Other fun placebo effects: red pills work better than blue pills. All pills work better if given to you by a doctor. Better still if the doctor is wearing a white coat. Yet better is the doctor uses a large peace of medical machinery as part of the intervention. And yet a bit better on top if the machine beeps.

Basically, for best results you want to receive your medicine as the Star Patient in a Very Important Looking Medical Drama right at the moment where Everything Starts Getting Better.