CClinicalTrials.gg
CompletedNCT04534491Updated Oct 20, 2020Results posted

Study to Gather Information About the Actual Use of an Adhesive Patch Placed on the Skin to Deliver Oxytrol Through the Skin Into the Bloodstream.

A Phase 3 interventional study of Oxybutynin (Oxytrol, BAY839380) in Overactive Bladder, sponsored by Bayer. Completed at 1 site in United States. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2020-10-20.

Sponsored by Bayer · Phase 3, Interventional, and Treatment

From the registry’s dates

  • Registered 10 years 3 months after the study started (first participant enrolled May 2010, registered Aug 2020).
Phase
Phase 3
Study type
Interventional
Enrollment
855
Allocation
Not applicable
Ages
18 Years and older
Sex
Female
01

Study summary

With this study researchers want to gather information about the consumer use behavior of Oxytrol in a simulated setting in which the medicine is sold directly to a consumer without a prescription from a healthcare professional. An area of focus was on the potential benefits of an over-the-counter status for Oxytrol and on the ongoing use behavior of the consumers. Oxytrol is a thin, flexible, clear patch that is indicated for the treatment of overactive bladder a disease characterized by a collection of symptoms, including urinary frequency, urgency, and urge incontinence. The adhesive patch is placed on the skin to deliver Oxytrol through the skin into the bloodstream.

02

Conditions studied

  • Overactive Bladder
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In context

Urinary Bladder, Overactive

855 studies on the registry are indexed under Urinary Bladder, Overactive; 125 are open to participants now.

This study's enrollment of 855 is above the median of 72 across 652 interventional studies indexed under Urinary Bladder, Overactive.

Browse Urinary Bladder, Overactive studies →

Lead sponsor

Bayer is the lead sponsor of 1,643 studies on the registry; 57 are open to participants now.

Of its 209 completed or terminated interventional studies of FDA-regulated products, 129 (62%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Female
  • 18 years of age or older
  • Not pregnant or suspected to be pregnant
  • Never trained or employed as a healthcare professional
  • Neither the subject nor anyone in their household worked for a pharmaceutical company, a pharmacy, a managed care or health insurance company, a healthcare practice, or as a healthcare professional
  • Had not participated in any market research study, product label study or clinical trial in the past 12 months

Exclusion criteria

Exclusion criteria:

  • Symptoms of blood in the urine not related to menses
  • Back pain and fever in conjunction with frequency or urgency and any of the following: dysuria, hematuria, or cloudy urine
  • Narrow-angle glaucoma
  • Pregnant (as determined by a urine pregnancy test among women of child bearing potential)
  • Breastfeeding
  • Known allergy to oxybutynin
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
855 participants (actual)

Study arms

  • Experimental
    Oxytrol

    Subjects decided to purchase Oxytrol.

    Drug: Oxybutynin (Oxytrol, BAY839380)

Interventions

  • DrugOxybutynin (Oxytrol, BAY839380)

    Oxybutynin transdermal patch, 3.9 mg daily (Oxytrol Transdermal System)

06

What researchers measure

Primary outcomes

  1. The Percentage of Participants Who Did Not Stop Use When They Either Developed a New Symptom Referred to Anywhere in the Labeling or When Their Condition Worsened Including Abdominal and/or Pelvic Pain.

    For each participant who was defined as a primary endpoint misuser (i.e., subjects who did not stop using Oxytrol when they either developed a new symptom referred to anywhere in the labeling, with the addition of abdominal and/or pelvic pain, or when their OAB condition worsened) the full case report form was reviewed in order to determine if there were factors that would mitigate the incorrect decision to continue use. For example, if the subject had consulted a physician and was told to continue use, such continuation is acceptable. This process is termed "mitigation," because it involves determining if there are mitigating factors in the decision to continue use without posing any significant medical risk. Mitigation was conducted independently post-hoc by an external panel of advisors including two urologists and an urogynecologist and one physician employed by the sponsor.

