| Not Yet Recruiting | Characterising Sleep Disorders in Children With Tourette Syndrome NCT07450079 | Steffi Baker | — |
| Recruiting | Where Wild Things Grow: Nature- and Activity-based Group Interventions for Neurodivergent Children and Youth NCT07203469 | Sorlandet Hospital HF | N/A |
| Not Yet Recruiting | SCI-110 in the Treatment of Tourette Syndrome NCT05126888 | Neurothera Labs Inc. | Phase 2 |
| Recruiting | Cognitive-psychophysiological Treatment for Tics in Young People With Tourette's Syndrome With or Without Biof NCT06873841 | Université du Québec a Montréal | N/A |
| Recruiting | Trajectories of Change in Tourette Syndrome NCT06679790 | University of Minnesota | N/A |
| Recruiting | CBIT+TMS R33 Phase NCT06678737 | University of Minnesota | Phase 2 |
| Recruiting | Multimodal Electrophysiological Study of Cortico-subcortical Biomarkers of Tics in Tourette Syndrome NCT06909656 | University Hospital, Bordeaux | N/A |
| Recruiting | Effect of RNS in Treatment-refractory Tourette's Syndrome NCT06785532 | Xuanwu Hospital, Beijing | N/A |
| Recruiting | Sensorimotor and Psychosocial Trajectories in Adolescents With Tic Disorder NCT06576726 | Vanderbilt University Medical Center | — |
| Recruiting | Multitarget Stereotactic Electrophysiological Recording and Stimulation for Tourette Syndrome NCT06889480 | Beijing Tiantan Hospital | N/A |
| Recruiting | Effectiveness of Symptom Management Application on Parental Care Ability of Children With Tourette Syndrome NCT06613126 | National Taipei University of Nursing and Health Sciences | N/A |
| Recruiting | Sertraline vs. Placebo in the Treatment of Anxiety in Children and AdoLescents With NeurodevelopMental Disorde NCT06081348 | Holland Bloorview Kids Rehabilitation Hospital | Phase 2 |
| Active Not Recruiting | Efficacy and Safety of Gemlapodect (NOE-105) in Adults and Adolescents With Tourette Syndrome NCT06315751 | Noema Pharma AG | Phase 2 |
| Recruiting | A Multicenter Pediatric Deep Brain Stimulation Registry NCT06585618 | Boston Children's Hospital | — |
| Recruiting | Remote Delivery of a Mindfulness-based Intervention for Tics NCT06408662 | Johns Hopkins University | N/A |
| Recruiting | Epidemiology of Assertiveness and Emotion Management Disorders in People With Tourette's Syndrome NCT06136572 | University Hospital, Clermont-Ferrand | N/A |
| Recruiting | Multimodal Profiling of Response to Pediatric Comprehensive Behavioral Intervention for Tics NCT06194305 | University of Minnesota | Phase 2 |
| Recruiting | Washed Microbiota Transplantation for Tourette's Syndrome NCT03764748 | The Second Hospital of Nanjing Medical University | Phase 1 |
| Recruiting | Clinical Characteristics and Temporal Properties of Individual Tics in Persistent Tic Disorder NCT06385535 | University of Utah | N/A |
| Recruiting | Strengthening Tourette Treatment OPtions Using TMS to Improve CBIT, a Double-blind, Randomized, Controlled Stu NCT05705999 | West Virginia University | N/A |
| Recruiting | Internet-based Behavior Therapy for Adults With Tourette Syndrome NCT06271083 | Karolinska Institutet | N/A |
| Active Not Recruiting | A Study to Evaluate Long-term Safety of Ecopipam Tablets in Children, Adolescents and Adults With Tourette's D NCT06021522 | Emalex Biosciences Inc. | Phase 3 |
| Unknown | Evaluation of an Online Comprehensive Behavioral Intervention for Tics (CBIT) Therapist Training Program NCT05547854 | University of Utah | N/A |
| Withdrawn | D-cycloserine Augmented Treatment for Youth With Tic Disorders NCT04357951 | Johns Hopkins University | EARLY_Phase 1 |
| Completed | Tourette Discrimination (TD) Stigma Scale NCT05696769 | Wake Forest University Health Sciences | — |
| Withdrawn | New Stereotactic Frame System for Neurosurgery NCT04283812 | Mayo Clinic | N/A |
| Completed | Theta Burst Stimulation to Improve Inhibitory Motor Physiology in Tourette Syndrome NCT05628805 | Children's Hospital Medical Center, Cincinnati | N/A |
