Visible Synthetic-Cannabinoid Convulsions Did Not Always Match EEG Seizures in Mice
Visible convulsive behavior and an electrographic seizure are not identical observations. A mouse experiment with several synthetic cannabinoid receptor agonists found convulsions without accompanying EEG seizures under its recording conditions.
The drugs were specific synthetic agonists
The study investigated AB-PINACA, 5F-AB-PINACA, 5F-ADB-PINACA and JWH-018. These are not interchangeable with THC or plant cannabis. Researchers assessed observed behavior, EEG measures and video, with pentylenetetrazole used in the broader experimental comparisons.
Antagonist and pretreatment findings differed
The abstract reports that rimonabant blocked convulsive effects of selected compounds, consistent with CB1 receptor involvement. Diazepam did not block those effects under the tested pretreatment conditions. Repeated administration produced partial tolerance to some convulsive effects without cross-tolerance to pentylenetetrazole convulsions.
An EEG-negative result has limits
The result concerns the drugs, doses, animals and measurements actually studied. It does not establish that every synthetic-cannabinoid event in a person lacks an electrographic seizure, nor that visible convulsions are harmless. It also cannot establish treatment failure or dictate emergency treatment in humans.
For toxicology testimony, distinguish a witnessed movement description from a neurological diagnosis and from an identified chemical exposure. The name of a drug class alone does not supply the missing clinical evidence. This research illustrates why behavior, electrophysiology and receptor-mechanism experiments should be reported separately rather than collapsed into a single claim about cannabis and seizures.
Related: interpreting cannabis tolerance claims.
Research cited
Wilson CD; Zheng F; Fantegrossi WE. Convulsant doses of abused synthetic cannabinoid receptor agonists AB-PINACA, 5F-AB-PINACA, 5F-ADB-PINACA and JWH-018 do not elicit electroencephalographic (EEG) seizures in male mice. Psychopharmacology (2022). doi:10.1007/s00213-022-06205-6. Findings discussed from the study abstract.
