An active placebo is a placebo that mimics the common side effects of the drug under study.[1]
According to a 1965 paper,[2] the term "fake placebo" (German: Kaschiertes Placebo) was suggested in a 1959 paper published in German.[3]
Morphine and gabapentin are painkillers with the common side effects of sleepiness and dizziness. In a 2005 study assessing the effects of these painkillers on neuropathic pain, Lorazepam was chosen as an active placebo because it is not a painkiller but it does cause sleepiness and can cause dizziness.[4]
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