Researchers found hormone replacement therapy caused breast cancer and heart disease; yet this form of preventative treatment was recommended to healthy women for more than ten years, up until testing proved that HRT caused more harm than good.
H. Gilbert Welch, a medical researcher from Dartmouth, recommends putting more money into testing the medical practices and treatment we push onto patients, so that Americans can benefit from health care that is tested to be effective.
Currently, only .03% of health care costs go towards researching our health care practices and treatment; Welch recommends increasing it to 1%. We spend so much money on health care nowadays that it only seems sensible to make sure our money is going towards medicine that works.
His entire opinion can be read in The New York Times.