| Completed | Deep Brain Stimulation in Tourette Syndrome NCT06388291 | University College, London | N/A |
| Active Not Recruiting | Tourette Deep Brain Stimulation (DBS) Target Detection & Suppression NCT05371041 | University of Florida | N/A |
| Completed | Investigating Distress Tolerance in Adults With Tourette Syndrome NCT05047705 | Johns Hopkins University | N/A |
| Terminated | Atomoxetine in Patients With Tourette's Syndrome NCT04354103 | Poitiers University Hospital | Phase 2 |
| Completed | Investigations of the Pathophysiology of Gilles de la Tourette Syndrome. Part 1: Simultaneous PET and 3T MRI NCT05232955 | Max Planck Institute for Human Cognitive and Brain Sciences | — |
| Completed | Epidiolex in Obsessive Compulsive Disorder and Related Disorders NCT04978428 | University of Chicago | Phase 2 |
| Completed | Median Nerve Stimulation for Tourette Syndrome and Chronic Tic Disorder NCT05269953 | Nottingham University Hospitals NHS Trust | N/A |
| Unknown | Evaluate the Efficacy, Safety and Tolerability of TSUPPORT for Adults With Tourette Syndrome NCT05183594 | Tasly Pharmaceuticals, Inc. | N/A |
| Completed | A Study to Explore the Effect of Sepranolone in Tourette Syndrome NCT05434546 | Asarina Pharma | Phase 2 |
| Completed | Investigations of the Pathophysiology of Gilles de la Tourette Syndrome. Part 2: 7T MRI NCT05233306 | Max Planck Institute for Human Cognitive and Brain Sciences | — |
| Withdrawn | Safety of Cultured Allogeneic Adult Umbilical Cord Derived Mesenchymal Stem Cells for Tourette Syndrome NCT05158439 | The Foundation for Orthopaedics and Regenerative Medicine | Phase 1 |
| Completed | Combined CBIT and rTMS to Improve Tourette's Syndrome NCT04795908 | University of Florida | N/A |
| Completed | Open-label MNS for Tourette Syndrome NCT05016765 | Washington University School of Medicine | N/A |
| Recruiting | Longitudinal Impact of Stressors in Adults With Tourette Syndrome NCT04851678 | Vanderbilt University Medical Center | — |
| Enrolling By Invitation | Neural Correlates of Sensory Phenomena in Tourette Syndrome NCT03914664 | Vanderbilt University Medical Center | — |
| Completed | Median Nerve Stimulation Pilot NCT04731714 | Washington University School of Medicine | N/A |
| Unknown | Internet-based Cognitive Behavioral Therapy for Chronic Tic Disorder and Tourette's Disorder: a Feasibility Tr NCT04908969 | Karolinska Institutet | N/A |
| Completed | Influence of Stress and Psychiatric Symptoms on Children With Tourette Syndrome NCT04449003 | Vanderbilt University Medical Center | — |
| Completed | A Handwriting Intervention Program for Children With Tic Disorders NCT04246112 | University of Alabama at Birmingham | N/A |
| Recruiting | Observational Database on Deep Brain Stimulation in Tourette Syndrome NCT04449068 | Assistance Publique - Hôpitaux de Paris | — |
| Completed | Transcranial Magnetic Stimulation to Augment Behavior Therapy for Tics NCT04578912 | University of Minnesota | N/A |
| Completed | Extinction Learning in Adults With Tourette Syndrome NCT04498364 | Johns Hopkins University | N/A |
| Completed | The Effect of Medical Cannabis on Tics, Premonitory Urge and Psychiatric Comorbidity in Adults With Tourette S NCT05115318 | Tel-Aviv Sourasky Medical Center | — |
| Completed | Sensory Symptoms in Tourette Syndrome and Obsessive-Compulsive Disorder NCT04335175 | Vanderbilt University Medical Center | — |
| Withdrawn | Multi-site Transcranial Magnetic Stimulation Therapy of the Supplementary Motor Area in Children With Tourette NCT03642951 | Children's Mercy Hospital Kansas City | N/A |
| Completed | Ecopipam Tablets to Study Tourette's Syndrome in Children and Adolescents NCT04007991 | Emalex Biosciences Inc. | Phase 2 |
| Completed | Response Inhibition in Tourette Syndrome NCT03628703 | Children's Hospital Medical Center, Cincinnati | N/A |
