Direct-to-consumer advertising (DTCA) is legal only in the United States and New Zealand and has been linked with drug overutilization, public health concerns, and higher costs. 1 Despite global proscriptions, DTCA is the most rapidly increasing form of pharmaceutical marketing, with approximately $4 billion in US expenditures, outpacing physician marketing and research and development.

Liang B. A, Mackey T. Direct-to-Consumer Advertising With Interactive Internet Media. JAMA. 2011 2 23; 305 (8): 824-825.