Chronic Pain and Addiction

Chronic pain and opioid use disorder represent one of the most clinically complex co-occurring presentations in medicine. The opioid epidemic has created millions of individuals in whom the clinical picture combines legitimate chronic pain — often undertreated — with opioid physical dependence or frank opioid use disorder. Separating these components, and addressing both simultaneously, requires clinical sophistication that most healthcare settings are not yet equipped to provide.

The Chronic Pain-Opioid Use Cycle

Opioids, while effective for acute pain, have limited evidence for efficacy in most chronic non-cancer pain conditions over long periods — and carry significant risks. With chronic opioid use, opioid-induced hyperalgesia can develop: a paradoxical increase in pain sensitivity driven by neuroplastic changes induced by the opioids themselves. This means some patients taking opioids for chronic pain experience worsening pain, creating pressure to escalate dosing in a cycle that makes the situation worse.

Diagnosing OUD in Chronic Pain Patients

Applying standard OUD diagnostic criteria to patients with chronic pain on opioid therapy is complicated. Physical dependence (tolerance, withdrawal) is a pharmacological expectation in patients on chronic opioids and does not itself indicate OUD. DSM-5 criteria require evidence of impaired control, compulsive use despite harm, and social impairment — features that go beyond mere physical dependence. Pseudo-addiction — drug-seeking behavior driven by undertreated pain rather than addiction — must also be considered.

Integrated Treatment Approach

The most effective approach to co-occurring chronic pain and OUD addresses both simultaneously:

• Buprenorphine for OUD — Buprenorphine is a partial opioid agonist with partial analgesic properties. For patients with both OUD and chronic pain, buprenorphine-based MAT can simultaneously treat OUD and provide some pain management, though its analgesic ceiling and dosing interval (twice or three times daily for pain, once daily for MAT) create management challenges.
• Non-opioid pain management — SNRIs (duloxetine), anticonvulsants (gabapentin, pregabalin), NSAIDs, topical agents, and physical therapy are components of a multimodal pain management approach that reduces opioid requirements
• CBT for chronic pain — Addresses pain catastrophizing, fear-avoidance, and the psychological amplification of pain perception — with demonstrated benefits on pain interference and function even without significant pain intensity reduction
• Treating co-occurring mental health conditions — Depression and anxiety amplify pain perception; their treatment is part of comprehensive pain management

Related: Chronic Pain Overview · MAT — Buprenorphine · Opioid Addiction & Mental Health