Overactive BladderPhase 2NCT05557279
Urinary Microbiome Changes Following Administration of 500 mg of NDS-446 in Women With Dry OAB at 12 Weeks
A Phase 2 study testing 500 mg NDS-446 in people with Overactive Bladder, run by Loyola University at 1 site in United States.
Trial summary
The purpose of this study is to learn about how the use of 500 mg of dried cranberry powder extract (NDS-446) changes the bacteria that normal reside in the bladder of women who don't have urinary leakage problems but do have problems with urinary urgency and frequency. Read more about this study
- Who is it for?
- Ages 18 to 99 years, women only
- Conditions the study is for
- Overactive Bladder
- What is being tested?
- 500 mg NDS-446
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 53 participants
- Where
- 1 siteUnited States
- Study dates
- 1 Jan 2023to 11 Aug 2025
- Phase
- Phase 2
- 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 99 years
- Women only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- 18 years, female, ambulatory
- OAB symptoms > 6 months
- Voiding frequency > 8 times in 24 hrs and > 3 episodes of urgency (grade 3 or 4) without incontinence during 3-day diary at baseline
Who cannot join
- Self-reported urinary incontinence (> 3 episodes in the month prior)
- UTI > 3 in last 12 months
- A diagnosis of painful bladder syndrome or interstitial cystitis
- LUT surgery last 6 months
- Drug or non-drug treatment of OAB (previous 60 days) or current meds that affect detrusor activity
- On Warfarin
Show all 12Show fewer
- Failure to complete 3-day diary
- Aspirin > 81 mg daily
- Gross hematuria
- Allergy or sensitivity to aspirin
- Subjects taking anti-platelet agents
- Inability to swallow capsules
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Urinary Microbiome Changes Following Administration of 500 mg of NDS-446 in Women With Dry OAB at 12 Weeks - a Single-center Study
The purpose of this study is to learn about how the use of 500 mg of dried cranberry powder extract (NDS-446) changes the bacteria that normal reside in the bladder of women who don't have urinary leakage problems but do have problems with urinary urgency and frequency.
Read the detailed description
While this treatment algorithm is the recommended approach to OAB management, recent research has resulted in the development of a new paradigm that may influence how this condition is treated in the future. This research focuses on the urinary microbiome and for a decade it has been known that urine is not sterile. Expanded Quantitative Urine Culture (EQUC) techniques have allowed for more comprehensive and accurate 16S ribosomal RNA sequencing of the urinary microbiome. Changes in the abundance and diversity of the resident microbiota have been associated with a number of urogenital conditions including interstitial cystitis, urinary incontinence, responses to OAB medications and symptoms of urinary tract infections. These studies provide insight to the fact that the microbiome plays an important role in the maintenance of a healthy urogenital tract. Thus, treatments that target the microbiome for one condition may work for others by similar mechanisms, especially when there is considerable symptom overlap between the two conditions as there is in UTIs and OAB.
One such treatment is cranberry (Vaccinium macrocarpon) extract, which has long been used as complementary therapy for a variety of medical conditions. Health benefits are linked to the presence of phytochemicals present in the fruit- anthocyanins, flavonols, tannins, proanthocyanidins, and phenolic acid derivatives. Cranberry is known to be effective in the prevention of UTIs. In a recent study examining its use in women with dry OAB, daily dried cranberry improved urgency symptoms and number of daytime voids. In addition, the authors reported an improvement in the validated subjective instrument, Patient Perception of Bladder Condition (PPBC). Moderately symptomatic LUTS in men improved following 6 months of daily dried cranberry powder. Therefore, the investigators aim to investigate changes to the female urinary microbiome in women with dry OAB who take daily dried cranberry extract. This study aims to quantify a change in urinary frequency, urinary urgency, and PPBC following the daily use of a cranberry extract called NDS-446. The investigators also have an ancillary hypothesis that women who are post-menopausal will develop a urinary microbiome more similar to pre-menopausal women by the end of the study. Lastly, the investigators will measure the levels of extracellular (eATP) in the urine of participants. It has been previously shown that higher levels of eATP are associated with worsening OAB symptoms.
- Conditions
- Overactive Bladder
- Being tested
- 500 mg NDS-446
- Medical subject headings
- Urinary Bladder, Overactive
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
500 mg NDS-446Drug
All participants will receive 500 mg NDS-446 daily for 12 weeks following a baseline assessment
| Study group | Role | What they receive |
|---|---|---|
| Intervention Group | Other | All participants will receive 500 mg NDS-446 daily for 12 weeks Receives: Drug: 500 mg NDS-446 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Compare the UG microbiota (vagina, peri-urethral, catheterized and voided urine) of female participants with urgency-frequency syndrome after 12 weeks of daily use of 500 mg of NDS-446 to the UG microbiota at baseline.
