Overactive bladder patients and role of the pharmacist

Adverse Events for Overactive Bladder Medications From a Public Federal Database

IMPORTANCE

Clinical data on the use of overactive bladder (OAB) medications are limited by the physician interpretation of adverse effects rather than those that are patient reported.

OBJECTIVE

The aim of the study was to evaluate the association between OAB medications and adverse drug events (ADEs) through the self-reporting U.S. Food and Drug Administration Adverse Event Report System database.

STUDY DESIGN

The U.S. Food and Drug Administration Adverse Event Report System (FAERS) database was queried from 2004 to 2019. Adverse drug events were recategorized. Disproportionality analysis was used to detect the risk signals for each OAB medication and ADEs. χ 2 values were calculated to assess the association between ADEs and dosage.

RESULTS

A total number of 14,102 reports were identified. The most frequently reported OAB medications were mirabegron (35%), transdermal oxybutynin (27%), and solifenacin (25%). Neuropsychiatric (NP) ADEs were highest with tolterodine and fesoterodine usage (16% and 15.6%, respectively) and transdermal oxybutynin had the lowest (6.5%). Increasing the dose of tolterodine or fesoterodine was not associated with increased NP ADEs. Oxybutynin had the highest risk of affect/mood disorder, agitation, and balance/movement disorder; however, it had the lowest risk of headache/migraine compared with all OAB medications. Mirabegron compared with all other OAB medications had the lowest risk of affect/mood disorder and agitation; however, it had the highest risk of headache and migraines.

CONCLUSIONS

The FAERS database not only is a repository of ADEs but also may represent evolving prescribing habits for OAB medications. Transdermal oxybutynin had the lowest NP ADEs and may be appropriate for selected individuals.

The effect of mirabegron on patient-related outcomes in patients with overactive bladder: the results of post hoc correlation and responder analyses using pooled data from three randomized Phase III trials

PURPOSE

To understand how improvements in the symptoms of overactive bladder (OAB) seen with the β3-adrenoceptor agonist mirabegron 50 mg, correlate with patient experience as measured by validated and standard patient-reported outcomes (PROs), and to identify whether there is overall directional consistency in the responsiveness of PROs to treatment effect.

METHODS

In a post hoc analysis of pooled data from three randomized, double-blind, placebo-controlled, 12-week Phase III trials of mirabegron 50 mg once daily, responder rates for incontinence frequency (≥50 % reduction in incontinence episodes/24 h from baseline to final visit), micturition frequency (≤8 micturitions/24 h at final visit), and PROs [minimally important differences in patient perception of bladder condition (PPBC) and subsets of the overactive bladder questionnaire (OAB-q) measuring total health-related quality of life (HRQoL), and symptom bother] were evaluated individually and in combination.

RESULTS

Mirabegron 50 mg demonstrated greater improvement from baseline to final visit than placebo for each of the responder analyses, whether for individual objective and subjective outcomes or combinations thereof. These improvements versus placebo were statistically significant for all double and triple responder analyses and for all single responder analyses except PPBC. PRO measurements showed directional consistency and significant correlations, and there were also significant correlations between objective and subjective measures of efficacy.

CONCLUSIONS

The improvements in objective measures seen with mirabegron 50 mg translate into a meaningful clinical benefit as evident by the directional consistency seen in HRQoL measures of benefit.

Synergistic effect of iontophoresis and chemical enhancers on transdermal permeation of tolterodine tartrate for the treatment of overactive bladder

PURPOSE

The objective of the study was to evaluate the synergistic transdermal permeation effect of chemical enhancers and iontophoresis technique on tolterodine tartrate (TT) transdermal gel and to evaluate its pharmacokinetic properties.

MATERIALS AND METHODS

Taguchi robust design was used for optimization of formulations. Skin permeation rates were evaluated using the Keshary-chein type diffusion cells in order to optimize the gel formulation. In-vivo studies of the optimized formulation were performed in a rabbit model and histopathology studies of optimized formulation were performed on rats.

RESULTS

Transdermal gels were formulated successfully using Taguchi robust design method. The type of penetration enhancer, concentration of penetration enhancer, current density and pulse on/off ratio were chosen as independent variables. Type of penetration enhancer was found to be the significant factor for all the responses. Permeation parameters were evaluated when maximum cumulative amount permeated in 24 hours (Q24) was 145.71 ± 2.00µg/cm² by CIT4 formulation over control (91.89 ± 2.30µg/cm²). Permeation was enhanced by 1.75 fold by CIT4 formulation. Formulation CIT4 containing nerolidol (5%) and iontophoretic variables applied (0.5mA/cm² and pulse on/off ratio 3:1) was optimized. In vivo studies with optimized formulation CIT4 showed increase in AUC and T1/2 when compared to oral suspension in rabbits. The histological studies showed changes in dermis indicating the effect of penetration enhancers and as iontophoresis was continued only for two cycles in periodic fashion so it did not cause any skin damage observed in the slides.

