BGG 492 as an adjunctive treatment in patients with partial‐onset seizures: A 12‐week, randomized, double‐blind, placebo‐controlled, phase II dose‐titration study with an open‐label extension
Author(s) -
Elger Christian E.,
Hong Seung Bong,
Brandt Christian,
Mancione Linda,
Han Jackie,
Strohmaier Christine
Publication year - 2017
Publication title -
epilepsia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.687
H-Index - 191
eISSN - 1528-1167
pISSN - 0013-9580
DOI - 10.1111/epi.13771
Subject(s) - tolerability , placebo , medicine , adverse effect , randomized controlled trial , somnolence , anesthesia , placebo controlled study , confidence interval , cohort , double blind , alternative medicine , pathology
Summary Objectives To evaluate dose–response relationship of BGG 492 as add‐on therapy to 1–3 antiepileptic drugs in patients with partial‐onset seizures and to investigate safety and tolerability of BGG 492. Methods This was a 12‐week, randomized, double‐blind, placebo‐controlled, phase II dose‐titration study (core study) with a 30‐week, flexible‐dose, open‐label extension. In the core study, patients were randomized (1:2) to placebo or BGG 492 100 mg t.i.d. in cohort 1, and in cohort 2 patients were randomized (1:4) to placebo or BGG 492 150 mg t.i.d . On completion of the core study, eligible patients entered the extension study. Primary outcome measures were total partial seizure frequency per 28 days (core study) and safety and tolerability (extension study). Results Overall, 93 patients were randomized (150 mg [n = 44]; 100 mg [n = 24]; placebo [n = 25]), and 81 (87.1%) completed the core study. Fifty‐one patients entered and 43 (84.3%) completed the extension study. In the core study, no statistically significant dose–response trend among the BGG 492 treatment groups (100 and 150 mg) was observed at the 4‐week double‐blind maintenance period (weeks 7–10); however, there was higher percent reduction in total partial seizure frequency in the BGG 492 150 mg over placebo groups (37.32%; 95% confidence interval [CI] −18.90, 66.95). Dizziness, somnolence, and fatigue were the most common adverse events ( AE s), higher in the BGG 492 150 mg group than in the 100 mg and placebo groups (dizziness: 14 [31.8%] vs. 3 [12.5%] and 1 [4.0%]; somnolence: 7 [15.9%] vs. 1 [4.2%] and 1 [4.0%]; fatigue: 5 [11.4%] vs. 1 [4.2%] and 1 [4.0%]). During the open‐label extension study, 39 (76.5%) patients on BGG 492 had AE s, and the most commonly experienced AE s were dizziness (14 [27.5%]) and somnolence (9 [17.6%]). Significance There was no significant dose–response trend in the BGG 492 treatment groups (100 and 150 mg); however, higher percent reduction over placebo was observed in the BGG 492 150 mg group. Safety and tolerability data were consistent with the known safety profile for BGG 492, and no new safety risks were identified.