| Recruiting | Sensory Symptoms in Tourette Syndrome NCT03851484 | Vanderbilt University Medical Center | — |
| Unknown | Deep Brain Stimulation in Forel's H Field in Tourette's Syndrome NCT04342754 | University of Sao Paulo General Hospital | N/A |
| Unknown | Outcomes Mandate National Integration With Cannabis as Medicine NCT03944447 | OMNI Medical Services, LLC | Phase 2 |
| Unknown | Exploration of Glutamatergic System With PET Radiotracer in Gilles de la Tourette Patients: Pilot Study (Gluta NCT03681795 | University Hospital, Toulouse | N/A |
| Completed | Pimavanserin Treatment in TS NCT04794413 | Joseph Jankovic | EARLY_Phase 1 |
| Completed | Online Mindfulness-based Tic Reduction (Phase Two) NCT03771235 | Bowdoin College | N/A |
| Terminated | Rollover Study for Continuing NBI-98854 Administration in Pediatric Subjects With Tourette Syndrome NCT03732534 | Neurocrine Biosciences | Phase 2 |
| Completed | Study of ABX-1431 in Adult Patients With Tourette Syndrome or Chronic Motor Tic Disorder NCT03625453 | Abide Therapeutics | Phase 2 |
| Unknown | A Study to Examine the Efficacy of a Therapeutic THX-110 for Tourette Syndrome NCT03651726 | Neurothera Labs Inc. | Phase 2 |
| Completed | An Exploratory Study of Continuous Theta Burst Stimulation (cTBS) Based on fMRI in the Treatment of Tic Disord NCT04128397 | Second Affiliated Hospital, School of Medicine, Zhejiang University | N/A |
| Completed | A Study to Test if TEV-50717 is Effective in Relieving Tics Associated With Tourette Syndrome (TS) NCT03571256 | Teva Branded Pharmaceutical Products R&D, Inc. | Phase 3 |
| Terminated | Evaluation of Safety and Tolerability of Long-term TEV-50717 (Deutetrabenazine) for Treatment of Tourette Synd NCT03567291 | Teva Branded Pharmaceutical Products R&D, Inc. | Phase 3 |
| Completed | Online Remote Behavioural Intervention for Tics (ORBIT) NCT03483493 | Nottinghamshire Healthcare NHS Trust | N/A |
| Completed | Aripiprazole Oral Solution in the Treatment of Children and Adolescents With Tourette's Syndrome NCT03487783 | Otsuka Beijing Research Institute | Phase 3 |
| Completed | Impulse Control in Gilles de la Tourette Syndrome NCT04197804 | I.R.C.C.S Ospedale Galeazzi-Sant'Ambrogio | — |
| Unknown | tDCS in Tourette (TIC-TDCS) NCT03401996 | University of Calgary | N/A |
| Terminated | Safety and Efficacy of NBI-98854 in Pediatric Subjects With Tourette Syndrome NCT03530293 | Neurocrine Biosciences | Phase 2 |
| Terminated | Gilles de la Tourette Syndrome (TS) and Seasonality NCT04076852 | I.R.C.C.S Ospedale Galeazzi-Sant'Ambrogio | — |
| Completed | CANNAbinoids in the Treatment of TICS (CANNA-TICS) NCT03087201 | Hannover Medical School | Phase 3 |
| Completed | Online Mindfulness-based Tic Reduction NCT03525626 | Bowdoin College | N/A |
| Completed | Open-Label Safety and Tolerability Study of NBI-98854 for the Treatment of Pediatric Subjects With Tourette Sy NCT03444038 | Neurocrine Biosciences | Phase 2 |
| Completed | Alternatives for Reducing Tics in Tourette Syndrome (TS): A Study of TEV-50717 (Deutetrabenazine) for the Trea NCT03452943 | Teva Branded Pharmaceutical Products R&D, Inc. | Phase 2 / Phase 3 |
| Completed | Role of Frontal Cortex in the Pathophysiology of Gilles de la Tourette Syndrome (GTS) NCT03604510 | University Hospital, Bordeaux | N/A |
| Terminated | Safety and Efficacy of Cannabis in Tourette Syndrome NCT03247244 | University Health Network, Toronto | Phase 2 |
| Completed | Safety, Tolerability, and Efficacy of NBI-98854 for the Treatment of Pediatric Subjects With Tourette Syndrome NCT03325010 | Neurocrine Biosciences | Phase 2 |
| Unknown | The Role of Probiotics PS128 in Movement Disorders NCT03259971 | National Taiwan University Hospital | N/A |
| Completed | Effects of Ondansetron in Obsessive-compulsive and Tic Disorders NCT03239210 | NYU Langone Health | Phase 4 |
