Administration of suxamethonium to patients with critical illness produce l
ife-threatening hyper kalaemia. A questionnaire to assess the awareness of
this problem was sent to all Uk intensive care units. A clinical scenario s
uggestive of critical illness polyneuropathy was accompanied by a list of p
ossible drugs used to facilitate endotracheal intubation. Most respondents
(68.7%) chose suxamethonium while 20.4% avoided any muscle relaxant. This r
esult suggests a worrying lack of appreciation of the dangers of suxamethon
ium use in critical illness polyneuropathy.