The clinical features and functional impact of valproate-induced tremor
The clinical features and functional impact of valproate-induced tremor
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DOI:
10.1016/j.parkreldis.2017.09.011
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发表时间:
2017-11-01
影响因子:
4.1
通讯作者:
Fidel Baizabal-Carvallo, Jose
中科院分区:
文献类型:
--
作者:
Alonso-Juarez, Marlene;Torres-Russotto, Diego;Fidel Baizabal-Carvallo, Jose
Background: Tremor is a known side-effect of anticonvulsants, particularly of valproate. However, there is a dearth of information regarding detailed clinical features and functional impact of valproate-induced tremor.Methods: We studied a cohort of patients treated with anticonvulsants for neurological disorders, through blinded evaluations using the Clinical Rating Scale for Tremor (CRST); we compared the frequency, severity and functional impact of drug-induced tremor between, patients treated with valproate and those treated with other anticonvulsants.Results: From a cohort of 218 consecutive patients, 171 were fully evaluated; 118 patients were taking valproate alone or combined with other anticonvulsants and 53 patients were taking other anticonvulsants. Mean age (+/- SD) at evaluation of the cohort was 32 +/- 13 years, females represented 55.6% of cases. Tremor was more frequently observed in patients taking valproate particularly postural upper limb tremor: 49% vs. 15% (right-side) (P < 0.001) and 48.3% vs. 13.2% (left-side), (P < 0.001); had a higher total CRST score: 12.14 vs. 3.06 (P < 0.001), and required more frequently treatment for drug-induced tremor: 23.7% vs. 5.6% (P=0.005) compared with patients taking other anticonvulsants. Among 118 patients taking valproate, women had a higher total CRST score compared with men: 14.54 +/- 14.9 vs. 9.56 +/- 9.55 (P=0.034). A weak correlation between the total CRST score, dose per Kg of valproate and serum levels of valproate were observed.Conclusions: Tremor is frequently observed in patients taking valproate and is severe enough to require treatment in about 24% of cases. (C) 2017 Elsevier Ltd. All rights reserved.