NCT03924414CompletedPhase 4
Trial of Parkinson's And Zoledronic Acid
TOPAZ: Trial of Parkinson's And Zoledronic Acid A Randomized Placebo-controlled Trial of Zoledronic Acid for the Prevention of Fractures in Patients With Parkinson's Disease
Source: ClinicalTrials.gov · Last updated 25 Jun 2026
Brief summary (registry, in English)
This home-based study is a randomized (1:1) placebo-controlled trial of a single infusion of zoledronic acid-5 mg (ZA) for the prevention of fractures in men and women aged 60 years and older with Parkinson's disease and parkinsonism with at least 2 years of follow-up. A total of 2650 participants will be enrolled and randomized in the United States. Participants, follow-up outcome assessors, and study investigators will be blinded to assigned study treatment. This trial is funded by the National Institute of Aging.
- Status (registry)
- Completed
- Phase (registry)
- Phase 4
- Study type
- Interventional
- Enrollment
- 2721 (actual)
- First submitted
- 2 Apr 2019
- Start date
- 15 Nov 2019
- Primary completion date
- 28 Feb 2026
- Lead sponsor
- California Pacific Medical Center Research Institute
- Diseases
- Lewy body dementia, Parkinson disease, Osteoporosis
- NCT number
- NCT03924414
What you commit to
- Study type: Interventional · Phase 4
- Participants enrolled: 2721
- From 15 Nov 2019 to the primary completion date, 28 Feb 2026
- 76 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Any use of a bisphosphonate drug within the last 12 months
- Any other criteria, which would make the patient unsuitable to participate in this study as determined by the study staff (e.g., an uncontrolled drug and/or alcohol addiction)
Other illness
- History of hip fracture
- A diagnosis of multiple myeloma or Paget's disease
Other
- Use of any other osteoporosis treatment (such as SERMs and denosumab) within the last 6 months
- Tooth extraction or invasive dental procedures within the past 30 days or planned/scheduled extraction/procedure in the next 12 months
- Non-ambulatory, i.e., unable to walk without assistance of another person.
- Undergoing kidney dialysis
- Unable to speak or read English sufficiently to complete informed consent
Who the study is looking for
- Men and women age 60 years or older
- Current Parkinson's Disease diagnosis or neurodegenerative parkinsonism diagnosis (including progressive supranuclear palsy, multiple system atrophy, cortical basal degeneration, vascular parkinsonism, dementia with Lewy bodies or another form of neurodegenerative parkinsonism) based on an expert assessment (neurologist diagnosis via medical records confirmation or Telemedicine Screening Assessment)
- Willing and able to continue in follow-up for at least 2 years
- Willing and able to provide informed consent
Age in the registry: 60 years to - · Sex: All · Does not accept healthy volunteers
Sites (76)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Albany Medical College Coordinator of this site? Confirm its status | Albany | United States | Unknown status |
| Morehouse School of Medicine Coordinator of this site? Confirm its status | Atlanta | United States | Unknown status |
| Emory University School of Medicine Coordinator of this site? Confirm its status | Atlanta | United States | Unknown status |
| Augusta University Coordinator of this site? Confirm its status | Augusta | United States | Unknown status |
| University of Colorado Denver Coordinator of this site? Confirm its status | Aurora | United States | Unknown status |
| Sutter Health Coordinator of this site? Confirm its status | Berkeley | United States | Unknown status |
| Boston University Coordinator of this site? Confirm its status | Boston | United States | Unknown status |
| Beth Israel Deaconess Medical Center Coordinator of this site? Confirm its status | Boston | United States | Unknown status |
| Massachusetts General Hospital Coordinator of this site? Confirm its status | Boston | United States | Unknown status |
| University of Vermont Coordinator of this site? Confirm its status | Burlington | United States | Unknown status |
| Medical University of South Carolina Coordinator of this site? Confirm its status | Charleston | United States | Unknown status |
| Loyola University Coordinator of this site? Confirm its status | Chicago | United States | Unknown status |
| Cook County Health & Hospitals System Coordinator of this site? Confirm its status | Chicago | United States | Unknown status |
| RUSH University Coordinator of this site? Confirm its status | Chicago | United States | Unknown status |
| Northwestern Medicine Coordinator of this site? Confirm its status | Chicago | United States | Unknown status |
| University of Chicago Coordinator of this site? Confirm its status | Chicago | United States | Unknown status |
| University of Cincinnati Coordinator of this site? Confirm its status | Cincinnati | United States | Unknown status |
| Case Western Reserve University, UH Cleveland Coordinator of this site? Confirm its status | Cleveland | United States | Unknown status |
| The Ohio State University Coordinator of this site? Confirm its status | Columbus | United States | Unknown status |
| University of Texas Southwestern Medical Center Coordinator of this site? Confirm its status | Dallas | United States | Unknown status |
| Duke University Coordinator of this site? Confirm its status | Durham | United States | Unknown status |
| Michigan State University Coordinator of this site? Confirm its status | East Lansing | United States | Unknown status |
| Stony Brook University Medical Center Coordinator of this site? Confirm its status | East Setauket | United States | Unknown status |
| University of Connecticut Coordinator of this site? Confirm its status | Farmington | United States | Unknown status |
| QUEST Research Institute Coordinator of this site? Confirm its status | Farmington Hills | United States | Unknown status |
| Washington Regional Medical Center Coordinator of this site? Confirm its status | Fayetteville | United States | Unknown status |
