Brazilian Journal of Anesthesiology
https://app.periodikos.com.br/journal/rba/article/doi/10.1016/j.bjane.2018.08.002
Brazilian Journal of Anesthesiology
Scientific Article

Effect of melatonin on the daytime sleepiness side-effect of gabapentin in adults patients with neuropathic pain

Efeito da melatonina sobre o efeito colateral de sonolência diurna da gabapentina em pacientes adultos com dor neuropática

Basak Altiparmak; Hemra Cil; Nalan Celebi

http://dx.doi.org/10.1016/j.bjane.2018.08.002 Braz J Anesthesiol, vol.69, n2, p.137-143, 2019
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Abstract

Abstract Background and objectives: Gabapentin is an antiepileptic drug. Widely used for the management of neuropathic pain. Although it is known to be well tolerated, somnolence and dizziness are the most frequent adverse effects. In this study, we aimed to evaluate the effect of melatonin on daytime sleepiness side effect of gabapentin, sleep quality and pain intensity of patients with neuropathic pain. Methods: Patients suffering from "neuropathic pain" and planed to receive gabapentin therapy were randomly divided into two groups. Group 1 received melatonin 3 mg and gabapentin 900 mg orally, group 2 received matching placebo capsule and gabapentin 900 mg. The Epworth Sleepiness Scale, the Pittsburgh sleep quality index for assessment of sleep quality and Verbal Rating Scale were completed at the 0th, 10th and 30th days of treatment. Additive analgesic drug requirements were recorded. Results: Eighty patients were enrolled to the study; age, gender, ratio of additive analgesic consumption, baseline Epworth Sleepiness Scale, Pittsburg Sleep Quality index and Verbal Rating Scale scores were similar between the groups. Epworth Sleepiness Scale scores, Pittsburgh sleep quality index scores and Verbal Rating Scale scores in Group 1 were significantly lower than group 2 at the 10th day of treatment (p = 0.002, p = 0.003, p = 0.002 respectively). At the 30th day of treatment, Epworth Sleepiness Scale scores and Verbal Rating Scale scores were significantly lower in Group 1 (p = 0.002, p = 0.008 respectively). However, Pittsburgh sleep quality index scores did not significantly differ between the groups (p = 0.0566). Conclusions: Melatonin supplementation rapidly and significantly improved daytime sleepiness side-effect of gabapentin, however sleep quality of the patients with neuropathic pain was similar between groups.

Keywords

Gabapentin, Melatonin, Neuropathic pain, Sleep

Resumo

Resumo Justificativa e objetivos: Gabapentina é um agente antiepiléptico, amplamente utilizado para o tratamento da dor neuropática. Embora conhecida por ser bem-tolerada, sonolência e tontura são os seus efeitos adversos mais frequentes. Neste estudo, nosso objetivo foi avaliar o efeito da melatonina sobre o efeito colateral de sonolência diurna da gabapentina, a qualidade do sono e a intensidade da dor em pacientes com dor neuropática. Métodos: Os pacientes que sofriam de "dor neuropática" e com prescrição para receber terapia com gabapentina foram divididos aleatoriamente em dois grupos. O Grupo 1 recebeu 3 mg de melatonina e 900 mg de gabapentina por via oral, o Grupo 2 recebeu uma cápsula de placebo correspondente e 900 mg de gabapentina. A escala de sonolência de Epworth (ESS), o índice de qualidade do sono de Pittsburgh para avaliação da qualidade do sono (PSQI) e a escala de avaliação verbal (VRS) foram aplicados nos dias 0, 10 e 30 de tratamento. A necessidade de medicamentos analgésicos adicionais foi registrada. Resultados: Oitenta pacientes foram incluídos no estudo; idade, sexo, quantidade de analgésico adicional consumida e os escores basais de ESS, PSQI e VRS foram semelhantes entre os grupos. Os escores ESS, PSQI e VRS do Grupo 1 foram significativamente menores que os do Grupo 2 no décimo dia de tratamento (p = 0,002, p = 0,003, p = 0,002, respectivamente). No trigésimo dia de tratamento, os escores ESS e VRS foram significativamente menores no Grupo 1 (p = 0,002, p = 0,008, respectivamente). No entanto, os escores PSQI não diferiram significativamente entre os grupos (p = 0,0566). Conclusões: A suplementação de melatonina melhorou de forma rápida e significativa o efeito colateral de sonolência diurna da gabapentina, mas a qualidade do sono dos pacientes com dor neuropática foi semelhante entre os grupos.

Palavras-chave

Gabapentina, Melatonina, Dor neuropática, Sono

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