ArticleBrain sciences2026
Subchronic Cannabidiol (CBD) Treatment During the Silent Period Fails to Prevent Increased Seizure Susceptibility Following Lithium-Pilocarpine-Induced Status Epilepticus.
Article in Brain sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionIn recent years, cannabidiol (CBD) has been used as an adjunct therapy to anti-seizure medications for the control of seizures in patients with drug-resistant epilepsy. In addition to its anticonvulsant effect, CBD also has well-defined anti-inflammatory properties. Since neuroinflammation can trigger various pro-epileptogenic mechanisms, CBD could play an inhibitory role in this process. Epileptogenesis is the process by which epilepsy becomes a chronic disease following a brain injury, and one of its main characteristics is an increased susceptibility to seizures due to a reduced seizure threshold. However, the role of CBD in modulating this susceptibility remains poorly understood. METHODOLOGY: We developed an experimental protocol to discretely measure the seizure threshold (DMST) 7 or 14 days after lithium-pilocarpine-induced status epilepticus (SE) through the administration of small intraperitoneal (i.p.) doses of pentylenetetrazol (15 mg/kg/every 10 min).
resultsUsing the DMST, we observed a significant decrease in the seizure threshold after SE associated with a hypersensitivity state characterized by irritability and marked weight loss. A separate cohort of rats was treated with CBD (20 mg/kg) for 14 days following SE.
conclusionsTreatment with CBD did not improve the seizure threshold; moreover, it worsened the hypersensitivity state and delayed recovery following SE. Our results suggest that orally administered CBD, at a human-equivalent therapeutic and safe dose, does not improve susceptibility to seizure development after SE.
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