約有半數醫師會開安慰劑

Prescribing "placebo treatments": results of national survey of US internists and rheumatologists
BMJ 2008;337:a1938

在這個美國的調查發現

約有半數醫師會開安慰劑

The placebos prescribed most often were over-the-counter analgesics and vitamins (each about 40%); antibiotics and sedatives were each used about 15% of the time.