HealthyPhase 1NCT00204893
Evaluation of the Ocular Safety of Calcium Formate in Normal, Healthy Female Subjects
A Phase 1 study testing calcium formate in people with Healthy, run by University of Wisconsin, Madison at 1 site in United States.
Trial summary
This is a Phase I, single center, open-label study of the dietary supplement calcium formate in normal, healthy female subjects. The purpose of the study is to determine whether daily use of calcium formate is safe and whether it accumulates in the eye. Read more about this study
- Who is it for?
- Ages 18 to 65 years, women onlyHealthy volunteers can take part
- Conditions the study is for
- Healthy
- What is being tested?
- calcium formate
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 12 participants
- Where
- 1 siteUnited States
- Study dates
- Jul 2003to Mar 2007
- Phase
- Phase 1
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- Women only
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Healthy females
Who cannot join
- no ocular diseases
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Wisconsin Hospital and Clinics
Madison, Wisconsin, 53792
About this study
This is a Phase I, single center, open-label study of the dietary supplement calcium formate in normal, healthy female subjects. The purpose of the study is to determine whether daily use of calcium formate is safe and whether it accumulates in the eye.
Read the detailed description
This is a Phase I, single center, open-label study of the dietary supplement calcium formate in normal, healthy female subjects. The purpose of the study is to determine whether daily use of calcium formate is safe and whether it accumulates in the eye.
- Conditions
- Healthy
- Being tested
- calcium formate
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
calcium formateDrug
Calcium formate - Each uncoated white tablet will contain 650 mg of calcium formate, (equivalent to 200 mg elemental calcium). Nephro-Tech, LLC, will formulate and provide the calcium formate tablets for the study.
| Study group | Role | What they receive |
|---|---|---|
| Open label | Experimental | Each participant will be treated with three 3900 mg doses of calcium formate on each study day (i.e., days 1-14). Receives: Drug: calcium formate |
What is being measured
The primary outcome is the main question the study is designed to answer.
Vision Testing (refraction) over baseline
Participants will be refracted at baseline and the resultant lens correction will be used for testing visual acuity at all subsequent visits. If a participant's visual acuity drops 10 letters or more at any visit, the participant will be re-refracted and the visual acuity will be tested again with the new lens correction in place.
Measured: Up to 15 days
Change in Serum Formate Levels over baseline
To test for accumulation of formate, morning blood samples for determination of formate will be obtained at screening, prior to administration of the first dose of calcium formate on Study Days 1, 2, 3, and 8 and on day 15. Blood samples for determination of formate will also be obtained approximately 40-60 minutes after ingestion of the second dose on Study Days 1, 2 and 3.
Measured: Up to 15 days
Secondary outcomes (5)
Change in Visual Acuity over baseline
Based on retroilluminated Chart R from Ferris-Bailey Early Treatment Diabetic Retinopathy Study (ETDRS) distance visual acuity chart set.
Measured: Up to 15 days
Change in 100 Hue Vision Testing results over baseline
The FM-100 Hue test will be utilized to assess color vision at baseline and at the conclusion of the study. This test requires the arrangement of 100 discs of varying hues in an orderly sequence. The test requires 15 minutes to complete and is noninvasive. The test is scored by a computer.
Measured: Up to 15 days
Change in ERG/VEP over baseline
Change in electroretinography (ERG) and visual-evoked potential will be monitored over baseline.
Measured: Up to 15 days
Change in Visual Fields over baseline
Automated standardized Humphrey 24-2 visual fields will be performed using the SITA (Swedish Interactive Threshold Algorithm) protocol. This test is standard of care for the assessment and follow-up of optic nerve disorders such as glaucoma or optic neuropathy. It will be performed in the customary manner for evaluation of mean defect.
Measured: Up to 15 days
Fundus Photography
Stereoscopic color fundus photographs of both eyes will be taken with a 30 degree fundus camera at baseline, at day 2 and day 8 of study tablet administration 40-60 minutes after the second dose, and at study completion (day 15), early termination, or if a vision drop or AE occurs. These will be compared individually for changes including macular edema, retinal or optic nerve abnormalities or other abnormalities occurring from baseline.
Measured: Up to 15 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted20 Sep 2005 (estimated)
- Study startJul 2003
- Primary completionMar 2007
- Study completionMar 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for HealthyStudies of the same condition, open and under way.
