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Opioid Use Disorder / Opioid Related Disorders / Stress Disorders, Post Traumatic · Journal article
Stress · September 4, 2026
Raises a question worth testing. It does not answer one.
This is a narrative review of mechanistic studies examining transcutaneous cervical vagus nerve stimulation (tcVNS) effects on autonomic physiology in PTSD and opioid use disorder. The authors report that tcVNS produces favorable changes in autonomic tone, cardiovascular function, inflammation, and brain activity in these populations, but the evidence is descriptive and preclinical, with no controlled trials, clinical outcomes, or comparative efficacy data presented.
Narrative review. Patients with posttraumatic stress disorder (PTSD) and opioid use disorder (OUD). Intervention: Transcutaneous cervical vagus nerve stimulation (tcVNS).
tcVNS affects autonomic function through parasympathetic enhancement and sympathetic suppression tcVNS demonstrates effects on autonomic tone, cardiovascular function, inflammatory responses, and central brain areas involved in emotion modulation Effects align with mitigation of autonomic dysregulation underlying PTSD and OUD symptomatology
Safety was not reported in the material analysed. Check the source before drawing any conclusion about harm.
This review does not provide sufficient evidence to guide clinical practice. Clinicians should await controlled trials with patient-centered outcomes before considering tcVNS as an established intervention for PTSD or OUD.
This is a narrative review synthesizing preliminary findings from small mechanistic studies without primary outcome data, effect sizes, or comparative efficacy to establish clinical utility.
As stated by the source record.
This review does not provide sufficient evidence to guide clinical practice. Clinicians should await controlled trials with patient-centered outcomes before considering tcVNS as an established intervention for PTSD or OUD.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
What is missing. This record has no reported figures. That is a gap in the analysis, not a judgement about the study.
The vagus nerve has branches that extend to the brain and a number of peripheral organs. Vagus nerve stimulation (VNS) affects autonomic function through enhancement of parasympathetic activity and suppression of sympathetic activity. Because of these effects VNS has a number of potential therapeutic applications. This review focuses on the effects of transcutaneous cervical VNS (tcVNS) on autonomic function in two stress-related psychiatric disorders that are characterized by increased sympathetic function, posttraumatic stress disorder (PTSD) and opioid use disorder (OUD). We have studied the effects of tcVNS on physiology in patients with PTSD and OUD with brain imaging, blood biomarkers, and wearable sensing devices. These studies demonstrated that tcVNS has effects on autonomic tone, cardiovascular function, inflammatory responses, and central brain areas involved in the modulation of emotion, that are favorable in terms of promoting recovery for patients with PTSD and OUD, in particular through effects that mitigate autonomic system dysregulation that underlies the symptomatology of these disorders. The effects of tcVNS on autonomic function and other stress-related circuits and systems show promise for development of interventions for these stress-related disorders that are related to the underlying neurobiology.
Taken from the source record, never inferred. Follow any of these and new work involving them reaches your briefing.