Percentage age distribution of lamotrigine-treated population who experienced Stevens-Johnson syndrome/toxic epidermal necrolysis (cases), patients receiving lamotrigine who experienced non-cutaneous adverse drug reactions (reference A) and experienced Stevens-Johnson syndrome/toxic epidermal necrolysis after other drugs (reference B). Percentage age distribution of lamotrigine-treated population who experienced Stevens-Johnson syndrome/toxic epidermal necrolysis (cases), patients receiving lamotrigine who experienced non-cutaneous adverse drug reactions (reference A) and experienced Stevens-Johnson syndrome/toxic epidermal necrolysis after other drugs (reference B). Many of the reports for ages <1 year old concern in utero exposure and congenital anomalies. Oluwaseun Egunsola et al. bmjpo 2017;1:e000039 © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.