Martinez-Vila E

subject

Has Abstract

pub_date

2014-03-10 00:00:00

pages

S13-9

eissn

0210-0010

issn

1576-6578

pii

rn2014024

journal_volume

58 Suppl 2

pub_type

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