We’re taking another look at Pharmacy Benefit Managers or PBMs. Why were PBMs started and how did they morph to become one of the most powerful entities in health care? Why have they caught the attention of the Federal Trade Commission? How are they a threat to consumers?

To find out, we spoke to Dr. Ed Weisbart, the national board secretary of Physicians for a National Health Program and former chief medical officer of one of the biggest PBMs in the country. This is the first episode in a two-part series.