The study noted a price change of -31.7% for quadropoly and 47.4% for monopoly.
Among the respondents who said their medication costs were a burden, 49% had not talked to their doctors about the issue.
Former pharma reps are educating doctors about costs of medications and encouraging the use of generic drugs.
At the annual meeting, the physicians' group adopted new policies on drug pricing to protect patients.
The cost of brand-name drugs for chronic conditions rose nearly 130 times faster than the inflation rate.
Strategy would encourage manufacturers and insurers to share accountability for clinical outcomes