| Completed | Behavioral Therapy for Tourette Syndrome NCT03019731 | Johns Hopkins University | N/A |
| Completed | A Study to Evaluate the Effects of ABX-1431 on Patients With Tourette Syndrome NCT03058562 | Abide Therapeutics | Phase 1 |
| Completed | Efficacy of a Therapeutic Combination of Dronabinol and PEA for Tourette Syndrome NCT03066193 | Yale University | Phase 2 |
| Unknown | The Safety and Efficacy of Long-term Treatment of PINS Stimulator System for Tourette Syndrome NCT02253498 | Beijing Pins Medical Co., Ltd | EARLY_Phase 1 |
| Completed | Impulsivity in Tourette Syndrome : Behavioral and Neuroimaging Study NCT02960698 | Institut National de la Santé Et de la Recherche Médicale, France | N/A |
| Completed | Trial to Demonstrate the Efficacy and Safety of Internet-delivered Behavioral Treatment for Adults With Tic Di NCT02605902 | Hannover Medical School | N/A |
| Completed | Incorporating teleCBIT Into a Hospital-Based Tic Program NCT04007913 | San Jose State University | N/A |
| Completed | Modified Comprehensive Behavioral Intervention for Tics (M_CBIT) NCT02900144 | Massachusetts General Hospital | N/A |
| Completed | Safety and Tolerability Study of NBI-98854 for the Treatment of Subjects With Tourette Syndrome NCT02879578 | Neurocrine Biosciences | Phase 2 |
| Completed | Computerized Working Memory Training in Children With ADHD and Comorbid Tourette Syndrome NCT02732496 | Massachusetts General Hospital | N/A |
| Completed | Evaluation of a Cognitive Psychophysiological Treatment for Tourette Syndrome and Tic Disorders NCT03225430 | Centre de Recherche de l'Institut Universitaire en santé Mentale de Montréal | N/A |
| Completed | Apathy in Tourette Syndrome and Changes in Quality of Life NCT02765178 | University of Florida | — |
| Completed | Safety and Efficacy Study of NBI-98854 in Children and Adolescents With Tourette Syndrome NCT02679079 | Neurocrine Biosciences | Phase 2 |
| Completed | Safety and Efficacy Study of NBI-98854 in Adults With Tourette Syndrome NCT02581865 | Neurocrine Biosciences | Phase 2 |
| Completed | Sensory Processing in Tourette Syndrome NCT02512406 | University of Florida | — |
| Completed | Transcranial Magnetic Stimulation for Children With Tourette's Syndrome NCT02356003 | University of Calgary | N/A |
| Unknown | Group Intervention for Children With Chronic Tics Syndrome or Tourette Syndrome: CBIT vs Psycho-Educational In NCT02407951 | Tel-Aviv Sourasky Medical Center | N/A |
| Withdrawn | A Trial Evaluating the Efficacy, Safety, and Pharmacokinetics of SNC-102 in Subjects With Tourette Syndrome NCT02217007 | Synchroneuron Inc. | Phase 2 |
| Unknown | The Effect and Safety of Plum-blossom Needle for Tourette Syndrome NCT02403258 | Guang'anmen Hospital of China Academy of Chinese Medical Sciences | N/A |
| Completed | Behavioral Therapy for Children and Adolescents With Tourette Syndrome NCT03621059 | Taipei Medical University | N/A |
| Completed | Safety, Pharmacokinetics, and Pharmacodynamics of NBI-98854 in Children and Adolescents With Tourette Syndrome NCT02256475 | Neurocrine Biosciences | Phase 1 |
| Completed | Brain Stimulation in Movement Disorders NCT02216474 | Birmingham and Solihull Mental Health NHS Foundation Trust | N/A |
| Completed | A Pilot Study Of SD-809 (Deutetrabenazine) In Moderate To Severe Tourette Syndrome (TS) NCT02674321 | Auspex Pharmaceuticals, Inc. | Phase 1 |
| Unknown | Parent Behavioral Training for Disruptive Behaviors in Tourette Syndrome NCT02882490 | Hospital Clinic of Barcelona | N/A |
| Terminated | FAAH Inhibitor Trial for Adults With Tourette Syndrome NCT02134080 | Yale University | Phase 1 |
| Completed | Thalamic Deep Brain Stimulation for Tourette Syndrome NCT03958617 | University of Cologne | Phase 2 / Phase 3 |
| Completed | Activity in Tourette Syndrome NCT02153463 | Children's Hospital of Eastern Ontario | N/A |
