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Outcomes from a Spanish Expanded Access Program on cannabidiol treatment in pediatric and adult patients with epilepsy. | LitMetric

AI Article Synopsis

  • - The study aimed to assess how effective and tolerable cannabidiol (CBD) is for patients with severe epilepsy disorders, particularly Dravet syndrome (DS) and Lennox-Gastaut syndrome (LGS), through a program in Spain.
  • - A retrospective analysis was conducted on 102 patients, who were mostly resistant to other treatments, showing significant reductions in seizure frequency and severity over 12 months of CBD treatment.
  • - Notable improvements in quality of life were also recorded, with a 21.2% increase in the CAVE scale scores, indicating that CBD can be beneficial for patients suffering from these epilepsy syndromes.

Article Abstract

Aim: To evaluate the effectiveness and tolerability of cannabidiol (CBD) in patients with developmental and epileptic encephalopathies, including Dravet syndrome (DS), and Lennox-Gastaut syndrome (LGS), in a Spanish Expanded Access Program (EAP).

Methods: This was a multicenter, retrospective, observational study of patients treated with purified CBD in 14 hospitals across Spain. Patients with (1) written informed consent and (2) at least 6 months follow-up before the closure of the database were included. Primary effectiveness endpoints included reductions (100 %, ≥75 %, ≥50 %, ≥25 %, or 0 %) or worsening in seizure frequency (all seizure types and most disabling seizures) at 1-, 3-, 6-, and 12-month visits and at the last visit, and median relative seizure reduction between baseline and last visit. Secondary effectiveness endpoints included retention rate, reduction in seizure severity, status epilepticus, healthcare utilization, and quality of life. Primary safety endpoints included rates of adverse events (AEs) and AEs leading to discontinuation.

Results: One hundred and two patients (DS 12 %; LGS 59 %; other epilepsy syndromes 29 %) with a mean age of 15.9 years were enrolled. Patients were highly refractory to antiseizure medications (ASMs); mean number of prior failed ASMs was 7.5 (SD 3.7). The mean CBD dose was 13.0 mg/kg/day at the last visit. The proportion of patients with ≥50 % reduction in the total number of seizures from baseline was 44.9 % at 6 months and 38.9 % at 12 months. The median number of total seizures per month reduced by 47.6 % from baseline to the last visit. At 12 months, seizure severity was lower in 33/54 patients (61.1 %) and unchanged in 17/54 patients (31.5 %). Quality of life, based on the CAVE scale, increased from a mean score of 17.9 ± 4.7 (n = 54) at baseline to 21.7 ± 5.5 (n = 51) at the last patient visit (21.2 % improvement). The mean treatment retention time was 10.3 months. There were no statistically significant changes in the number of status epilepticus episodes, but lower healthcare utilization was observed. Adverse events occurred in sixty-eight patients (66.7 %), and the most common were somnolence (34.3 %) and diarrhea (12.7 %). Cannabidiol was discontinued exclusively due to AEs in 7.8 % of patients, increasing to 25.5 % when both lack of efficacy and AEs were considered together.

Conclusions: Cannabidiol demonstrated promising effectiveness and tolerability in patients with developmental and epileptic encephalopathies taking part in a Spanish EAP.

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Source
http://dx.doi.org/10.1016/j.yebeh.2022.108958DOI Listing

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