TBPO is an extremely toxic bicyclic phosphate convulsant and GABA receptor antagonist. TETS is a neurotoxin and convulsant, causing lethal convulsions. Norpethidine is toxic and has convulsant and hallucinogenic effects. It acts as a potent antagonist of the glycine receptor, and has powerful convulsant effects. It is competitive inhibitor of glutamate decarboxylase, and therefore acts as a convulsant. Phenylsilatrane is a convulsant chemical which has been used as a rodenticide. It is the sulfoximine derivative of methionine with convulsant effects. It's a rapid acting convulsant, causing convulsions within 1 minute in mice and rats. At high dosages, it can act as a convulsant agent in mice and rats. TBPS ("tert"-butylbicyclophosphorothionate) is a bicyclic phosphate convulsant. It may also have convulsant effects. It has powerful convulsant activity and should not be used in seizure-prone individuals.