CONCLUSION

Results indicated that iontophoresis in combination with chemical enhancers is an effective method for transdermal administration of TT in the treatment of overactive bladder.

The emergence of new drugs for overactive bladder

Overactive bladder is a common and distressing problem. Standard therapy is directed towards modifying the detrusor motor sensitivity and response via anticholinergic medication. Currently available medications are reviewed and alternative targets for treatment are presented.

Outcomes associated with pharmacotherapy in overactive bladder

Overactive bladder is one of the most prevalent medical conditions in the USA. Prevalence rates of overactive bladder are higher in women and increase with advanced age. Although the disease is not associated with mortality, it has significant impact on health-related quality of life amongst patients. Pharmacologic, as well as behavioral treatment therapies, are available for overactive bladder treatment with pharmacologic agents being the mainstay therapy. The purpose of this review is to outline the recent developments in the treatment of overactive bladder. This is an extensive review that provides important information on the outcomes associated with different pharmacotherapeutic agents used in overactive bladder. It concludes with the authors' opinions and suggestions for the future research in this area.

Persistence and adherence of medications for chronic overactive bladder/urinary incontinence in the california medicaid program

OBJECTIVES

To investigate persistence and adherence of medication treatment in chronic overactive bladder/urinary incontinence (OAB/UI) patients, and to evaluate OAB/UI-related comorbidity events associated with persistence.

METHODS

Pharmaceutical outcomes research with a health-care provider perspective was conducted on a California Medicaid (Medi-Cal) chronic OAB/UI population. The primary end point was medication possession ratio (MPR), which was used to measure refill adherence. Secondary end points measuring persistence patterns included discontinuation of OAB drug therapy (medication-uncovered interval > 30 days) and time to discontinuation (period from the index date until the first discontinuation date). Significant factors on nonpersistence were found by using a Cox Proportional Hazards model. Factors contributing to nonadherence (MPR < 0.8) and the relationship between OAB/UI comorbidity events and persistence were examined by logistic regressions.

RESULTS

Of 2496 eligible patients, 36.9% had only one OAB/UI prescription. The mean MPR was 0.34 (SD 0.21) and the median was 0.3, indicating that on average only about one-third of period of time since medication initiation was covered by the therapy. Only 122 patients exhibited > 80% adherence during the 6-month follow-up-period. Significant predictors of higher persistence included: white ethnicity, previous hospitalization length, starting with tolterodine or oxybutynin extended-release, and previous use of topical drugs or antipsychotics. Nevertheless, previous depression or urinary tract infection (UTI) diagnosis, polypharmacy, significantly increased the odds of early discontinuation. Treatment discontinuation increased the risk of UTI diagnosis by 37% in the post-treatment period (P = 0.03; OR 1.37; 95% CI 1.03-1.84), but had no significant effect on other OAB/UI-related comorbidities.

CONCLUSIONS

For chronic OAB/UI patients identified in this study, both persistence and adherence with medication treatment were suboptimal. These results suggest that persistence and treatment discontinuation remains problematic for the OAB/UI population.

Overactive bladder: achieving a differential diagnosis from other lower urinary tract conditions

Overactive bladder (OAB) is a debilitating condition characterised by an urgent need to urinate (urgency), often with urinary frequency and, in some cases, urgency incontinence and nocturnal frequency. Patients often adopt complex adaptive behaviours to cope with their symptoms as OAB can compromise all dimensions of a patient's quality of life. Most OAB patients present initially to their primary care physician. Diagnosis is based on presenting symptomatology and does not require any invasive tests. Direct questioning about symptoms is important in achieving a differential diagnosis. The most common condition to be considered when working towards a differential diagnosis is a urinary tract infection (UTI). However, some physicians have expressed concerns about identifying the small number of cases where bladder cancer is a potential underlying aetiology for the symptoms of OAB. In this review, we examine the prevalence and patient profiles for these bladder conditions and their presenting symptomatology. We also review tests that may be recommended to exclude a diagnosis of UTI or bladder cancer and present a diagnostic algorithm suitable for office-based primary care practice.