Vaginal and peri-urethral swabs, as well as voided and catheterized urine specimens, will be obtained.
Measured: 12 week visit
Secondary outcomes (1)
Compare the baseline and 12 week PPBC score in pre-menopausal and post-menopausal who take 500 mg of NDS-446 daily.
The Patient Perception of Bladder Condition (PPBC) score in the study participants.
Measured: 12 week visit
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Sep 2022
- Study start1 Jan 2023
- Primary completion11 Aug 2025
- Study completion11 Aug 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (27)Papers the sponsor has linked to this study.
- Other trials for Overactive BladderStudies of the same condition, open and under way.
- 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 2
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- All participants will receive 500 mg NDS-446 daily for 12 weeks following a baseline assessment and meeting inclusion/exclusion criteria 20 premenopausal women, 20 postmenopausal women not on estrogen supplementation
- Masking
- None (open label)
- Enrolment
- 53 participants (actual)
Sponsor and investigators
- Lead sponsor
- Loyola University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Thythy Pham, Loyola University
- Investigators
- Elizabeth Mueller, MD, Principal investigator, Loyola Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05557279
- Sponsor's protocol ID
- 215838
- Status last verified
- Dec 2025
- First submitted
- 12 Sep 2022
- Last updated
- 17 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Haylen BT, de Ridder D, Freeman RM, Swift SE, Berghmans B, Lee J, Monga A, Petri E, Rizk DE, Sand PK, Schaer GN; International Urogynecological Association; International Continence Society. An International Urogynecological Association (IUGA)/International Continence Society (ICS) joint report on the terminology for female pelvic floor dysfunction. Neurourol Urodyn. 2010;29(1):4-20. doi: 10.1002/nau.20798.
PubMed 19941278Abrams P, Cardozo L, Fall M, Griffiths D, Rosier P, Ulmsten U, Van Kerrebroeck P, Victor A, Wein A; Standardisation Sub-Committee of the International Continence Society. The standardisation of terminology in lower urinary tract function: report from the standardisation sub-committee of the International Continence Society. Urology. 2003 Jan;61(1):37-49. doi: 10.1016/s0090-4295(02)02243-4. No abstract available.
PubMed 12559262Stewart WF, Van Rooyen JB, Cundiff GW, Abrams P, Herzog AR, Corey R, Hunt TL, Wein AJ. Prevalence and burden of overactive bladder in the United States. World J Urol. 2003 May;20(6):327-36. doi: 10.1007/s00345-002-0301-4. Epub 2002 Nov 15.
PubMed 12811491Irwin DE, Milsom I, Hunskaar S, Reilly K, Kopp Z, Herschorn S, Coyne K, Kelleher C, Hampel C, Artibani W, Abrams P. Population-based survey of urinary incontinence, overactive bladder, and other lower urinary tract symptoms in five countries: results of the EPIC study. Eur Urol. 2006 Dec;50(6):1306-14; discussion 1314-5. doi: 10.1016/j.eururo.2006.09.019. Epub 2006 Oct 2.
PubMed 17049716Milsom I, Kaplan SA, Coyne KS, Sexton CC, Kopp ZS. Effect of bothersome overactive bladder symptoms on health-related quality of life, anxiety, depression, and treatment seeking in the United States: results from EpiLUTS. Urology. 2012 Jul;80(1):90-6. doi: 10.1016/j.urology.2012.04.004.
PubMed 22748867Gormley EA, Lightner DJ, Faraday M, Vasavada SP; American Urological Association; Society of Urodynamics, Female Pelvic Medicine. Diagnosis and treatment of overactive bladder (non-neurogenic) in adults: AUA/SUFU guideline amendment. J Urol. 2015 May;193(5):1572-80. doi: 10.1016/j.juro.2015.01.087. Epub 2015 Jan 23.
PubMed 25623739Madhuvrata P, Cody JD, Ellis G, Herbison GP, Hay-Smith EJ. Which anticholinergic drug for overactive bladder symptoms in adults. Cochrane Database Syst Rev. 2012 Jan 18;1(1):CD005429. doi: 10.1002/14651858.CD005429.pub2.
PubMed 22258963Coupland CAC, Hill T, Dening T, Morriss R, Moore M, Hippisley-Cox J. Anticholinergic Drug Exposure and the Risk of Dementia: A Nested Case-Control Study. JAMA Intern Med. 2019 Aug 1;179(8):1084-1093. doi: 10.1001/jamainternmed.2019.0677.
