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Effect of ketamine combined with magnesium sulfate in neuropathic pain patients (KETAPAIN): study protocol for a randomized controlled trial.

Effect of ketamine combined with magnesium sulfate in neuropathic pain patients (KETAPAIN): study protocol for a randomized controlled trial.
Author Information (click to view)

Delage N, Morel V, Picard P, Marcaillou F, Pereira B, Pickering G,


Delage N, Morel V, Picard P, Marcaillou F, Pereira B, Pickering G, (click to view)

Delage N, Morel V, Picard P, Marcaillou F, Pereira B, Pickering G,

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Trials 2017 11 0318(1) 517 doi 10.1186/s13063-017-2254-3
Abstract
BACKGROUND
Neuropathic pain is difficult to treat, and the efficacy of recommended drugs remains limited. N-methyl-D-aspartate receptors are implicated, and antagonists are a pharmacological option. Ketamine is widely used in French pain clinics, but without consensus or recommendations. Furthermore, the association of ketamine with magnesium has been poorly studied. The aim of the present study is to evaluate the benefit of ketamine with or without magnesium in refractory neuropathic pain.

METHODS/DESIGN
A randomized, double-blind, crossover, placebo-controlled study will be performed in Clermont-Ferrand University Hospital, Clermont-Ferrand, France. The aim is to evaluate the effect of ketamine with or without magnesium in 22 patients with neuropathic pain. Intravenous ketamine/placebo, ketamine/magnesium sulfate, or placebo/placebo will be administered consecutively to each patient, in random order, once at 5-week intervals. The primary endpoint is the AUC of pain intensity assessed on a 0-10 Numeric Pain Rating Scale for a 5-week period. Data analysis will be performed on an intention-to-treat basis, and all statistical tests (except primary analysis) will be performed with an α risk of 5% (two-sided).

DISCUSSION
Considering the poor efficacy of the drugs available for neuropathic pain, ketamine with or without magnesium sulfate may be a valuable therapeutic option that needs to be standardized.

TRIAL REGISTRATION
EudraCT number- 2015-000142-29 . Registered on April 9, 2015; version 1.4.

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