The Use of Methadone for Pain by Medicaid Patients

iStockphoto

Overview

Methadone for the treatment of pain accounts for just 1 percent of all short- and long-acting opioid prescriptions in the United States. Yet approximately 23 percent of all opioid-related overdose deaths in the U.S. related to prescription drugs in 2014 (the most recent year for which this calculation has been published) were associated with this long-acting drug. The high mortality rate may be a result of the drug’s pharmacologic properties. Pain relief from methadone lasts four to eight hours, but its effects on other organs, such as the lungs and heart, can continue for hours longer. As a result, patients may put themselves at risk for respiratory depression and cardiac arrhythmia by taking additional doses of methadone to achieve pain relief before the original dose has been fully metabolized.

Nationally, a strong correlation exists between the rate of methadone prescribing for pain and the rate of methadone overdose deaths. Public health officials have been alerting clinicians to the harms associated with prescribing methadone to treat pain since 2006, when the Food and Drug Administration (FDA) released a public health advisory about risks associated with the use of the drug for pain. FDA, Centers for Disease Control and Prevention (CDC), associations representing clinicians, and health research and policy organizations have called for reducing the use of methadone to treat pain and support using alternative long-acting and extended-release opioids. Since the start of these efforts, dispensing of methadone for the treatment of pain has declined, on average, 3.2 percent per year. Further, methadone-related deaths declined by 39 percent between 2007 and 2014, with an additional 9 percent decrease between 2014 and 2015.

However, earlier research has shown high rates of methadone use to treat pain among Medicaid beneficiaries and found that the drug is disproportionately responsible for overdose deaths among individuals in this population. This may be due, in part, to factors at both the patient and population level that can affect the prescribing rates of a specific opioid. For example, patients who are first given alternative therapies, and fail to respond to them, may be more likely to be prescribed methadone for pain. Population factors that influence prescribing rates can include a higher percentage of patients with co-occurring conditions or pain that is hard to manage. Given that clinical guidelines and FDA-approved product labeling recommend against using methadone as a first-line pain therapy, one would expect that the rate of methadone prescribing would be no higher than that of alternative first-line therapies such as fentanyl and extended-release or long-acting formulations of morphine and oxycodone. However, this research found that in some states the use of methadone as a component of longacting and extended-release opioids is higher than that of alternative pain therapies.

In response, CDC and the Centers for Medicare & Medicaid Services (CMS) urged states to, where applicable, remove methadone for the treatment of pain from their respective Medicaid preferred drug lists (PDL). Preferred status is a designation by which states encourage the use of a drug for a specific disease or condition. Prior to these removal efforts, many Medicaid programs had designated methadone as a first-line therapy for the treatment of pain, likely due to the drug’s effectiveness and availability as a low-cost generic product. Recently, however, many Medicaid fee for service (FFS) programs have taken actions, such as removing methadone from the PDL, to address safety concerns. (The strategies Medicaid programs use to reduce the risk of harm associated with the use of methadone and other opioids are described in “Understanding Prescribing Rates,” Page 3.)

This report seeks to examine whether prescribing rates for methadone for the treatment of pain have changed between 2013 and 2016 across public and private payers and between Medicaid FFS programs with different PDL designations. The report examines data from IQVIA PayerTrak, which aggregates dispensing information from retail pharmacies, to probe the following questions:

How does the use of methadone for the treatment of pain compare across payers—including commercial, Medicare, and Medicaid—and how has this use changed between 2013 and 2016?

• Does the use of methadone for the treatment of pain differ as a proportion of long-acting or extended-release opioids between Medicaid FFS and managed care programs?
• To what extent is there variation among state Medicaid FFS programs in the use of methadone for pain?
• What was the status of methadone for pain on Medicaid FFS PDLs as of December 2016, and are there differences in prescribing based on changes in status between 2013 and 2016?

Key findings show that between 2013 and 2016:

• Nationally, across all payers, there was a 26 percent reduction in the total number of methadone pain prescriptions.
• Such prescriptions accounted for an average of 35 percent of long-acting and extended-release opioid prescriptions in Medicaid—including both managed care and FFS programs—14 and 12 percentage points higher than the average for commercial plans and Medicare, respectively.
• The use of methadone for pain as a percent of long-acting and extended-release opioids has decreased more rapidly in Medicaid FFS than in Medicaid managed care. Methadone as a percent of long-acting and extended-release opioids was, on average, 13 percentage points higher in Medicaid managed care than in FFS. In 2016 alone, methadone accounted for 21 percent of extended-release and long-acting opioids in Medicaid FFS, compared with 36 percent among managed care.
• The use of methadone for the treatment of pain—as a percent of long-acting and extended-release opioids—declined by 11 percentage points in Medicaid FFS programs. Medicaid managed care, Medicare, and commercial payers saw 7, 2, and 1.5 percentage point reductions in prescribing, respectively.
• Medicaid FFS programs that changed the PDL status of methadone to non-preferred for the treatment of pain had an 18.7 percentage point decrease in the prescribing of methadone for pain as a component of all long-acting and extended-release opioids during the study period, compared with a roughly 7 percentage point decrease in the group of states that listed methadone as preferred, had no PDL, or did not address the drug’s status on the PDL.