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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
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

Full criteria on ClinicalTrials.gov

Sites (76)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Albany Medical College
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AlbanyUnited StatesUnknown status
Morehouse School of Medicine
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AtlantaUnited StatesUnknown status
Emory University School of Medicine
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AtlantaUnited StatesUnknown status
Augusta University
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AugustaUnited StatesUnknown status
University of Colorado Denver
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AuroraUnited StatesUnknown status
Sutter Health
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BerkeleyUnited StatesUnknown status
Boston University
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BostonUnited StatesUnknown status
Beth Israel Deaconess Medical Center
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BostonUnited StatesUnknown status
Massachusetts General Hospital
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BostonUnited StatesUnknown status
University of Vermont
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BurlingtonUnited StatesUnknown status
Medical University of South Carolina
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CharlestonUnited StatesUnknown status
Loyola University
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ChicagoUnited StatesUnknown status
Cook County Health & Hospitals System
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ChicagoUnited StatesUnknown status
RUSH University
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ChicagoUnited StatesUnknown status
Northwestern Medicine
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ChicagoUnited StatesUnknown status
University of Chicago
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ChicagoUnited StatesUnknown status
University of Cincinnati
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CincinnatiUnited StatesUnknown status
Case Western Reserve University, UH Cleveland
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ClevelandUnited StatesUnknown status
The Ohio State University
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ColumbusUnited StatesUnknown status
University of Texas Southwestern Medical Center
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DallasUnited StatesUnknown status
Duke University
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DurhamUnited StatesUnknown status
Michigan State University
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East LansingUnited StatesUnknown status
Stony Brook University Medical Center
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East SetauketUnited StatesUnknown status
University of Connecticut
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FarmingtonUnited StatesUnknown status
QUEST Research Institute
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Farmington HillsUnited StatesUnknown status
Washington Regional Medical Center
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FayettevilleUnited StatesUnknown status
Parkinson's and Movement Disorder Institute
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Fountain ValleyUnited StatesUnknown status
University of Florida
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GainesvilleUnited StatesUnknown status
Northwell Health
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Glen CoveUnited StatesUnknown status
St. Mary's Medical Center
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Grand JunctionUnited StatesUnknown status
Northwell Health
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Great NeckUnited StatesUnknown status
Hartford Healthcare
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HartfordUnited StatesUnknown status
Edward Hines Jr VA Hospital
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HinesUnited StatesUnknown status
Queens Medical Center
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HonoluluUnited StatesUnknown status
University of Texas Health Houston Medical Center
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HoustonUnited StatesUnknown status
Houston Methodist Neurological Institute
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HoustonUnited StatesUnknown status
University of California, Irvine
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IrvineUnited StatesUnknown status
Mayo Clinic
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JacksonvilleUnited StatesUnknown status
University of Kansas Medical Center
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Kansas CityUnited StatesUnknown status
Booth Gardner Parkinson's Care Center at EvergreenHealth
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KirklandUnited StatesUnknown status
Dartmouth Hitchcock Medical Center
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LebanonUnited StatesUnknown status
University of Kentucky
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LexingtonUnited StatesUnknown status
University of Arkansas for Medical Sciences
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Little RockUnited StatesUnknown status
Loma Linda University
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Loma LindaUnited StatesUnknown status
Cedars-Sinai Medical Center
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Los AngelesUnited StatesUnknown status
University of California, Los Angeles
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Los AngelesUnited StatesUnknown status
Valley Parkinson Clinic
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Los GatosUnited StatesUnknown status
University of Wisconsin
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MadisonUnited StatesUnknown status
Northwell Health
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ManhassetUnited StatesUnknown status
Veracity Neuroscience LLC
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MemphisUnited StatesUnknown status
University of Miami
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MiamiUnited StatesUnknown status
Parkinson's Foundation
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MiamiUnited StatesUnknown status
Intermountain Medical Center
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MurrayUnited StatesUnknown status
Vanderbilt University Medical Center
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NashvilleUnited StatesUnknown status
Ochsner Health System
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New OrleansUnited StatesUnknown status
Columbia University
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New YorkUnited StatesUnknown status
Mount Sinai Beth Israel
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New YorkUnited StatesUnknown status
Weill Cornell Medicine
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New YorkUnited StatesUnknown status
New York University Langone Health
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New YorkUnited StatesUnknown status
Parkinson's Disease and Movement Disorder Center of Silicon Valley
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Palo AltoUnited StatesUnknown status
University of Pennsylvania
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PhiladelphiaUnited StatesUnknown status
Thomas Jefferson University
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PhiladelphiaUnited StatesUnknown status
University of Pittsburgh
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PittsburghUnited StatesUnknown status
Oregon Health Science University
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PortlandUnited StatesUnknown status
University of California, Riverside
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RiversideUnited StatesUnknown status
Mayo Clinic
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RochesterUnited StatesUnknown status
University of Rochester
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RochesterUnited StatesUnknown status
University of California - Davis
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SacramentoUnited StatesUnknown status
Sutter Health
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SacramentoUnited StatesUnknown status
University of Utah
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Salt Lake CityUnited StatesUnknown status
University of Texas Health Science Center at San Antonio
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San AntonioUnited StatesUnknown status
University of California San Francisco
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San FranciscoUnited StatesUnknown status
Mayo Clinic
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ScottsdaleUnited StatesUnknown status
Stony Brook University Medical Center
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Stony BrookUnited StatesUnknown status
Wake Forest University
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Winston-SalemUnited StatesUnknown status
Lankenau Medical Center
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WynnewoodUnited StatesUnknown status

This page is information, not medical advice. Discuss any trial with your doctor.