Chronic Pain Management: The Role of Long-Duration Ketamine Infusions

Chronic pain affects quality of life in ways that extend well beyond the physical — it disrupts sleep, strains relationships, and significantly increases the risk of depression and anxiety (Mental Health America, n.d.). For patients whose pain has not responded to standard treatments, including medications, physical therapy, and interventional procedures, the clinical options narrow quickly. At Thrive Center for Health in Grand Rapids, IV ketamine therapy offers a different mechanism of action for chronic pain patients — one that addresses the neurobiology of pain sensitization rather than simply managing symptoms.

Why Chronic Pain Requires a Different Approach

Chronic pain — defined broadly as pain persisting beyond the normal healing period, typically three months or longer — is not simply acute pain that has not resolved. It involves a process called central sensitization, in which the central nervous system becomes hypersensitive to pain signals, amplifying and perpetuating them even after the original injury or inflammation has resolved. Standard analgesics often address peripheral pain mechanisms but do not directly target this central sensitization.

Ketamine works by blocking NMDA receptors — a class of glutamate receptors that play a central role in the development and maintenance of central sensitization (Gorlin et al., 2016). By interrupting the NMDA receptor activity that drives the hypersensitive pain state, ketamine may produce meaningful reductions in pain intensity for patients with conditions that have not responded to conventional treatment. This is the neurobiological rationale behind using ketamine specifically for chronic pain, and it is distinct from the mechanism by which opioids or anti-inflammatory medications work.

The relationship between chronic pain and mental health compounds the clinical picture. Research documents a strong bidirectional relationship between depression and chronic pain — each condition worsens the other, and effective treatment of one often produces measurable improvement in both (Bair et al., 2017). For patients managing both chronic pain and a mood disorder, IV ketamine’s dual action on the glutamate system may address both dimensions of their condition within the same treatment protocol. We discuss this intersection openly during the clearance process so that every patient understands the full scope of what treatment may and may not address.

The Conditions We Treat

At our clinic, the chronic pain conditions we treat through IV ketamine include complex regional pain syndrome (CRPS), fibromyalgia, neuropathic pain, migraine headaches, and restless leg syndrome (RLS). Each of these involves mechanisms — nerve dysfunction, central sensitization, aberrant pain signaling — that standard pain management approaches frequently fail to address adequately.

CRPS, in particular, is one of the most painful and least understood chronic pain conditions. The Mayo Clinic describes it as a form of chronic pain that typically affects an arm or leg and usually develops after an injury, surgery, stroke, or heart attack, with pain that is disproportionate in severity to the triggering event (Mayo Clinic, n.d.). For CRPS patients who have exhausted conventional options, ketamine’s NMDA-blocking mechanism offers a pathway that addresses the underlying central sensitization rather than working around it.

Fibromyalgia and neuropathic pain conditions — including peripheral neuropathy, described by the National Institute of Neurological Disorders and Stroke as damage to the peripheral nervous system that produces pain, weakness, and other symptoms throughout the body (NINDS, n.d.) — similarly involve mechanisms well-suited to ketamine’s pharmacological target. Results vary significantly by individual and by condition, and we make no guarantees about outcomes. What we can offer is a thorough evaluation and a treatment protocol built specifically for chronic pain, not adapted from a mood disorder protocol.

How the Chronic Pain Protocol Differs

The chronic pain infusion protocol at Thrive Center for Health differs from our mood disorder protocol in two important ways: dose and number of sessions. Chronic pain typically requires higher ketamine doses and longer infusion durations to achieve NMDA receptor saturation sufficient to interrupt central sensitization — a pharmacological requirement that distinguishes pain treatment from depression treatment even when the same drug and delivery method are used.

Our chronic pain protocol involves 4–6 initial infusions rather than the 6–10 used for mood disorders. The per-infusion dose is higher, and the pricing reflects this: without insurance, the cost is $750 per infusion for chronic pain patients, compared to $500 per infusion for the mental health protocol. The psych clearance ($250) and medical clearance ($150) steps apply to all ketamine patients regardless of indication. For patients with accepted insurance — including Cigna, BCBS, Priority Health, Aetna, McLaren, Molina, TriCare, Michigan Medicaid, and Michigan Medicare — the per-infusion cash portion for chronic pain patients is $550, with office visit components billed to insurance.

The medical clearance step is particularly important for chronic pain patients, many of whom present with complex medical histories involving prior treatments, medication regimens, and comorbid conditions. Our team — including Family Nurse Practitioner Kelsey, who handles all medical clearances, and Medical Director Dr. Drumm, whose clinical background includes research on ketamine’s utility in psychiatric and pain disorders — reviews each patient’s full history before treatment begins.

The Pain-Depression Connection in Clinical Practice

We treat a significant number of patients whose chronic pain exists alongside depression, anxiety, or PTSD — and this co-occurrence is not coincidental. Persistent pain significantly impairs overall well-being and quality of life in ways that directly increase psychological distress (Bair et al., 2017). The neurobiological overlap between chronic pain and mood disorders means that patients who come to us for pain treatment may also benefit from ketamine’s antidepressant effects, and vice versa.

This is not a claim about guaranteed dual outcomes. Results vary by individual, and we approach each patient’s treatment plan based on their specific presentation rather than a generalized expectation. What it does mean is that our team is equipped to hold both dimensions of a patient’s condition in view simultaneously — which is not always true of practices that specialize exclusively in pain or exclusively in psychiatry.

