| NCT Number | Conditions | Interventions | Sponsor/Collaborators | Phases | Start Date | Last Updated |
| NCT00000333 | Cocaine-Related Disorders | Drug: Benztropine | National Institute on Drug Abuse (NIDA)|Washington D.C. Veterans Affairs Medical Center | Phase 2 | 2001-05-01 | 2017-02-23 |
| NCT00715377 | Schizophrenia|Schizoaffective Disorder|Schizophreniform Disorder|Delusional Disorder|Psychotic Disorders | Drug: Benztropine | Centre for Addiction and Mental Health | | 2007-06-01 | 2015-08-21 |
| NCT00018200 | Back Pain|Sciatica | Drug: Desipramine|Drug: Fluoxetine|Drug: Benztropine | VA Office of Research and Development | Phase 2 | 1999-04-01 | 2012-06-04 |
| NCT00457366 | Agitation | Drug: Quetiapine|Drug: Cocktail (Haloperidol, Lorazepam, Cogentin) | University of Southern California|AstraZeneca | Phase 4 | 2006-05-01 | 2014-01-29 |
| NCT00000793 | HIV Infections|Peripheral Nervous System Disease | Drug: Mexiletine hydrochloride|Drug: Benztropine mesylate|Drug: Amitriptyline hydrochloride | National Institute of Allergy and Infectious Diseases (NIAID)|Boehringer Ingelheim | Phase 2 | null | 2012-04-02 |
| NCT00964886 | Back Pain | Behavioral: cognitive behavioral therapy|Drug: desipramine hydrochloride|Behavioral: cognitive behavioral therapy|Drug: benztropine mesylate 0.125 mg daily|Drug: desipramine hydrochloride | VA Office of Research and Development|University of California, San Diego | Phase 2 | 2010-01-01 | 2016-11-23 |
| NCT00802100 | Schizophrenia | Drug: Olanzapine|Drug: Perphenazine|Drug: Aripiprazole|Drug: Metformin|Drug: Simvastatin|Drug: Benztropine | National Institute of Mental Health (NIMH) | Phase 4 | 2008-12-01 | 2013-01-03 |
| NCT00167856 | Neuropathic Pain|Pain|Spinal Cord Injuries | Drug: Venalafaxine hydrochloride | VA Office of Research and Development | | 2005-06-01 | 2014-03-26 |
| NCT00009672 | Radiculopathy|Sciatica | Drug: Nortriptyline|Drug: Morphine | National Institute of Dental and Craniofacial Research (NIDCR)|National Institutes of Health Clinical Center (CC) | Phase 2 | 2001-01-30 | 2017-01-24 |
| NCT01833897 | Bipolar Disorder | Drug: Standard of Care|Drug: Ketamine|Drug: D-cycloserine | New York State Psychiatric Institute | Phase 4 | 2013-03-01 | 2016-04-25 |
