An Open Label Study to Evaluate the Effects of Ezogabine/Retigabine Added to Existing Anti-epileptic Drug(s) on Urinary Voiding Function in Subjects With Partial Onset Seizures
Public ClinicalTrials.gov record NCT01607346. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This is a multicentre, open label study to examine the effect of ezogabine/retigabine on the voiding function of adult subjects with drug-resistant partial onset seizures (POS). Subjects fulfilling the study entry criteria at Screening and at Baseline including a comprehensive eye examination by an ophthalmologist or retina specialist and a skin assessment by the investigator will receive ezogabine/retigabine. The starting dose of ezogabine/retigabine will be 300 mg/day. Subjects will be up titrated by 150 mg/day weekly up to the maximum ezogabine/retigabine daily dose of 1200 mg (or the highest tolerated dose). During the 49 days of the treatment phase, subjects will undergo three repeat non-invasive assessments of voiding function. In addition, subjects who meet pre-determined criteria for voiding dysfunction will undergo multichannel cystometry in order to characterise bladder hypocontractility, bladder outlet obstruction or a combination of events which clinically is manifest with difficulty emptying the bladder or acute urinary retention. At the end of the Treatment Phase, all subjects will enter the Taper Phase, a 3-week down titration period. Subjects who have new findings of abnormal pigmentation of the retina, unexplained vision loss, pigmentation of non-retinal ocular tissue or discoloration of skin, lip, nail, or mucosa since baseline will be asked to enter the Safety Follow-Up / Continuation Phase. All subjects will undergo 6-monthly comprehensive eye examinations during the Safety Follow-Up / Continuation Phase. Subjects who have not developed abnormal discoloration of the skin, lips, nails or mucosa will continue to undergo skin assessments by the investigator. Any subject who has developed abnormal discoloration of the skin, lips, nails or mucosa since baseline will be referred to a dermatologist for evaluation and 6-monthly follow up assessments. All subjects will continue to be followed until the pigmentation and/or discoloration has resolved or stabilised, as defined by no change over 2 consecutive 6-monthly assessments conducted over at least 12 months after discontinuation of ezogabine/retigabine.
Study identification
- NCT ID
- NCT01607346
- Recruitment status
- Terminated
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 10 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Mar 26, 2013
- Primary completion
- Nov 15, 2016
- Completion
- Nov 15, 2016
- Last update posted
- Dec 3, 2020
2013 – 2016
United States locations
- U.S. sites
- 4
- U.S. states
- 4
- U.S. cities
- 4
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| GSK Investigational Site | Bethesda | Maryland | 20817 | — |
| GSK Investigational Site | Columbus | Ohio | 43210 | — |
| GSK Investigational Site | Dallas | Texas | 75251 | — |
| GSK Investigational Site | Madison | Wisconsin | 53715 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 3 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01607346, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Dec 3, 2020 · Synced Sep 5, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01607346 live on ClinicalTrials.gov.