active placebo

1. All three active treatments were more effective at opening airways than placebo.
   所有三个治疗组在扩张气道方面都比对照组更为有效。
2. In2004, they showed that the two most common active ingredients in cough syrup, dextromethorphan and diphenhydramine, had the same effectiveness in treating cough symptoms as a placebo ingredient.
   在2004年，他们指出：止咳糖浆中的两种最普通的有效成分（右美沙芬和苯海拉明），在治疗咳嗽症状中与安慰剂成分有相同的功效。
3. In the scenario of active control trials, we can only indirectly compare treatment with placebo. This article introduces some methods implementing this kind of comparison.
   在现行疗法对照试验中，对照是现行标准疗法，新疗法与安慰剂的比较只能间接进行，本文介绍了现行疗法对照试验中将新疗法与安慰剂进行间接比较的几种方法。
4. Results The efficacy of antibacterial drugs in the treatment of chronic and active ulcerative colitis was 9%~ 28% higher than that of placebo, the average was 18% ( P < 0.0001).
   【结果】抗菌药物辅助治疗的有效率比安慰剂高9%～28%，平均高18%，效率差异有显著性（P<00001）。

noun

1. a placebo used in experimental tests of a drug that has noticeable side effects
   1. an active placebo mimics the side effects of the experimental drug