management of addiction issues in complex pain · pdf file• nestler, e. j., alreja, m.,...
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Management of Addiction Issues in Complex Pain
ACP Maine Chapter 2016 Annual Meeting
Sunday October 2nd, 2016
Jonathan C Fellers, MD Assistant Professor, Department of Psychiatry
Tufts University School of Medicine Director, Integrated Medication-Assisted Therapy Maine Medical Center, Maine Medical Partners
Medical Director, Maine Tobacco Help Line MaineHealth Center for Tobacco Independence
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Disclosures
• Relevant financial relationship(s) and nonfinancial relationship(s): – Dr. Fellers, co-editor and author of Treating
Comorbid Opioid Use Disorder in Chronic Pain, is employed by MaineHealth and Maine Medical Center
• Disclosure: – Financial: Author for Springer Publishing, receive
royalty payments – Nonfinancial: I have no relevant nonfinancial
relationship(s) to disclose
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Objectives
• Provide background of current theories of pain and addiction
• Describe differences in pain perception by patients with addiction
• Understand how to manage addiction patients with complex pain
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Background
• How many people with chronic pain may have addiction?
32% • How many people with opioid use disorder
report chronic pain? 29-60%
CSAT. (2011). Managing Chronic Pain in Adults With or in Recovery From Substance Use Disorders. Treatment Improvement Protocol (TIPS) 54. HHS Publication No. (SMA) 12-4671. Rockville, MD: SAMHSA.
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Pain Theories
• What is the purpose of pain? – Identifies injury and
disease – Motivates to protect
from further damage – Provides lesson about
the environment
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Pain Theories
• Specificity Theory – Pain is an independent sense, with its own unique
receptors, pathways, and “brain center”
• Pattern Theory – Perception of pain depends upon the temporal
and spatial pattern of stimulation
Moayedi, M., & Davis, K. D. (2013). Theories of pain: from specificity to gate control. J Neurophysiol; 109 (1), 5-12.
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Pain Theories
• Gate Control Theory – ”Gate" in the spinal cord controls the flow of pain
signals from the periphery to the central nervous system
– i.e. TENS unit
Melzack, R., & Wall, P. D. (1965). Pain mechanisms: a new theory. Science , 50 (3699), 971-9.
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Pain Theories
• Biopsychosocial Model – Pain is more than a biological phenomenon – Involves psychological and social factors – Informs multimodal approach to complex pain
Gatchel, R. J., Peng, Y. B., Peters, M. L., Fuchs, P. N., & Turk, D. C. (2007). The biopsychosocial approach to chronic pain: scientific advances and future directions. Psychol Bull; 133(4), 581-624.
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Addiction Theories
• Positive reinforcement – Mesocorticolimbic dopamine system involved in reward – Drugs of abuse enhance dopamine release within the
nucleus accumbens, including opioids
• Olds, J., & Milner, P. (1954). Positive reinforcement produced by electrical stimulation of septal area and other regions of rat brain. J Comp Physiol Psychol; 47(6), 419-27.
• Nestler, E. J. (2005). Is there a common molecular pathway for addiction? Nat Neurosci; 8(11), 1445-9.
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Addiction Theories
• Negative reinforcement – Locus coeruleus noradrenergic system important for
arousal and psychological stress – Opioid withdrawal leads to hyperactivity of system
• Nestler, E. J., Alreja, M., & Aghajanian, G. K. (1999). Molecular control of locus coeruleus neurotransmission. Biol Psychiatry; 46(9), 1131-9.
• Koob, G. F., Buck, C. L., Cohen, A., Edwards, S., Park, P. E., Schlosburg, J. E., et al. (2014). Addiction as a stress surfeit disorder. Neuropharmacology; 76 (Part B), 370-82.
