At a recent on Capitol Hill, a former Eli Lilly sales rep, Shahram Ahari, gave lawmakers an insider's glimpse into the world of pharmaceutical sales. He said pharmaceutical companies go to extremes to sell their drugs -- from hiring attractive, young salespeople to familiarizing themselves with doctor's prescribing patterns.
"The fact of the matter is, we don't just give a doctor a pen," Ahari said. "We give them bucket loads of pens, pads, we take them out to fancy dinners, we give them samples, we give them medical equipment. Everything we do generates this sense to return the favor. And what better way to return the favor to your drug rep than to prescribe their medications?"
ABC News' Marcus Baram contributed to this report.