Canna~Fangled Abstracts Δ⁹-Tetrahydrocannabivarin suppresses in vitro epileptiform and in vivo seizure activity in adult rats. Δ⁹-Tetrahydrocannabivarin suppresses in vitro epileptiform and in vivo seizure activity in adult rats. Hill AJ, Weston…Freedom WaresAugust 5, 2010