    Time frame: Approximately 15 weeks from subjects' initial purchase of Oxytrol

Secondary outcomes

  1. The Percentage of Verified Users Who Did Not Stop Use When Their Condition Worsened or They Developed a New Symptom Referred to in the Labeling.

    This outcome measure did not include participants who developed abdominal and/or pelvic pain and was more reflective of how consumers stopped use according to the symptoms described on the Oxytrol labeling used in the study.

    Time frame: Approximately 15 weeks from subjects' initial purchase of Oxytrol

  2. The Median Time Taken to Discontinue Oxytrol Use by Verified Users Who Did Not Experience Improvement in Their Symptoms After Two Weeks of Treatment.

    This outcome measure evaluated the number of days it took for a subject to discontinue use of Oxytrol after their symptoms worsened or had stayed the same after 2 weeks of treatment. This was calculated using diary card data.

    Time frame: Approximately 15 weeks from subjects' initial purchase of Oxytrol

  3. The Percentage of Verified Users Who Did Not Stop Oxytrol Use Within Two Weeks After Experiencing no Improvement in Their Symptoms.

    Factors considered in this mitigation included providing: a response to one or more open ended questions that indicated a thoughtful, informed reason for continuing use; the subject talked to a physician, and the physician advised the subject that it was acceptable to continue using product; the subject had improved by Week 7 and indicated a thoughtful, informed reason for continuing use; as well as other reasons explained in the guidelines. This outcome measure was analyzed based on pre- and post-mitigation assessments but the post-mitigation analysis includes all subject data and is a better reflection of the subject's overall behavior. This was calculated by dividing the total number of subjects by the number of subjects who used the Oxytrol patch at least once.

    Time frame: Approximately 15 weeks from subjects' initial purchase of Oxytrol

  4. Number of Participants With Medical Risk Associated With the Development of New Symptoms or When Symptoms Did Not Improve for Patients That Continued Oxytrol Treatment.

    The medical risk of the newly developed symptom(s) or no sign of symptom improvement was categorized according to prospectively defined medical risk categories of 'medical risk', 'possible medical risk', and minimal/insignificant medical risk'. Mitigated data was not included in this endpoint.

    Time frame: Approximately 15 weeks from subjects' initial purchase of Oxytrol

  5. The Percentage of Verified Users Who Misused the Patch (Incorrect Duration of Use or Simultaneous Use).

    Factors considered in this mitigation for incorrect duration included most of the duration of patch use being correct, subject indicated understanding of the label but perhaps forgetting for a patch or two, etc. Factors considered in mitigation for simultaneous use include obvious diary errors, a subject stating that she did not do this, or a subject's doctor telling her to wear two patches at a time.

    Time frame: Approximately 15 weeks from subjects' initial purchase of Oxytrol

07

Results

Posted Oct 20, 2020

Participant flow

Study was conducted in US-sites and pharmacies from 25May2010 (first patient first visit) to 22Jun2011 (last patient last visit).

Participant flow — Overall Study
MilestoneOxybutynin (Oxytrol, BAY839380)
Started855
Treated727
Completed703
Not completed152
Withdrew: Not completed end-of-study interview24
Withdrew: Non-users70
Withdrew: Non-verifiable users58

Outcome measures

PrimaryThe Percentage of Participants Who Did Not Stop Use When They Either Developed a New Symptom Referred to Anywhere in the Labeling or When Their Condition Worsened Including Abdominal and/or Pelvic Pain.

For each participant who was defined as a primary endpoint misuser (i.e., subjects who did not stop using Oxytrol when they either developed a new symptom referred to anywhere in the labeling, with the addition of abdominal and/or pelvic pain, or when their OAB condition worsened) the full case report form was reviewed in order to determine if there were factors that would mitigate the incorrect decision to continue use. For example, if the subject had consulted a physician and was told to continue use, such continuation is acceptable. This process is termed "mitigation," because it involves determining if there are mitigating factors in the decision to continue use without posing any significant medical risk. Mitigation was conducted independently post-hoc by an external panel of advisors including two urologists and an urogynecologist and one physician employed by the sponsor.