| Completed | Tourette Syndrome Deep Brain Stimulation NCT02056873 | University of Florida | N/A |
| Completed | Proof of Concept Study of an Oral Orthotic to Reduce Tic Severity in Chronic Tic Disorder and Tourette Syndrom NCT02067819 | Weill Medical College of Cornell University | N/A |
| Terminated | Thalamic Deep Brain Stimulation for the Treatment of Refractory Tourette Syndrome NCT01817517 | Johns Hopkins University | N/A |
| Unknown | Pilot Study for Use of Dysport in Treatment of Vocal Tics in Patients With Tourette's Syndrome NCT02187679 | Detroit Clinical Research Center | N/A |
| Unknown | The Pathophysiology of Tourette Syndrome: a Multimodal Study NCT02497807 | Second Affiliated Hospital, School of Medicine, Zhejiang University | — |
| Completed | Safety, Tolerability, Pharmacokinetic, and Efficacy Study of AZD5213 in Adolescents With Tourette's Disorder NCT01904773 | AstraZeneca | Phase 2 |
| Completed | VoIP Delivered Behavior Therapy for Tourette Syndrome NCT02247206 | University of Wisconsin, Milwaukee | Phase 2 |
| Completed | Open-Trial of EPI-743 for Adults With Tourette Syndrome NCT01719523 | Yale University | Phase 1 |
| Completed | Neurofeedback for Tourette Syndrome NCT01702077 | Yale University | N/A |
| Completed | Guanfacine in Children With Tic Disorders NCT01547000 | Yale University | Phase 4 |
| Completed | Subthalamic Stimulation in Tourette's Syndrome NCT02619084 | Fondazione I.R.C.C.S. Istituto Neurologico Carlo Besta | Phase 2 |
| Completed | Developing Cognitive Training for Tourette Syndrome NCT01440023 | University of Wisconsin, Milwaukee | Phase 1 |
| Completed | A Trial of Bilateral Deep Brain Stimulation to the Globus Pallidus Internum in Tourette Syndrome NCT01647269 | University College, London | Phase 2 |
| Completed | Repetitive Transcranial Magnetic Stimulation to Reduce Tics NCT01258790 | Children's Hospital Medical Center, Cincinnati | N/A |
| Completed | Assessment of Children With Tic Onset in the Past 6 Months NCT01177774 | Washington University School of Medicine | — |
| Active Not Recruiting | Outcomes of Cognitive Behavioral Therapy (CBT) Interventions Provided by Unlicensed Professionals NCT01075672 | Massachusetts General Hospital | N/A |
| Completed | MRI Study of Tic Remission in Tourette Syndrome NCT01405859 | University of Utah | — |
| Completed | Developing New Treatments for Tourette Syndrome: Therapeutic Trials With Modulators of Glutamatergic Neurotran NCT01018056 | Johns Hopkins University | Phase 4 |
| Completed | Brain Stimulation for the Treatment of Tourette Syndrome NCT01329198 | University of Florida | N/A |
| Terminated | Investigation of Neurofeedback With Real-Time fMRI in Healthy Volunteers and Patients With Hyperkinetic Moveme NCT00885040 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Completed | Role of the Sensory Experience in Generating Motor Tics in Tourette Syndrome NCT00755339 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Terminated | Pilot Study of the Modified Atkins Diet for Tourette Syndrome NCT00952601 | Johns Hopkins University | Phase 1 |
| Terminated | Open-label Extension Study of Pramipexole in the Treatment of Children and Adolescents With Tourette Syndrome NCT00681863 | Boehringer Ingelheim | Phase 3 |
| Completed | Pramipexole Pilot Phase II Study in Children and Adolescents With Tourette Disorder According to DSM-IV Criter NCT00558467 | Boehringer Ingelheim | Phase 2 |
| Completed | Phase III Study of 5LGr to Treat Tic Disorder NCT01501695 | Tasly Pharmaceuticals, Inc. | Phase 3 |
| Completed | Transcranial Magnetic Stimulation (TMS) for Individuals With Tourette's Syndrome NCT00529308 | Yale University | Phase 2 |
| Completed | Comparison of Keppra and Clonidine in the Treatment of Tics NCT00370838 | Harvey S. Singer | Phase 4 |
| Unknown | Sedation During Microelectrode Recordings Before Deep Brain Stimulation for Movement Disorders. NCT00355927 | Hadassah Medical Organization | N/A |