PubMed 31233095Chapple CR, Nazir J, Hakimi Z, Bowditch S, Fatoye F, Guelfucci F, Khemiri A, Siddiqui E, Wagg A. Persistence and Adherence with Mirabegron versus Antimuscarinic Agents in Patients with Overactive Bladder: A Retrospective Observational Study in UK Clinical Practice. Eur Urol. 2017 Sep;72(3):389-399. doi: 10.1016/j.eururo.2017.01.037. Epub 2017 Feb 11.
PubMed 28196724Wolfe AJ, Toh E, Shibata N, Rong R, Kenton K, Fitzgerald M, Mueller ER, Schreckenberger P, Dong Q, Nelson DE, Brubaker L. Evidence of uncultivated bacteria in the adult female bladder. J Clin Microbiol. 2012 Apr;50(4):1376-83. doi: 10.1128/JCM.05852-11. Epub 2012 Jan 25.
PubMed 22278835Siddiqui H, Nederbragt AJ, Lagesen K, Jeansson SL, Jakobsen KS. Assessing diversity of the female urine microbiota by high throughput sequencing of 16S rDNA amplicons. BMC Microbiol. 2011 Nov 2;11:244. doi: 10.1186/1471-2180-11-244.
PubMed 22047020Price TK, Dune T, Hilt EE, Thomas-White KJ, Kliethermes S, Brincat C, Brubaker L, Wolfe AJ, Mueller ER, Schreckenberger PC. The Clinical Urine Culture: Enhanced Techniques Improve Detection of Clinically Relevant Microorganisms. J Clin Microbiol. 2016 May;54(5):1216-22. doi: 10.1128/JCM.00044-16. Epub 2016 Mar 9.
PubMed 26962083Brubaker L, Nager CW, Richter HE, Visco A, Nygaard I, Barber MD, Schaffer J, Meikle S, Wallace D, Shibata N, Wolfe AJ. Urinary bacteria in adult women with urgency urinary incontinence. Int Urogynecol J. 2014 Sep;25(9):1179-84. doi: 10.1007/s00192-013-2325-2. Epub 2014 Feb 11.
PubMed 24515544Burnett LA, Hochstedler BR, Weldon K, Wolfe AJ, Brubaker L. Recurrent urinary tract infection: Association of clinical profiles with urobiome composition in women. Neurourol Urodyn. 2021 Aug;40(6):1479-1489. doi: 10.1002/nau.24707. Epub 2021 May 26.
PubMed 34036621Pearce MM, Zilliox MJ, Rosenfeld AB, Thomas-White KJ, Richter HE, Nager CW, Visco AG, Nygaard IE, Barber MD, Schaffer J, Moalli P, Sung VW, Smith AL, Rogers R, Nolen TL, Wallace D, Meikle SF, Gai X, Wolfe AJ, Brubaker L; Pelvic Floor Disorders Network. The female urinary microbiome in urgency urinary incontinence. Am J Obstet Gynecol. 2015 Sep;213(3):347.e1-11. doi: 10.1016/j.ajog.2015.07.009. Epub 2015 Jul 23.
PubMed 26210757
Study at a glance
From the registry record, last updated by the sponsor on 17 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Urinary Microbiome Changes Following Administration of 500 mg of NDS-446 in Women With Dry OAB at 12 Weeks - a Single-center Study
- ClinicalTrials.gov ID
- NCT05557279
- Acronym / sponsor ID
- 215838
- Conditions
- Overactive Bladder
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 53 participants (actual)
- Lead sponsor
- Loyola UniversityUniversity, hospital or other
- Study start
- 1 Jan 2023 (actual)
- Primary completion
- 11 Aug 2025 (actual)
- Study completion
- 11 Aug 2025 (actual)
- First posted
- 28 Sep 2022 (actual)
- 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.
The purpose of this study is to learn about how the use of 500 mg of dried cranberry powder extract (NDS-446) changes the bacteria that normal reside in the bladder of women who don't have urinary leakage problems but do have problems with urinary urgency and frequency.