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Addiction Theories
• Genetic factors account for between 40 and 60 percent of a person’s vulnerability to addiction – Altered response to the drug – Changes in drug metabolism
• Environmental factors – Each adverse childhood experience increased the
likelihood of early initiation into illicit drug use by 2- to 4-fold
– Peer influences – Drug availability
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Pain and Addiction
• Progression to opioid use disorder is not assured – Tolerance and withdrawal will develop
• Opioid use during acute pain is protective against addiction – Pain provides a natural counterbalance to opioid-
induced reward and tolerance
Miller, L. L., Altarifi, A. A., & Negus, S. S. (2015). Effects of repeated morphine on intracranial self-stimulation in male rats in the absence or presence of a noxious pain stimulus. Exp Clin Psychopharmacol;23 (5), 405-14.
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Pain and Addiction
• Does chronic exposure to opioids alter pain perception?
• Waccholtz et al looked at four groups (n=30) with chronic pain: – Methadone maintenance – Buprenorphine maintenance – History of opioid maintenance but prolonged
abstinence – Opioid naïve controls
Wachholtz A, Gonzalez G. (2014). Co-morbid pain and opioid addiction: long term effect of opioid maintenance on acute pain. Drug Alcohol Depend; 145: 143-9.
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Pain and Addiction
• What did they find? • Differences in the groups:
– Sensitivity to pain and ability to tolerate pain significantly lower among those with an opioid use disorder history compared to opioid naïve
– Prolonged abstinence did not alter it – Prolonged abstinence does improve sense of
control over opioid cravings
Wachholtz A, Gonzalez G. (2014). Co-morbid pain and opioid addiction: long term effect of opioid maintenance on acute pain. Drug Alcohol Depend; 145: 143-9.
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Pain and Addiction
Wachholtz A, Gonzalez G. (2014). Co-morbid pain and opioid addiction: long term effect of opioid maintenance on acute pain. Drug Alcohol Depend; 145: 143-9.
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Treatment
• What makes treating pain in patients with addiction so challenging?
• Three main challenges: – Rewarding aspect of opioids – Opioid tolerance – Opioid-induced hyperalgesia (OIH)
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Opioid Tolerance
• Without use or tolerance, we are at “normal”
• Normal
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Opioid Tolerance
• Acute use leads to drug effects
DRUG
• Euphoria • Decreased pain perception • Sedation • Respiratory depression • Constipation • Miosis
• Normal
DRUG Tolerance Tolerance
• Dysphoria • Increased pain perception • Restlessness • Tachypnea • Diarrhea • Mydriasis
• Repeated use lead to tolerance
• No use with tolerance leads to withdrawal
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Opioid Withdrawal Symptoms
Early to Moderate Moderate to Advanced
Anxiety, dysphoria, irritability Broken sleep
Fatigue, headache, restlessness, craving Muscle and bone pain
Yawning, lacrimation, rhinorrhea, Myoclonus
Perspiration, piloerection Vasomotor symptoms
Tachypnea Hypertension, tachycardia, hyperthermia
Anorexia Abdominal cramps, nausea, vomiting
Mild mydriasis Severe mydriasis
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Opioid Withdrawal Time Course
Drug Effect wear off Start Peak End
Fentanyl 1 hour 3-5 hours 8-12 hours 4-5 days
Meperidine 2-3 hours 4-6 hours 8-12 hours 4-5 days
Oxycodone 3-6 hours 8-12 hours 36-72 hours 7-10 days
Hydromorphone 4-5 hours 4-5 hours 36-72 hours 7-10 days
Heroin 4 hours 8-12 hours 36-72 hours 7-10 days
Morphine 4-6 hours 8-12 hours 36-72 hours 7-10 days
Codeine 4 hours 8-12 hours 36-72 hours 7-10 days
Hydrocodone 4-8 hours 8-12 hours 36-72 hours 7-10 days
Methadone 8-12 hours 36-72 hours 8-12 days 14-21 days
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Assessing Opioid Withdrawal
• Clinical Opiate Withdrawal Scale (COWS) • Standardized instrument based on objective
and subjective symptoms
5-12 = Mild 13-24 = Moderate 25-36 = Moderately Severe >36 = Severe
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Opioid-Induced Hyperalgesia
• Paradoxical increase in pain sensitivity due to opioid therapy
• Mechanism though to be glutamate (NMDA) dysfunction
• Increase in opioid dose will not improve pain
Lee M, Silverman SM, Hansen H, Patel VB, Manchikanti L. (2011). A comprehensive review of opioid-induced hyperalgesia. Pain Physician; 14(2): 145-61.
