Monroe County Department of Public Health, Rochester, NY (Dr. Mendoza); Department of Family Medicine, University of Rochester, NY (Drs. Mendoza and Russell) MichaelMendoza@monroecounty.gov
The authors reported no potential conflict of interest relevant to this article.
For all patients, frequent follow-up visits with their primary care clinician, as well as referrals to mental health, physical therapy, and pain or rehabilitation services, can promote a successful taper. It is advised that, before beginning a taper, a treatment plan should be written out with the patient so that expectations are shared by physician and patient for the goals of the taper, the speed of dosage decreases, and the frequency of follow-up after each dosage change. At each follow-up visit, education regarding self-management and individualized recommendations for psychosocial support, mental health services, and substance use disorder services should be updated.
Assessing risk when tapering chronic opioid therapy
The goals of tapering should be to (1) reduce adverse effects of treatment and (2) mitigate short- and long-term risks.
Three short-term risks
Unmasking OUD. Tapering prescribed opioids, or even just discussing tapering, can unmask OUD in some patients. Follow-up visits during the tapering schedule should include frequent screening for OUD. If OUD is diagnosed, we recommend beginning medication-assisted treatment or referring the patient to a substance use treatment center. There is strong evidence of the safety and efficacy of medication-assisted treatment, even with a coexisting chronic pain disorder.27
Withdrawal syndrome. Opioid withdrawal syndrome is characterized by signs and symptoms of sympathetic stimulation, resulting from decreased sympathetic blockade by opioids (TABLE).28 (See “Changes in the locus ceruleus lead to withdrawal.”29) Symptoms start 2 to 3 half-lives after the last dose of opioid. Oxycodone, for example, has a half-life of 3 to 4 hours; withdrawal symptoms should therefore be anticipated in 6 to 12 hours. Because mixing opioids is commonplace, it can be difficult to predict exactly when withdrawal symptoms will begin. Patients are often most helpful in predicting the onset and severity of withdrawal symptoms.
SIDEBAR Changes in the locus ceruleus lead to withdrawal
Normally, the locus ceruleus (LC), a pontine nucleus within the brainstem, produces noradrenaline (NA), which stimulates alertness, breathing, and blood pressure, among other physiologic functions. When opioids bind to the mu-opioid receptors in the LC and decrease the release of NA, the result is diminished alertness, lower blood pressure, and slower respiration.
With chronic exposure to opioids, the LC acts to increase levels of NA to counteract suppression. When a patient stops taking opioids, the increased NA levels become excessive and produce symptoms of opioid withdrawal. 29
Withdrawal can be measured using any of a number of validated tools, including
the Subjective Opiate Withdrawal Scale, or SOWS30 (FIGURE 1), which utilizes a patient self-report
the Clinical Opiate Withdrawal Scale, or COWS31 (FIGURE 2), which relies on assessment made by the physician.