placebos

In addition, the subjects who took guanfacine had significantly more somnolence, lightheadedness, and dry mouth than those who took placebo.

另外，服用氯苯乙胍比服用安慰剂有更明显嗜睡、头昏、口干等症状。

In the testees with medium and high sea-sickness susceptibility, however, placebo showed no effect and dry ginger root powder was superior to dimenhydrinate inhibiting sea-sickness.

对中及高敏感受试，安慰剂无效，干姜粉抗晕船效果优于晕海宁。