Patients get better with more expensive drugs

When patients with Parkinson’s disease received an injection described as an effective drug costing $1 500 (R17 500) per dose, their motor function improved significantly more than when they got one supposedly costing $100 (R1 200).

Underlining the power of expectations, the motor improvements, measured by a standard Parkinson’s assessment, occurred even though both injections contained only saline and no active ingredients.


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