Healthcare Costs Prevented Nearly 40 Million Americans From Filling Their Prescriptions in 2008 Nearly 40 million U.S. adults decided not to fill a prescription medication from a doctor in the past year because of the cost, according to pharmaceutical and healthcare market research company Manhattan Research's Cybercitizen Health(TM) v8.0 consumer study and strategic advisory service. The study found that women and patients with neurological and mental health conditions were the most likely to give up their meds