Detailed description
While this treatment algorithm is the recommended approach to OAB management, recent research has resulted in the development of a new paradigm that may influence how this condition is treated in the future. This research focuses on the urinary microbiome and for a decade it has been known that urine is not sterile. Expanded Quantitative Urine Culture (EQUC) techniques have allowed for more comprehensive and accurate 16S ribosomal RNA sequencing of the urinary microbiome. Changes in the abundance and diversity of the resident microbiota have been associated with a number of urogenital conditions including interstitial cystitis, urinary incontinence, responses to OAB medications and symptoms of urinary tract infections. These studies provide insight to the fact that the microbiome plays an important role in the maintenance of a healthy urogenital tract. Thus, treatments that target the microbiome for one condition may work for others by similar mechanisms, especially when there is considerable symptom overlap between the two conditions as there is in UTIs and OAB.
One such treatment is cranberry (Vaccinium macrocarpon) extract, which has long been used as complementary therapy for a variety of medical conditions. Health benefits are linked to the presence of phytochemicals present in the fruit- anthocyanins, flavonols, tannins, proanthocyanidins, and phenolic acid derivatives. Cranberry is known to be effective in the prevention of UTIs. In a recent study examining its use in women with dry OAB, daily dried cranberry improved urgency symptoms and number of daytime voids. In addition, the authors reported an improvement in the validated subjective instrument, Patient Perception of Bladder Condition (PPBC). Moderately symptomatic LUTS in men improved following 6 months of daily dried cranberry powder. Therefore, the investigators aim to investigate changes to the female urinary microbiome in women with dry OAB who take daily dried cranberry extract. This study aims to quantify a change in urinary frequency, urinary urgency, and PPBC following the daily use of a cranberry extract called NDS-446. The investigators also have an ancillary hypothesis that women who are post-menopausal will develop a urinary microbiome more similar to pre-menopausal women by the end of the study. Lastly, the investigators will measure the levels of extracellular (eATP) in the urine of participants. It has been previously shown that higher levels of eATP are associated with worsening OAB symptoms.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- All participants will receive 500 mg NDS-446 daily for 12 weeks following a baseline assessment and meeting inclusion/exclusion criteria 20 premenopausal women, 20 postmenopausal women not on estrogen supplementation
| Arm | Type | Receives |
|---|---|---|
| Intervention Group | Other | Drug: 500 mg NDS-446All participants will receive 500 mg NDS-446 daily for 12 weeks |
Who may qualify
- Ages
- 18 to 99 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- 18 years, female, ambulatory
- OAB symptoms > 6 months
- Voiding frequency > 8 times in 24 hrs and > 3 episodes of urgency (grade 3 or 4) without incontinence during 3-day diary at baseline
Key exclusion criteria (12 listed)
- Self-reported urinary incontinence (> 3 episodes in the month prior)
- UTI > 3 in last 12 months
- A diagnosis of painful bladder syndrome or interstitial cystitis
- LUT surgery last 6 months
- Drug or non-drug treatment of OAB (previous 60 days) or current meds that affect detrusor activity
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 |
|---|---|---|
| 500 mg NDS-446All participants will receive 500 mg NDS-446 daily for 12 weeks following a baseline assessment | Drug | Intervention Group |
Primary outcome
Compare the UG microbiota (vagina, peri-urethral, catheterized and voided urine) of female participants with urgency-frequency syndrome after 12 weeks of daily use of 500 mg of NDS-446 to the UG microbiota at baseline.
Time frame: 12 week visit
Vaginal and peri-urethral swabs, as well as voided and catheterized urine specimens, will be obtained.
1 secondary outcome
Compare the baseline and 12 week PPBC score in pre-menopausal and post-menopausal who take 500 mg of NDS-446 daily.
Time frame: 12 week visit
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 17 Jun 2026.
- Results publication: PubMed 19941278Haylen BT, de Ridder D, Freeman RM, Swift SE, Berghmans B, Lee J, Monga A, Petri E, Rizk DE, Sand PK, Schaer GN; International Urogynecological Association; International Continence Society. An International Urogynecological Association (IUGA)/International Continence Society (ICS) joint report on the terminology for female pelvic floor dysfunction. Neurourol Urodyn. 2010;29(1):4-20. doi: 10.1002/nau.20798.
- Results publication: PubMed 12559262Abrams P, Cardozo L, Fall M, Griffiths D, Rosier P, Ulmsten U, Van Kerrebroeck P, Victor A, Wein A; Standardisation Sub-Committee of the International Continence Society. The standardisation of terminology in lower urinary tract function: report from the standardisation sub-committee of the International Continence Society. Urology. 2003 Jan;61(1):37-49. doi: 10.1016/s0090-4295(02)02243-4. No abstract available.
- Results publication: PubMed 12811491Stewart WF, Van Rooyen JB, Cundiff GW, Abrams P, Herzog AR, Corey R, Hunt TL, Wein AJ. Prevalence and burden of overactive bladder in the United States. World J Urol. 2003 May;20(6):327-36. doi: 10.1007/s00345-002-0301-4. Epub 2002 Nov 15.
