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Vagus Nerve Stimulation for Long/Post-COVID Recovery

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Study Aim

This study aims to assess whether stimulating your vagus nerve can help improve your energy levels, reduce fatigue, and alleviate symptoms of depression if you're recovering from long or post-COVID conditions.

What is being tested

transcutaneous vagus nerve stimulation

+ Monitoring

+ cardiowatch bracelet

DeviceBehavioral
Who is being recruted

COVID-19+17

+ Post-Acute COVID-19 Syndrome

+ Post-Infectious Disorders

From 18 to 65 Years
See all eligibility criteria
How is the trial designed

Treatment Study

Interventional
Study Start: July 2024
See protocol details

Summary

Principal SponsorUniversity Hospital Tuebingen
Study ContactNils B. Kroemer, Prof. Dr.More contacts
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: July 19, 2024

Actual date on which the first participant was enrolled.

This study explores ways to help patients with Long/Post-COVID recover better after physical activity. It focuses on a treatment called transcutaneous vagus nerve stimulation (tVNS), which involves stimulating a nerve in the body using a device. The study involves 120 patients, who are divided into groups to receive either high or low-intensity stimulation, or no stimulation at all. The goal is to see if tVNS can improve recovery and motivation in patients, potentially offering a new method to manage Long/Post-COVID symptoms. Participants in the study will undergo several assessments, including completing questionnaires and providing blood samples to measure various health markers. They will also wear a cardio bracelet to track physiological signs like heart rate and activity levels. Over a 12-week period, those in the treatment group will self-administer tVNS for four hours each day. The study will monitor changes in motivation and decision-making through daily tasks and smartphone assessments. This research is designed to observe how tVNS might influence recovery and mental states in patients dealing with Long/Post-COVID.

Official TitleTranscutaneous Vagus Nerve Stimulation (tVNS) for Improved Recovery After Exertion in Patients With Long/Post-COVID.
NCT06510985
Principal SponsorUniversity Hospital Tuebingen
Study ContactNils B. Kroemer, Prof. Dr.More contacts
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

120 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 65 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

COVID-19Post-Acute COVID-19 SyndromePost-Infectious DisordersChronic DiseaseCoronaviridae InfectionsFatigueInfectionsLung DiseasesPathologic ProcessesPneumoniaPneumonia, ViralRespiratory Tract DiseasesRespiratory Tract InfectionsRNA Virus InfectionsSigns and SymptomsPathological Conditions, Signs and SymptomsVirus DiseasesCoronavirus InfectionsDisease AttributesNidovirales Infections

Criteria

Inclusion Criteria: * individuals who have previously tested positive for SARS-CoV-2 infection (preferred PCR-Test) or have a medically confirmed history of COVID-19 (preferred SARS-CoV-2 Antibody-test) and have persistent symptoms (including Post-COVID) . * clinical diagnoses made by physician: individuals are included with at least one persistent symptom for at least 4 weeks (Long-COVID) or at least 8 weeks (Post-COVID) following the SARS-CoV-2 infections, such as fatigue, shortness of breath, brain fog, headaches, irritability, cognitive difficulties, muscle or joint pain, sleep disturbances, etc. * Participants should not have an alternative explanation for their persistent symptoms, ruling out other medical or psychiatric conditions. Exclusion Criteria: * lack of capacity for consent * insufficient German language skills: Participants must have sufficient (B2 German) language skills to understand the informed consent form, study procedures, and questionnaires. * Intensive Care Unit treatment during COVID-19 infection * BMI \> 18.5 \& BMI \< 35 kg/m2 Lifetime (according to DSM 5): * brain injury, stroke, epilepsy, or history of seizures * schizophrenia * bipolar disorder * severe substance use disorders, except tobacco * cardiac arrhythmia, coronary heart disease * 12-month prevalence: pregnancy or nursing Additional exclusion criteria for a safe application of tVNS: * active implant (pacemaker, cochlear implant, implanted electrode device) and cerebral shunts * required permanent use of left-sided hearing aid * ear infections, open wounds, or impaired skin at electrode sites

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

2 intervention groups are designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Experimental
The cross-over design includes one group which starts with high-intensity stimulation (n = 40) and another group, who starts with low-intensity stimulation (n = 40). The first group receives at first high-intensity for 6 weeks, followed by a low-intensity stimulation phase for 6 weeks. To control for placebo effects, other forty individuals start with the 6-week low-intensity stimulation phase followed by 6 weeks of high-intensity tVNS stimulation phase.

Group II

Experimental
Another group of patients is included as a control group (n = 40) undergoing 'treatment as usual' for Long/Post Covid. This group of participants receive the same monitoring throughout their participation during 12 weeks as the Stimulation-Group. As there is no standardized treatment protocol for Long/Post Covid, 'treatment as usual' implies a supportive approach. This group of participants have the option to receive taVNS stimulation after participating in the study.

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Department of Psychiatry & Psychotherapy, University of Tübingen

Tübingen, GermanyOpen Department of Psychiatry & Psychotherapy, University of Tübingen in Google Maps
Recruiting soonOne Study Center