Trial reportCNS drugs2024
The Dose-Response Relationship between Opioid Agonist Therapy and Alterations in Pain Pathways in Patients with Opioid Use Disorders: A Cross-Sectional Study.
Trial report in CNS drugs, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
8 citing papers in PubMed, 6 citations in OpenAlex.
- An opioid-withholding human laboratory paradigm during opioid agonist treatment for opioid use disorder and chronic pain: Phase- and dose-dependent effects of cannabidiol.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026Trial
- Effect ofNutrients · 2026Trial
- Impact of Chronic Opioid Use in Recurrent Dislocations following Revision Total Hip Arthroplasty: An Iatrogenic Charcot-Like Arthropathy Case Report.Hip & pelvis · 2026Article
- Exploring the effects of cannabidiol on pain sensitivity using quantitative sensory testing among individuals receiving methadone or buprenorphine for opioid use disorder: an open-label, proof-of-concept study.Addictive behaviors reports · 2026Article
- Quantitative sensory testing of pain in persons with opioid use disorder on opioid agonist treatment: a scoping review.Pain medicine (Malden, Mass.) · 2026Article
- Association Between Smoking and Opioid Requirement and Pain Intensity in the Early Postoperative Period: A Meta-Analysis.Pain and therapy · 2026Article
- A meta-analysis of the efficacy of four antidepressants combined with common opioid analgesics in the treatment of cancer-related neuropathic pain.Archives of medical science : AMS · 2026Review
- The Dynorphin/-Opioid Receptor System at the Interface of Hyperalgesia/Hyperkatifeia and Addiction.Current addiction reports · 2025Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionThe administration of opioids can be followed by enduring neuroplastic changes in the peripheral and central nervous systems. This remodeling can lead to opioid-induced hyperalgesia, causing an increased sensitivity to painful stimuli. The description of opioid-induced changes in the somatosensory system has seldom been described in the setting of opioid agonist therapy in the treatment of opioid use disorders, and the few existing reports provide no guidance with respect to the effect of varied doses or substances.
objectiveThe aim of the present study was to assess alterations of pain pathways among patients receiving opioid agonist therapy and to elucidate the dose-response relationship.
methodsThis study was planned as cross-sectional in an outpatient clinic in Graz, Austria. Patients receiving opioid agonist therapy for opioid use disorders (including methadone, levomethadone, buprenorphine, and extended-release morphine) were asked to fill out a questionnaire, including the central sensitization inventory. A battery of somatosensory system assessments was then performed.
resultsA total of 120 patients participated (85 men/35 women). The mean oral morphine milligram equivalent (MME) was 694 ± 249 mg/day. Our study found significant alterations in pain perception, conditioned pain modulation, and wind-up. We demonstrated a moderate dose-response relationship between high-dose opioids and markers of central sensitization.
conclusionThe present trial demonstrates the clear effects of opioid agonist therapy on the somatosensory system. Both central sensitization and descending pain modulation are negatively affected by high doses of opioids and our data elucidate a moderate dose-response relationship for these phenomena.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.