Time frame:
Approximately 15 weeks from subjects' initial purchase of Oxytrol
Reported as:
Number · Percentage of participants
The Percentage of Participants Who Did Not Stop Use When They Either Developed a New Symptom Referred to Anywhere in the Labeling or When Their Condition Worsened Including Abdominal and/or Pelvic Pain.
Percentage of participantsOxybutynin (Oxytrol, BAY839380)
Pre-mitigation14.4 (12.0 to 17.2)
Post-mitigation3.4 (2.2 to 5.0)
SecondaryThe Percentage of Verified Users Who Did Not Stop Use When Their Condition Worsened or They Developed a New Symptom Referred to in the Labeling.

This outcome measure did not include participants who developed abdominal and/or pelvic pain and was more reflective of how consumers stopped use according to the symptoms described on the Oxytrol labeling used in the study.

Time frame:
Approximately 15 weeks from subjects' initial purchase of Oxytrol
Reported as:
Number · Percentage of participants
The Percentage of Verified Users Who Did Not Stop Use When Their Condition Worsened or They Developed a New Symptom Referred to in the Labeling.
Percentage of participantsOxybutynin (Oxytrol, BAY839380)
Pre-Mitigation13.1 (10.7 to 15.7)
Post-Mitigation3.2 (2.0 to 4.7)
SecondaryThe Median Time Taken to Discontinue Oxytrol Use by Verified Users Who Did Not Experience Improvement in Their Symptoms After Two Weeks of Treatment.

This outcome measure evaluated the number of days it took for a subject to discontinue use of Oxytrol after their symptoms worsened or had stayed the same after 2 weeks of treatment. This was calculated using diary card data.

Time frame:
Approximately 15 weeks from subjects' initial purchase of Oxytrol
Reported as:
Median · Days
The Median Time Taken to Discontinue Oxytrol Use by Verified Users Who Did Not Experience Improvement in Their Symptoms After Two Weeks of Treatment.
DaysOxybutynin (Oxytrol, BAY839380)
The Median Time Taken to Discontinue Oxytrol Use by Verified Users Who Did Not Experience Improvement in Their Symptoms After Two Weeks of Treatment.35 (26 to 46)
SecondaryThe Percentage of Verified Users Who Did Not Stop Oxytrol Use Within Two Weeks After Experiencing no Improvement in Their Symptoms.

Factors considered in this mitigation included providing: a response to one or more open ended questions that indicated a thoughtful, informed reason for continuing use; the subject talked to a physician, and the physician advised the subject that it was acceptable to continue using product; the subject had improved by Week 7 and indicated a thoughtful, informed reason for continuing use; as well as other reasons explained in the guidelines. This outcome measure was analyzed based on pre- and post-mitigation assessments but the post-mitigation analysis includes all subject data and is a better reflection of the subject's overall behavior. This was calculated by dividing the total number of subjects by the number of subjects who used the Oxytrol patch at least once.

Time frame:
Approximately 15 weeks from subjects' initial purchase of Oxytrol
Reported as:
Number · Percentage of participants
The Percentage of Verified Users Who Did Not Stop Oxytrol Use Within Two Weeks After Experiencing no Improvement in Their Symptoms.
Percentage of participantsOxybutynin (Oxytrol, BAY839380)
All Subjects Pre-Mitigation22.6 (19.4 to 26.0)
All Subjects Post-Mitigation11.0 (8.7 to 13.7)
SecondaryNumber of Participants With Medical Risk Associated With the Development of New Symptoms or When Symptoms Did Not Improve for Patients That Continued Oxytrol Treatment.

