Although pseudoseizures are a cause of drug toxicity (as escalating doses are used in an attempt to suppress seemingly intractable spells), in this brief report the exact converse is argued: namely, that a sub-group of pseudoseizures may arise as a reversible idiosyncratic toxic side-effect of GABAergic anticonvulsants. The term "organic pseudoseizures" is used to denote this group of medication related behavioural alterations. (C) 2003 Published by Elsevier Ltd on behalf of BEA Trading Ltd.