Worked for me! Just after abdominal surgery, the morphine I was receiving was giving me roomspins and making me vomit (imagine trying to hold your guts in, and balance a basin at the same time). The surgeon told me that he would switch me to Dilaudid. I didn't hear him say "on request", just assumed I was on it, and never asked for any. At checkout, he and the hospitalist wanted to know why I never asked for any. I told them that I thought I had been on it, and that I must have been on Placebo® instead.