The medical risk of the newly developed symptom(s) or no sign of symptom improvement was categorized according to prospectively defined medical risk categories of 'medical risk', 'possible medical risk', and minimal/insignificant medical risk'. Mitigated data was not included in this endpoint.

Time frame:
Approximately 15 weeks from subjects' initial purchase of Oxytrol
Reported as:
Count of participants · Participants
Number of Participants With Medical Risk Associated With the Development of New Symptoms or When Symptoms Did Not Improve for Patients That Continued Oxytrol Treatment.
ParticipantsOxybutynin (Oxytrol, BAY839380)
Medical risk (subjects)16
Possible medical risk (subjects)24
Minimal/insignificant medical risk (subjects)284
SecondaryThe Percentage of Verified Users Who Misused the Patch (Incorrect Duration of Use or Simultaneous Use).

Factors considered in this mitigation for incorrect duration included most of the duration of patch use being correct, subject indicated understanding of the label but perhaps forgetting for a patch or two, etc. Factors considered in mitigation for simultaneous use include obvious diary errors, a subject stating that she did not do this, or a subject's doctor telling her to wear two patches at a time.

Time frame:
Approximately 15 weeks from subjects' initial purchase of Oxytrol
Reported as:
Number · Percentage of participants
The Percentage of Verified Users Who Misused the Patch (Incorrect Duration of Use or Simultaneous Use).
Percentage of participantsOxybutynin (Oxytrol, BAY839380)
Total Subjects Pre-Mitigation51.7 (47.9 to 55.4)
Total Subjects Post-Mitigation21.2 (18.3 to 24.4)

Adverse events

Collected over 15 weeks. Non-serious events are listed at a 0.3% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Oxybutynin (Oxytrol, BAY839380)—35/785 (4.5%)509/785 (64.8%)
Most frequent serious events
Showing 10 of 36
Most frequent serious events
EventOxybutynin (Oxytrol, BAY839380)
Urinary tract infectionInfections and infestations3/785
Chest painGeneral disorders2/785
CholecystitisHepatobiliary disorders2/785
ArrhythmiaCardiac disorders1/785
Cardiac disorderCardiac disorders1/785
Diarrhoea haemorrhagicGastrointestinal disorders1/785
Hepatic failureHepatobiliary disorders1/785
HypersensitivityImmune system disorders1/785
BronchitisInfections and infestations1/785
CellulitisInfections and infestations1/785
Most frequent other events
Showing 10 of 103
Most frequent other events
EventOxybutynin (Oxytrol, BAY839380)
Application site irritationGeneral disorders142/785
Urinary tract infectionInfections and infestations47/785
NasopharyngitisInfections and infestations46/785
Dry mouthGastrointestinal disorders32/785
Urge incontinenceRenal and urinary disorders24/785
SinusitisInfections and infestations21/785
ConstipationGastrointestinal disorders20/785
HeadacheNervous system disorders20/785
InfluenzaInfections and infestations18/785
Back painMusculoskeletal and connective tissue disorders17/785

Baseline characteristics

Age, Continuous
Age, Continuous(Years)Oxybutynin (Oxytrol, BAY839380)
Mean58.4 ± 15.0
Sex: Female, Male
Sex: Female, Male(Participants)Oxybutynin (Oxytrol, BAY839380)
Female727
Male0
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)Oxybutynin (Oxytrol, BAY839380)
White561
Black or African American66
Hispanic or Latino64
Asian12
Other24
08

Study locations

1 site
  • Stevenson Family Pharmacy
    Saint Joseph, Missouri 64504, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 20, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04534491
Lead sponsor
Bayer
Responsible party
Sponsor
First posted
Sep 1, 2020
Start date
May 25, 2010
Primary completion
Jun 22, 2011
Completion
Jun 22, 2011
Results posted
Oct 20, 2020
Last update
Oct 20, 2020

Study contacts

Bayer Study Director
study director · Bayer

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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