- More trials run by University of Wisconsin, MadisonThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 12 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Wisconsin, Madison
- Sponsor type
- University, hospital or other
- Collaborators
- Nephro-Tech 1, LLC
- Responsible party
- Sponsor
- Investigators
- Michael M Altaweel, MD, Principal investigator, University of Wisconsin, Madison
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00204893
- Sponsor's protocol ID
- 2003-297
- Status last verified
- Mar 2019
- First submitted
- 12 Sep 2005
- Last updated
- 7 Mar 2019
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Altaweel MM, Hanzlik RP, Ver Hoeve JN, Eells J, Zhang B. Ocular and systemic safety evaluation of calcium formate as a dietary supplement. J Ocul Pharmacol Ther. 2009 Jun;25(3):223-30. doi: 10.1089/jop.2008.0128.
PubMed 19456257
Study at a glance
From the registry record, last updated by the sponsor on 7 Mar 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of the Ocular Safety of Calcium Formate in Normal, Healthy Female Subjects
- ClinicalTrials.gov ID
- NCT00204893
- Acronym / sponsor ID
- 2003-297
- Conditions
- Healthy
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 12 participants (actual)
- Lead sponsor
- University of Wisconsin, MadisonUniversity, hospital or other
- Collaborators
- Nephro-Tech 1, LLC
- Study start
- Jul 2003
- Primary completion
- Mar 2007 (actual)
- Study completion
- Mar 2007 (actual)
- First posted
- 20 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a Phase I, single center, open-label study of the dietary supplement calcium formate in normal, healthy female subjects. The purpose of the study is to determine whether daily use of calcium formate is safe and whether it accumulates in the eye.
Detailed description
This is a Phase I, single center, open-label study of the dietary supplement calcium formate in normal, healthy female subjects. The purpose of the study is to determine whether daily use of calcium formate is safe and whether it accumulates in the eye.
Study design
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Open label | Experimental | Drug: calcium formateEach participant will be treated with three 3900 mg doses of calcium formate on each study day (i.e., days 1-14). |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Healthy females
Key exclusion criteria (1 listed)
- no ocular diseases
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| calcium formateCalcium formate - Each uncoated white tablet will contain 650 mg of calcium formate, (equivalent to 200 mg elemental calcium). Nephro-Tech, LLC, will formulate and provide the calcium formate tablets for the study. | Drug | Open label |
Primary outcome
Vision Testing (refraction) over baseline
Time frame: Up to 15 days
Participants will be refracted at baseline and the resultant lens correction will be used for testing visual acuity at all subsequent visits. If a participant's visual acuity drops 10 letters or more at any visit, the participant will be re-refracted and the visual acuity will be tested again with the new lens correction in place.
Change in Serum Formate Levels over baseline
Time frame: Up to 15 days
To test for accumulation of formate, morning blood samples for determination of formate will be obtained at screening, prior to administration of the first dose of calcium formate on Study Days 1, 2, 3, and 8 and on day 15. Blood samples for determination of formate will also be obtained approximately 40-60 minutes after ingestion of the second dose on Study Days 1, 2 and 3.
5 secondary outcomes
Change in Visual Acuity over baseline
Time frame: Up to 15 days
Change in 100 Hue Vision Testing results over baseline
Time frame: Up to 15 days
Change in ERG/VEP over baseline
Time frame: Up to 15 days
Change in Visual Fields over baseline
Time frame: Up to 15 days
Fundus Photography
Time frame: Up to 15 days
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Mar 2019.
- Results publication: PubMed 19456257Altaweel MM, Hanzlik RP, Ver Hoeve JN, Eells J, Zhang B. Ocular and systemic safety evaluation of calcium formate as a dietary supplement. J Ocul Pharmacol Ther. 2009 Jun;25(3):223-30. doi: 10.1089/jop.2008.0128.
Related trials for Healthy
Recruiting
THE EFFECTS OF GAME-BASED EXERCISE PROGRAMS
Physical Activity, Body Image
Not yet recruitingPhase 1
A Phase I Study of GLR2053 Tablets in Chinese Healthy Adult Participants
Atopic Dermatitis
Recruiting
Colon-delivered Riboflavin and Gut Microbiota Composition
Microbiome Dysbiosis, Gut Health
Not yet recruiting
Neuroergonomic Analysis of a Brain-Computer Interface Device (BCI)
Healthy Volunteers - Male and Female
RecruitingPhase 1
First-in-Human Trial to Assess REGN20423 in Healthy Adult Participants and Adult Participants With Atopic Dermatitis
Healthy Volunteer, Atopic Dermatitis
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Michael M Altaweel, MD principal investigator
University of Wisconsin, Madison
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing calcium formate in people with Healthy, run by University of Wisconsin, Madison at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Mar 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Vision Testing (refraction) over baseline (time frame: Up to 15 days). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00204893, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Mar 2019.