In this paper an attempt is described to measure the cost differential betw
een treating episodes of overdose on older antidepressants (e.g. TCAs) and
those involving newer antidepressants (e.g. SSRIs). Data is presented showi
ng that it is possible to demonstrate a marked cost differential between ol
der and newer agents; although there are difficulties in precisely quantify
ing the difference. The limitations of the data are discussed and recommend
ations made for the methodology of a larger, more sensitive, study. (C) 199
9 John Wiley & Sons, Ltd.