According to Linda Johnson, The Associated Press, "it appears that more than half of all insured Americans are taking prescriptions regularly for chronic health problems...".
Her article also points out that among seniors over 20% take five or more medicines regularly and more children are taking medicines for "adult conditions".
At the same time, too many prescription drug users fail to take their drugs and end up in the emergency room because of a drug interaction issue or failure to take the drugs regularly as prescribed.