vomiting was significantly more frequent in the placebo-treated group [ 0.2 +/- 1.5 sd episodes per patient , n=21 ] than in the groups treated with prochlorperazine [ 1.2 +/- 0.5 episodes per patient , n=21 ] or hydroxyzine [ 0.3 +/- 0.8 episodes per patient , n=19 ] .
C0042963
vomiting
C0020404
hydroxyzine