In the US, full product ads are the most common form of televised DTCA [24], [25].
Although spending on DTPA still outweighs spending on DTCA [ 2, 6, 7], the amount spent on DTCA continues to rise.
In 1997, the FDA rolled back this requirement and it opened the way for a new era in DTCA [ 16].
Direct-to-consumer advertising (DTCA) (n = 1) [ 13].
However in 2001, the agency had only 30 reviewers to control 34,000 DTCA.
Indeed, calls for an outright ban on DTCA mimic the 25-year old WHO Ethical Criteria for Medicinal Drug Promotion that first recommended the general prohibition of DTCA even before its popularization and widespread use in the U.S. [ 19].
We used published US data on DTCA spending for 1995 [9] and 1996 [10] and IMS Health data for 2006 [11].
Of 8 brands with >$500,000 spending, which together accounted for 59% of branded DTCA in all media, 6 were subject to Canadian safety advisories, and 4 had US black box warnings.
This study examines spending on DTCA in Canada from 1995 to 2006, 12 years spanning this policy shift.
Though all sources reported an upward trend in eDTCA, Kantar Media reported a significantly higher amount (+$107,111,591) of Internet DTCA expenditure than Nielsen Co. (p = 0.0229) (See Fig. 2 and Table 3).
Manchanda et al. [ 38] used monthly DTCA expenditure as proxy for aggregate marketing expenditure, and found no association with doctors' adoption behaviour not entirely surprising, since DTCA was zero in the first ten months after launch.
