The Audit Commission in the UK recommends that patient information leaflets
(PILs) should be audited by health professionals using a formal readabilit
y test. However, no such study on antiepileptic drugs (AEDs) has been ident
ified in a Medline search. The aim of this study was to audit the readabili
ty of PILs prepared for marketed proprietary AEDs in the UK. Twelve PILs we
re compared with six antiepileptic drug articles from medical journals and
six headline articles from UK newspapers. The Gunning Fog index and the Fle
sch Reading Ease index were calculated for each PIL and article. The result
s of the Gunning Fog index and the Flesch Reading Ease score were compared
using the Kruskal-Wallis non-parametric test. PILs were shown to have a sta
tistically significant lower mean reading age than the medical articles and
newspapers (P < 0.001). The Gunning Fog index and Flesch Reading Ease scor
e showed that PILs had a mean reading age of 8.8 and mean readability score
of 69, respectively. In conclusion, the PILs prepared for proprietary anti
epileptic drugs in the UK are suitable for the reading age of the general a
dult population.