Fecal Incontinence Clinical Trial
Official title:
Antimuscarinic Medication for Urgency Urinary Incontinence in Women With Dual Incontinence (Darifenacin for Treatment of Women With Dual Incontinence)
This observational research study will examine whether a medication known as darifenacin (Enablex ®) used for urgency urinary incontinence (UUI) also helps to improve fecal incontinence symptoms. Darifenacin is FDA approved for UUI, but is not FDA approved for fecal incontinence or specifically for dual incontinence (treatment of urinary incontinence and fecal incontinence at the same time). If participants are eligible for this study, they will have had symptoms of bothersome urgency urinary incontinence and fecal incontinence, and have decided to try medication for urgency urinary incontinence. Darifenacin (Enablex ®) is an oral medication which relaxes the bladder muscle to help prevent urgency urinary leakage. It is commonly used to treat overactive bladder and urgency urinary leakage. There is some evidence that this medication may also help with fecal incontinence by slowing the gut and preventing loose stools. Investigators are planning to enroll approximately 30 patients who have both UUI and fecal incontinence and who choose medical treatment as a part of their standard care.
Urgency urinary incontinence (UUI) and fecal incontinence (FI) are two highly prevalent
pelvic floor disorders which negatively impact quality of life (QOL). Among women with
urgency urinary incontinence (UUI), 8-20% also suffer from FI.
Initial management of both UUI and FI consists of behavioral therapies with or without
pharmacologic management. First line management of FI includes diet, fluid and fiber intake
adjustments (Grade A), antidiarrheal medication (Grade B) and exercises to strengthen and
enhance awareness of the anal sphincter (Grade C). If symptoms fail to improve with these
measures by 8-12 weeks, further investigations should be considered before moving to more
invasive management options such as bulking agents, sphincterplasty or sacral nerve
stimulation.
In addition to fiber and antidiarrheals, medications with antimuscarinic effects such as
hyoscyamine and tricyclic antidepressants are often used in the treatment of FI and IBS-D.
Antimuscarinic medications function in this setting by blockade of colonic muscarinic
acetylcholine receptors causing smooth muscle relaxation, decreased gut motility and
prolonged colon transit time.
In patients with overactive bladder (OAB) with UUI, anti-muscarinic medications or a
β3-adrenoreceptor agonist medication can be added to behavioral therapy as first line to
optimize symptom control and QOL (Gormley 2015). In patients being treated for UUI,
constipation is often viewed as an unwanted side effect of antimuscarinic medications, with
varying constipation rates observed among the different medications. Non-selective
antimuscarinic medications such as fesoterodine (Toviaz ®) and tolterodine (Detrol ®) may be
less likely to cause constipation, whereas newer M2 or M3-selective agents such as
darifenacin (Enablex ®), solifencin (Vesicare®) or trospium (Sanctura ®) may be more
constipating. Darifenacin is notable for the highest constipation rates- up to 15% for the
7.5mg dose, and up to 21% for the 15mg dose.
While there is no current evidence for one specific antimuscarinic medication use in patients
suffering with dual incontinence (specifically UUI and FI), many providers use the more
constipating antimuscarinic medications as treatment in this setting. Patients with
loose-stool-predominant FI may benefit from the constipating side effects by slowed colonic
transit time, firmer bowel movements and thereby improved bowel-related QOL. Only one study
has previously examined the effect of antimuscarinic medication for OAB on bowel-related QOL.
In this descriptive study, 90 patients who were treated with antimuscarinic medication for
OAB were followed to measure change in ePAQ (electronic Personal Assessment Questionnaire)
score. Investigators reported significant improvement in bowel-related QOL three to six
months after treatment. Authors did not specify pre-treatment diagnoses, symptoms or details
of the antimuscarinic treatment.
While anecdotally antimuscarinic medications are an effective first line medication in
patients with dual incontinence, more evidence is needed. The goal of our study therefore, is
to observe the effect of standard of care antimuscarinic therapy for UUI on fecal
incontinence symptoms in women with dual incontinence. Investigators will compare patient
reported fecal incontinence symptoms before and after treatment in women with dual
incontinence who elect to undergo standard of care medical management for UUI with the
antimuscarinic medication darifenacin.
Hypothesis: In patients with dual incontinence, treatment of urgency urinary incontinence
with darifenacin 7.5mg will improve FI symptom severity at 8 weeks Primary Aim: To
characterize change in FI symptom severity (change in Vaizey score) after darifenacin
treatment in patients with dual incontinence at 8 weeks
Secondary Aims:
Secondary Aim #1: To characterize post-treatment change in FI frequency using 7-day bowel
diaries, change in quality of life (change in Fecal Incontinence Quality of Life (FIQOL)
total and subscale scores), and characterize treatment improvement using the Patient Global
Impression of Improvement (PGI-I) measure Secondary Aim #2: To describe compliance and
adverse effects of antimuscarinic medication in patients with dual incontinence.
Secondary Aim #3: To describe effect of antimuscarinic medication on OAB symptom bother and
quality of life in patients with dual incontinence, using the OAB questionnaire short form
(OAB-q SF)
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