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Martin, Roy C.; Gaston, Tyler E.; Thompson, Matthew; Ampah, Steve B.; Cutter, Gary; Bebin, E. Martina; Szaflarski, Jerzy P.
Epilepsy & behavior, August 2019, 2019-08-00, 20190801, Letnik: 97Journal Article
Cognitive dysfunction is a common comorbidity in adults with treatment-resistant epilepsy (TRE). Recently, cannabidiol (CBD) has demonstrated efficacy in epilepsy treatment. However, our understanding of CBD's cognitive effects in epilepsy is limited. We examined long-term cognitive effects of CBD in adults with TRE as part of an ongoing prospective, open-label safety study. Twenty-sevenadults with TRE (mean age: 34SD +14, female 52%) enrolled in the UAB CBD program completed standardized cognitive testing (NIH Toolbox Cognition Battery (NIHTB-CB)) at pre-CBD administration baseline and at one-yearfollow-up. Participants were receiving stable CBD dose at the time of one-year testing (mean=36.5mg/kg/day). The NIHTB-CB consisted of two global composite scales (Fluid and Crystallized) and seven individual tests measuring aspects of working memory, episodic memory, executive function, processing speed, and language. All participants had recorded Chalfont Seizure Severity Scale (CSSS) scores at each visit. Statistical analyses consisted of t-test, Pearson correlation coefficient, and linear regression. At baseline, cognitive test performance was below average for both global composite scales (Fluid: 71 ±18 range: 46–117) and Crystallized (76 ±15 range: 59–112). Longitudinal analysis revealed no significant group change across the two global composite scales. Of the seven individual cognitive tests, none changed significantly over time. No correlation was found between the cognitive change scores and CBD dose (all P's≥0.21). Change in cognitive test performance was not associated change in seizure severity rating. These findings are encouraging and indicate that long-term administration of pharmaceutical grade CBD is overall cognitively well-tolerated in adults with TRE. •Overall, cannabidiol (CBD) was cognitively well tolerated at time of one-year study visit.•Modest cognitive change occurred on two of seven individual cognitive tasks (one modest improvement, one modest decline).•Neither CBD dose at time of one-year visit nor seizure severity change was significantly associated with one-year performance across the cognitive measures.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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