Anaesthesia, movement and emesis. 
One hundred and eighty-two women undergoing dilatation and curettage were allocated randomly to receive premedication comprising temazepam, papaveretum-hyoscine or placebo.  The temazepam recipients reported significantly fewer episodes of postoperative nausea.  Movement was blamed by 66% of patients who identified a cause for nausea.  These patients had higher scores on a motion sickness susceptibility questionnaire and were more likely to have been treated previously for nausea or vomiting.  It may be possible to identify susceptible patients before surgery.