Addressing Two Common Barriers

For patients considering ketamine for chronic pain, cost is frequently the first question. The chronic pain protocol carries a higher per-infusion price than the mood disorder protocol, reflecting the higher doses involved. Veterans receive a 10% discount on all visits. Monthly support group meetings are available at no charge for all patients. If you are uncertain about insurance coverage or out-of-pocket costs, contact us before scheduling — our team will verify your coverage and walk through the numbers with you directly.

Fear and skepticism about ketamine as a pain treatment is the other barrier we encounter regularly. Many chronic pain patients have been told by previous providers that their options are exhausted, or have encountered dismissal of their symptoms as psychological rather than physiological. We take both the physical and psychological dimensions of chronic pain seriously as clinical phenomena. The evaluation process is not a test of whether your pain is real — it is an assessment of whether ketamine therapy is the appropriate next step given your history and current condition. Bring your full history to the consultation, including treatments that have not worked. That information is exactly what we need.

Frequently Asked Questions

How is ketamine for chronic pain different from ketamine for depression? The mechanism overlaps — both involve NMDA receptor blockade in the glutamate system — but the protocol differs. Chronic pain typically requires higher doses and a different infusion duration than mood disorder treatment. At our clinic, the chronic pain protocol involves 4–6 initial infusions at a higher per-session dose than the 6–10 infusions used for mood disorders. Discuss your specific condition with your provider to understand which protocol applies.

Which chronic pain conditions does Thrive treat? We treat CRPS, fibromyalgia, neuropathic pain, migraine headaches, and restless leg syndrome through our IV ketamine chronic pain protocol. Candidacy for each is assessed during the psych and medical clearance process. If your condition is not on that list, contact us to discuss whether your situation may still qualify for evaluation.

Will ketamine eliminate my pain completely? Results vary by individual, and we do not guarantee specific outcomes. Some patients experience significant and sustained pain reduction following the initial series; others experience partial improvement; some do not respond. The goal of the initial series is to assess your response and build a maintenance plan around what works. Explore your options during the consultation and ask your provider what a realistic range of outcomes looks like for your specific condition.

How long does pain relief from ketamine last? Duration of effect varies significantly by individual and condition. Some patients maintain meaningful relief for weeks to months following the initial series and manage with periodic maintenance infusions. Others require more frequent maintenance. This is something your provider will monitor and adjust over time based on your response. No fixed timeline can be promised.

Can I continue my current pain medications during ketamine treatment? This depends on your specific medication regimen and is a clinical decision made during the medical clearance process. Some medications interact with ketamine in ways that require adjustment before treatment begins. Bring a complete list of your current medications — including dosages — to your clearance appointment.

Key Takeaways

• Chronic pain involves central sensitization — a process by which the central nervous system becomes hypersensitized to pain signals — and IV ketamine addresses this through NMDA receptor blockade, a mechanism distinct from opioids and anti-inflammatory drugs.
• Thrive Center for Health treats CRPS, fibromyalgia, neuropathic pain, migraine headaches, and restless leg syndrome through a dedicated chronic pain infusion protocol involving 4–6 initial infusions at higher doses than the mood disorder protocol.
• The bidirectional relationship between chronic pain and depression means that ketamine’s glutamate system action may address both dimensions of a patient’s condition simultaneously — though results vary by individual and no specific outcome can be guaranteed.
• The chronic pain protocol carries a higher per-infusion cost than the mood disorder protocol, reflecting the higher doses required; insurance coverage through accepted plans may reduce out-of-pocket costs significantly.
• A thorough psych and medical clearance is completed before any infusion begins, allowing our team to review each patient’s full history and build a treatment plan appropriate to their specific condition and prior treatment history.

Chronic pain patients who arrive at Thrive Center for Health have almost always tried other options first. We understand that, and we approach every chronic pain evaluation with that history in view. If you are in Grand Rapids or the West Michigan area and are managing a chronic pain condition that has not responded adequately to prior treatment, call us at 616-730-8069 or request a consultation at thriveketamine.com. Results vary by individual — we will give you an honest assessment of what IV ketamine therapy may offer for your specific situation.

References

1. Gorlin, A. W., Rosenfeld, D. M., & Ramakrishna, H. (2016). Intravenous sub-anesthetic ketamine for perioperative analgesia. Journal of Anaesthesiology Clinical Pharmacology. https://www.ncbi.nlm.nih.gov/books/NBK539824/
2. Bair, M. J., Wu, J., Damush, T. M., Sutherland, J. M., & Kroenke, K. (2017). Association of depression and anxiety alone and in combination with chronic musculoskeletal pain in primary care patients. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC5494581/
3. Mayo Clinic. (n.d.). Complex regional pain syndrome: Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/crps-complex-regional-pain-syndrome/symptoms-causes/syc-20371151
4. Mental Health America. (n.d.). Chronic pain and mental health. https://www.mhanational.org/chronic-pain-and-mental-health
5. National Institute of Neurological Disorders and Stroke. (n.d.). Peripheral neuropathy. https://www.ninds.nih.gov/health-information/disorders/peripheral-neuropathy

Medical Disclaimer: The information in this blog is provided for educational purposes only and does not constitute medical advice. IV ketamine therapy for chronic pain should only be pursued under the supervision of a licensed medical provider familiar with your full medical and psychiatric history. Individual results vary — not every patient will respond to ketamine therapy, and no specific outcome can be guaranteed. Discuss all treatment options with a qualified healthcare provider before making decisions about your care. If you are experiencing a mental health crisis or thoughts of self-harm, please call or text 988 to reach the Suicide and Crisis Lifeline or go to your nearest emergency room.