You and Sir Winston are both damning examples of the confirmation bias of progtards. According to the most recent information it costs $2.5 BILLION and take 10 years to successfully develop a new drug. Nobody spends anywhere near 10% of that on marketing.
To get a feel for the real percentages spent on marketing vs R&D you have to look at the yearly spending for both.
Pfizer topped that list with $622.3 million in ad spending last year . Pfizer came in fourth on FierceBiotech's list of R&D budgets, with $7.9 billion. That means DTC ads were less than one-tenth the size of its R&D budget.
That puts their marketing costs at less than 10% of what they spend on R&D and well withing normal expectations for most industry.