| Parkinson's and Movement Disorder Institute Coordinator of this site? Confirm its status | Fountain Valley | United States | Unknown status |
| University of Florida Coordinator of this site? Confirm its status | Gainesville | United States | Unknown status |
| Northwell Health Coordinator of this site? Confirm its status | Glen Cove | United States | Unknown status |
| St. Mary's Medical Center Coordinator of this site? Confirm its status | Grand Junction | United States | Unknown status |
| Northwell Health Coordinator of this site? Confirm its status | Great Neck | United States | Unknown status |
| Hartford Healthcare Coordinator of this site? Confirm its status | Hartford | United States | Unknown status |
| Edward Hines Jr VA Hospital Coordinator of this site? Confirm its status | Hines | United States | Unknown status |
| Queens Medical Center Coordinator of this site? Confirm its status | Honolulu | United States | Unknown status |
| University of Texas Health Houston Medical Center Coordinator of this site? Confirm its status | Houston | United States | Unknown status |
| Houston Methodist Neurological Institute Coordinator of this site? Confirm its status | Houston | United States | Unknown status |
| University of California, Irvine Coordinator of this site? Confirm its status | Irvine | United States | Unknown status |
| Mayo Clinic Coordinator of this site? Confirm its status | Jacksonville | United States | Unknown status |
| University of Kansas Medical Center Coordinator of this site? Confirm its status | Kansas City | United States | Unknown status |
| Booth Gardner Parkinson's Care Center at EvergreenHealth Coordinator of this site? Confirm its status | Kirkland | United States | Unknown status |
| Dartmouth Hitchcock Medical Center Coordinator of this site? Confirm its status | Lebanon | United States | Unknown status |
| University of Kentucky Coordinator of this site? Confirm its status | Lexington | United States | Unknown status |
| University of Arkansas for Medical Sciences Coordinator of this site? Confirm its status | Little Rock | United States | Unknown status |
| Loma Linda University Coordinator of this site? Confirm its status | Loma Linda | United States | Unknown status |
| Cedars-Sinai Medical Center Coordinator of this site? Confirm its status | Los Angeles | United States | Unknown status |
| University of California, Los Angeles Coordinator of this site? Confirm its status | Los Angeles | United States | Unknown status |
| Valley Parkinson Clinic Coordinator of this site? Confirm its status | Los Gatos | United States | Unknown status |
| University of Wisconsin Coordinator of this site? Confirm its status | Madison | United States | Unknown status |
| Northwell Health Coordinator of this site? Confirm its status | Manhasset | United States | Unknown status |
| Veracity Neuroscience LLC Coordinator of this site? Confirm its status | Memphis | United States | Unknown status |
| University of Miami Coordinator of this site? Confirm its status | Miami | United States | Unknown status |
| Parkinson's Foundation Coordinator of this site? Confirm its status | Miami | United States | Unknown status |
| Intermountain Medical Center Coordinator of this site? Confirm its status | Murray | United States | Unknown status |
| Vanderbilt University Medical Center Coordinator of this site? Confirm its status | Nashville | United States | Unknown status |
| Ochsner Health System Coordinator of this site? Confirm its status | New Orleans | United States | Unknown status |
| Columbia University Coordinator of this site? Confirm its status | New York | United States | Unknown status |
| Mount Sinai Beth Israel Coordinator of this site? Confirm its status | New York | United States | Unknown status |
| Weill Cornell Medicine Coordinator of this site? Confirm its status | New York | United States | Unknown status |
| New York University Langone Health Coordinator of this site? Confirm its status | New York | United States | Unknown status |
| Parkinson's Disease and Movement Disorder Center of Silicon Valley Coordinator of this site? Confirm its status | Palo Alto | United States | Unknown status |
| University of Pennsylvania Coordinator of this site? Confirm its status | Philadelphia | United States | Unknown status |
| Thomas Jefferson University Coordinator of this site? Confirm its status | Philadelphia | United States | Unknown status |
| University of Pittsburgh Coordinator of this site? Confirm its status | Pittsburgh | United States | Unknown status |
| Oregon Health Science University Coordinator of this site? Confirm its status | Portland | United States | Unknown status |
| University of California, Riverside Coordinator of this site? Confirm its status | Riverside | United States | Unknown status |
| Mayo Clinic Coordinator of this site? Confirm its status | Rochester | United States | Unknown status |
| University of Rochester Coordinator of this site? Confirm its status | Rochester | United States | Unknown status |
| University of California - Davis Coordinator of this site? Confirm its status | Sacramento | United States | Unknown status |
| Sutter Health Coordinator of this site? Confirm its status | Sacramento | United States | Unknown status |
| University of Utah Coordinator of this site? Confirm its status | Salt Lake City | United States | Unknown status |
| University of Texas Health Science Center at San Antonio Coordinator of this site? Confirm its status | San Antonio | United States | Unknown status |
| University of California San Francisco Coordinator of this site? Confirm its status | San Francisco | United States | Unknown status |
| Mayo Clinic Coordinator of this site? Confirm its status | Scottsdale | United States | Unknown status |
| Stony Brook University Medical Center Coordinator of this site? Confirm its status | Stony Brook | United States | Unknown status |
| Wake Forest University Coordinator of this site? Confirm its status | Winston-Salem | United States | Unknown status |
| Lankenau Medical Center Coordinator of this site? Confirm its status | Wynnewood | United States | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.