Prescription / OTC drugs in 36 months killed 4,140 people

Since March of 2008 when the CDC  told the senate about the prescription drug epidemic, prescription / OTC drug overdoses have killed 4,140 people in 36 months, 115 deaths a month.  Additional drug screening by all doctors could reduce these numbers dramatically, but this would take for each patient an extra 20 minutes from doctors and a minimal cost to patients.  

Twenty minutes and a minimal expense or a persons life. 

I thought the medical profession was committed to saving lives, not time or a minimal expense.