| Completed | Dopaminergic Effects on Cortical Function in Tourette's (Levodopa Protocol) NCT00634556 | Washington University School of Medicine | Phase 1 |
| Completed | Effectiveness of Behavior Therapy and Psychosocial Therapy for the Treatment of Tourette Syndrome and Chronic NCT00231985 | Massachusetts General Hospital | Phase 2 |
| Completed | Brain Activity Associated With Tics in Patients With Tourette Syndrome NCT00141869 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Completed | Thalamic Deep Brain Stimulation for Tourette Syndrome NCT00311909 | University Hospitals Cleveland Medical Center | Phase 2 |
| Completed | Cognitive Behavior Therapy and Habit Reversal Training for the Treatment of Chronic Tic Disorders in Children NCT00218777 | Tourette Association of America | Phase 2 / Phase 3 |
| Completed | An Open-label Study to Determine the Efficacy and Safety of Topiramate in the Treatment of Tourette Syndrome. NCT00206336 | Baylor College of Medicine | Phase 3 |
| Completed | A Randomized, Placebo-controlled, Tourette Syndrome Study. NCT00206323 | Baylor College of Medicine | Phase 3 |
| Completed | Timing of Voluntary Movement in Patients With Tourette Syndrome and Chronic Tic Disorder NCT00081419 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Completed | Brain Dynamics Involved in Generating Tics and Controlling Voluntary Movement NCT00056420 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Completed | Study of GABA-A Receptors in the Generation of Tics in Patients With Tourette's Syndrome NCT00034398 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Completed | Study of Tics in Patients With Tourette's Syndrome and Chronic Motor Tic Disorder NCT00033995 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Completed | Magnetic Resonance Spectroscopy to Evaluate Tourette s Syndrome NCT00030953 | National Institute of Neurological Disorders and Stroke (NINDS) | — |
| Completed | Anger Control Training for Youth With Tourette Syndrome NCT00486551 | Yale University | N/A |
| Completed | Methylphenidate for Treating Children With ADHD and Tourette Syndrome NCT00441649 | Stony Brook University | N/A |
| Completed | Evaluation and Follow-up of Individuals With Obsessive-Compulsive Disorder and Related Conditions NCT00004550 | National Institute of Mental Health (NIMH) | — |
| Completed | I-123 Brain Studies of Serotonin Metabolism in Psychiatric Patients and Normal Volunteers NCT00001771 | National Institute of Mental Health (NIMH) | — |
| Completed | Phase II Double Blind Placebo Controlled Trial of Risperidone in Tourette Syndrome NCT00004393 | National Center for Research Resources (NCRR) | Phase 2 |
| Completed | Randomized Study of Pergolide in Children With Tourette Syndrome NCT00004433 | Children's Hospital Medical Center, Cincinnati | N/A |
| Completed | Phase III Randomized, Double-Blind, Placebo-Controlled Study of Guanfacine for Tourette Syndrome and Attention NCT00004376 | National Center for Research Resources (NCRR) | Phase 3 |
| Completed | Phase II Pilot Controlled Study of Short Vs Longer Term Pimozide (Orap) Therapy in Tourette Syndrome NCT00004652 | National Center for Research Resources (NCRR) | Phase 2 |
| Terminated | Central Mechanisms in Speech Motor Control Studied With H215O PET NCT00001308 | National Institute on Deafness and Other Communication Disorders (NIDCD) | — |
| Completed | Developmental Phenomenology of Obsessive Compulsive Disorder and Tourette Syndrome in Children and Adolescents NCT00004324 | National Center for Research Resources (NCRR) | — |
| Completed | Study of the Neurobiology of Tourette Syndrome and Related Disorders NCT00004325 | National Center for Research Resources (NCRR) | — |
| Unknown | National Gilles De La Tourette Study Group NCT00169351 | Groupe Hospitalier Pitie-Salpetriere | — |