Drug updated on 12/11/2024
Dosage Form | Tablet (oral; 10 mg, 20 mg); suspension (oral; 2.5 mg/mL) |
Drug Class | Benzodiazepines |
Ongoing and Completed Studies | ClinicalTrials.gov |
Indication
- Indicated for the adjunctive treatment of seizures associated with Lennox-Gastaut syndrome (LGS) in patients 2 years of age or older.
Latest News
Summary
- This summary is based on the review of six systematic review(s)/meta-analysis(es). [1-6]
- Reduction in Drop Seizures: High-dose clobazam (CLB_H, 1.0 mg/kg/day) was associated with a ≥50% reduction in drop seizure frequency compared to placebo (odds ratio (OR): 4.9; 95% confidence interval (CI): 2.3-10.8), with 78% (95% CI: 70-85%) showing reduction in long-term treatment. High-dose cannabidiol (CBD_H, 20 mg/kg/day) also achieved a ≥50% reduction (OR: 3.8; 95% CI: 1.6-9.0), with 96% (95% CI: 95-98%) showing long-term reduction in seizures.
- Overall Seizure Frequency Reduction and Responder Rate: Cannabidiol (CBD) treatment resulted in a reduction in primary seizure frequency in patients with Lennox-Gastaut syndrome (LGS) (treatment ratio: 0.70 [95% CI: 0.62-0.80]) and DS (0.71 [95% CI: 0.60-0.83]). The 50% responder rate OR for CBD was 2.51 (95% CI: 1.69-3.71) with clobazam and 2.40 (95% CI: 1.38-4.16) without clobazam.
- Comparative Effectiveness with Other Drugs: Rufinamide (RFM) and lamotrigine (LTG) both showed high-certainty evidence of a 50% or greater seizure reduction compared to placebo, with RFM benefiting 202 more people per 1000 (CI: 34-567) and LTG benefiting 176 more per 1000 (CI: 30-434).
- Treatment-Emergent Adverse Events (TEAEs): High-dose CBD showed significantly higher odds for any TEAEs (OR: 3.8; 95% CI: 1.6-9.0) with a long-term TEAE frequency of 96% (95% CI: 95-98%). High-dose clobazam showed high-certainty evidence for adverse events leading to study discontinuation, with 106 more people per 1000 affected (CI: 0 to 538 more) when used as an add-on therapy.
- Specific Adverse Events: CBD was commonly associated with somnolence, decreased appetite, diarrhea, and increased serum aminotransferases, with higher somnolence and sedation in patients also on clobazam.
- Studies included pediatric and adult populations with Lennox-Gastaut Syndrome (LGS) and Dravet Syndrome (DS), with specific evaluations of CBD use both with and without clobazam; CBD showed efficacy in both settings, though higher rates of somnolence and sedation were observed in patients combining CBD with clobazam.
Product Monograph / Prescribing Information
Document Title | Year | Source |
---|---|---|
Onfi (clobazam) Prescribing Information. | 2024 | Lundbeck, Deerfield, IL |
Systematic Reviews / Meta-Analyses
Document Title | Year | Source |
---|---|---|
Short-term and long-term efficacy and safety of antiseizure medications in Lennox Gastaut syndrome: A network meta-analysis | 2022 | Seizure |
Efficacy and safety of antiseizure medication for Lennox-Gastaut syndrome: a systematic review and network meta-analysis | 2022 | Developmental Medicine and Child Neurology |
Anti-seizure medications for Lennox-Gastaut syndrome | 2021 | Cochrane Database of Systematic Reviews |
Highly Purified Cannabidiol for Epilepsy Treatment: A Systematic Review of Epileptic Conditions Beyond Dravet Syndrome and Lennox-Gastaut Syndrome | 2021 | CNS Drugs |
Cannabidiol in conjunction with clobazam: analysis of four randomized controlled trials | 2021 | Acta Neurologica Scandinavica |
Cannabidiol efficacy independent of clobazam: Meta-analysis of four randomized controlled trials | 2020 | Acta Neurologica Scandinavica |
Clinical Practice Guidelines
Document Title | Year | Source |
---|---|---|
An Italian consensus on the management of Lennox-Gastaut syndrome. | 2022 | Seizure: European Journal of Epilepsy |