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Treatment
• Differs based on type of pain – Chronic – Acute
• Also depends on patient – In recovery – On methadone maintenance – On buprenorphine maintenance – Actively using
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Treatment
• General principles: – Complete a thorough assessment – Prioritize non-opioid analgesics
• Acetaminophen • NSAIDs • Antidepressants, anticonvulsants • Regional anesthesia
– Use nonpharmacological treatment • Therapeutic exercise • Physical therapy • Complementary medicine
– Treat comorbidities
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Treatment Analgesic Addictive Comments
Acetaminophen No Potentiates analgesia without potentiating respiratory and sedative side effects.
NSAIDs No Are used to relieve numerous types of pain, especially bone, dental, and inflammatory, and enhance opioid analgesia
SNRIs No Are used to relieve several nonstructural types of pain (e.g., migraine, fibromyalgia, low back pain) and probably others
TCAs No Have demonstrated efficacy in migraine prophylaxis, fibromyalgia, many neuropathic pains, vulvodynia, and functional bowel disorders
Anticonvulsants No* Some have demonstrated efficacy in relieving fibromyalgia, migraine prophylaxis, neuropathic pains
CSAT. (2011). Managing Chronic Pain in Adults With or in Recovery From Substance Use Disorders. Treatment Improvement Protocol (TIPS) 54. HHS Publication No. (SMA) 12-4671. Rockville, MD: SAMHSA.
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Treatment
• When opioids are needed consider: – Avoid opioid patient had trouble with – Avoid IV boluses – Patient-controlled analgesia – Using longer acting opioids
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Methadone
• Full agonist at μ opioid receptors, 24 hour half-life • Pain control lasts about 6-8 hours • Potent opioid with excellent oral bioavailability • Has some NMDA antagonism therefore offers some
protection against OIH • Side-effects include weight gain, QTc prolongation,
sex hormone suppression, sedation, constipation
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Methadone
• Continue maintenance dose • Consider splitting for 3-4 administrations • Additional opioids may be required fo acute
pain • Will require larger and more frequent
administration
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Buprenorphine
• Partial agonist at μ opioid receptors (about 60%), 36 hour half-life
• MUST BE IN WITHDRAWAL to start it • Poor bioavailability, requires sublingual
administration • Combination product includes naloxone, potent μ
opioid receptor antagonist that is not absorbed sublingually
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Buprenorphine
• Does have analgesic effects lasting 6-8 hours • Because it is a partial agonist, its dose–response
curve plateaus limiting efficacy in severe pain • May need to be discontinued so that full agonist
opioids for pain can be used • Substitute about methadone 30mg for
buprenorphine 12-16mg
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Switch to Buprenorphine
• Patients (n=35) on high-dose opioids (MME=550) with unsatisfactory pain control
• After two months: – Reduction in pain (7.2 3.5, p<0.001) – Quality of life improvement (6.1 7.1, p=0.005)
Daitch D, Daitch J, Novinson D, Frey M, Mitnick C, Pergolizzi J Jr. (2014). Conversion from high-dose full-opioid agonists to sublingual buprenorphine reduces pain scores and improves quality of life for chronic pain patients. Pain Med; 15(12): 2087-94.
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Active Substance Use
• Refer for addiction treatment • May begin methadone in hospital to manage
tolerance • Use of adjuvant ketamine peri-operatively
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