cluster in most children.23 A retro-spective study reported that a single dose of chloral hydrate (50 mg/kg/d) was effective in stopping a cluster in 19 of 22 patients (86%), whereas di- azepam was effective in only 2 of 16 patients (13%).24 Care must be taken in monitoring young children receiv-ing chloral hydrate, which may cause excessive sedation, vomiting, hyper-