- Results publication: PubMed 17049716Irwin DE, Milsom I, Hunskaar S, Reilly K, Kopp Z, Herschorn S, Coyne K, Kelleher C, Hampel C, Artibani W, Abrams P. Population-based survey of urinary incontinence, overactive bladder, and other lower urinary tract symptoms in five countries: results of the EPIC study. Eur Urol. 2006 Dec;50(6):1306-14; discussion 1314-5. doi: 10.1016/j.eururo.2006.09.019. Epub 2006 Oct 2.
- Results publication: PubMed 22748867Milsom I, Kaplan SA, Coyne KS, Sexton CC, Kopp ZS. Effect of bothersome overactive bladder symptoms on health-related quality of life, anxiety, depression, and treatment seeking in the United States: results from EpiLUTS. Urology. 2012 Jul;80(1):90-6. doi: 10.1016/j.urology.2012.04.004.
- Results publication: PubMed 25623739Gormley EA, Lightner DJ, Faraday M, Vasavada SP; American Urological Association; Society of Urodynamics, Female Pelvic Medicine. Diagnosis and treatment of overactive bladder (non-neurogenic) in adults: AUA/SUFU guideline amendment. J Urol. 2015 May;193(5):1572-80. doi: 10.1016/j.juro.2015.01.087. Epub 2015 Jan 23.
- Results publication: PubMed 22258963Madhuvrata P, Cody JD, Ellis G, Herbison GP, Hay-Smith EJ. Which anticholinergic drug for overactive bladder symptoms in adults. Cochrane Database Syst Rev. 2012 Jan 18;1(1):CD005429. doi: 10.1002/14651858.CD005429.pub2.
- Results publication: PubMed 31233095Coupland CAC, Hill T, Dening T, Morriss R, Moore M, Hippisley-Cox J. Anticholinergic Drug Exposure and the Risk of Dementia: A Nested Case-Control Study. JAMA Intern Med. 2019 Aug 1;179(8):1084-1093. doi: 10.1001/jamainternmed.2019.0677.
- Results publication: PubMed 28196724Chapple CR, Nazir J, Hakimi Z, Bowditch S, Fatoye F, Guelfucci F, Khemiri A, Siddiqui E, Wagg A. Persistence and Adherence with Mirabegron versus Antimuscarinic Agents in Patients with Overactive Bladder: A Retrospective Observational Study in UK Clinical Practice. Eur Urol. 2017 Sep;72(3):389-399. doi: 10.1016/j.eururo.2017.01.037. Epub 2017 Feb 11.
- Results publication: PubMed 22278835Wolfe AJ, Toh E, Shibata N, Rong R, Kenton K, Fitzgerald M, Mueller ER, Schreckenberger P, Dong Q, Nelson DE, Brubaker L. Evidence of uncultivated bacteria in the adult female bladder. J Clin Microbiol. 2012 Apr;50(4):1376-83. doi: 10.1128/JCM.05852-11. Epub 2012 Jan 25.
- Results publication: PubMed 22047020Siddiqui H, Nederbragt AJ, Lagesen K, Jeansson SL, Jakobsen KS. Assessing diversity of the female urine microbiota by high throughput sequencing of 16S rDNA amplicons. BMC Microbiol. 2011 Nov 2;11:244. doi: 10.1186/1471-2180-11-244.
- Results publication: PubMed 26962083Price TK, Dune T, Hilt EE, Thomas-White KJ, Kliethermes S, Brincat C, Brubaker L, Wolfe AJ, Mueller ER, Schreckenberger PC. The Clinical Urine Culture: Enhanced Techniques Improve Detection of Clinically Relevant Microorganisms. J Clin Microbiol. 2016 May;54(5):1216-22. doi: 10.1128/JCM.00044-16. Epub 2016 Mar 9.
- Individual participant dataSharing planned: No
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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.
Elizabeth Mueller, MD principal investigator
Loyola Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing 500 mg NDS-446 in people with Overactive Bladder, run by Loyola University 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 3 inclusion and 12 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 17 Jun 2026. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
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?
Compare the UG microbiota (vagina, peri-urethral, catheterized and voided urine) of female participants with urgency-frequency syndrome after 12 weeks of daily use of 500 mg of NDS-446 to the UG microbiota at baseline. (time frame: 12 week visit). 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 NCT05557279, which also lists 27 linked publications.
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 17 Jun 2026.