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Effect of ketogenic diet and other dietary therapies on anti-epileptic drug concentrations in patients with epilepsy

Authors
 G. Heo  ;  S. H. Kim  ;  M. J. Chang 
Citation
 Journal of Clinical Pharmacy and Therapeutics, Vol.42(6) : 758-764, 2017 
Journal Title
 Journal of Clinical Pharmacy and Therapeutics 
Issue Date
2017
Keywords
anti-epileptic drug ; dietary therapy ; drug interaction ; ketogenic diet ; therapeutic drug monitoring
Abstract
WHAT IS KNOWN AND OBJECTIVE: The ketogenic diet (KD) is an effective high-fat, adequate-protein, low-carbohydrate diet for patients with refractory epilepsy. The aim of this study was to investigate the potential effects of the KD and other dietary therapies on the concentrations of anticonvulsants in patients with epilepsy. METHODS: Patients with epilepsy who were treated with the KD and other dietary therapies for more than 30 days with at least one measurement performed both before and during the diet were evaluated. The mean serum concentrations and the mean serum concentrations per weight per daily dose per bioavailability (F) of anti-epileptic drugs (AEDs) before and during the treatment were assessed. We also compared the rates of events out of reference ranges of the AEDs between before and during the KD and other dietary therapies. We compared the serum albumin, alanine transaminase and aspartate transaminase data of patients with valproic acid before and during the KD. RESULTS AND DISCUSSION: One-hundred thirty-nine patients including 81 male patients were enrolled. The median age of the patients was 2.91 (0.15-15.46) years. The median duration of the dietary therapies was 153 (35-2307) days. After the dietary therapies, the serum concentrations of carbamazepine, lamotrigine, levetiracetam, topiramate and valproic acid decreased, whereas that of phenobarbital slightly increased. However, statistical significance was found only with valproic acid (67.07±25.89 μg/mL vs 51.00±20.19 μg/mL, P<.05). The serum concentrations per weight per daily dose per drug F significantly decreased for valproic acid (1.38±1.39×10-2 vs 0.82±0.82×10-2 μg d mL-1 F-1 ) and phenobarbital (6.66±7.20×10-2 vs 4.75±4.07×10-2 μg d mL-1 F-1 , P<.05). The rate of occurrence of events out of reference ranges significantly increased with valproic acid (36.08% vs 57.23%, P<.05). WHAT IS NEW AND CONCLUSIONS: Most anti-epileptic drug serum concentrations remained stable during the KD and other related dietary therapies except those of valproic acid. Therefore, serum concentrations of valproic acid should be monitored when the KD and other dietary therapies are concomitantly administered.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/161327
DOI
10.1111/jcpt.12578
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Pediatrics (소아청소년과학교실)
Yonsei Authors
김세희(Kim, Se Hee)
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Full Text
https://onlinelibrary.wiley.com/doi/abs/10.1111/jcpt.12578
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