active placebo active placebo /ˈækˌtɪv ˈplæsɪboʊ/

noun

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