A 2-year prospective follow-up study of lower urinary tract symptoms in patients treated with clozapine

The association of lower urinary tract symptoms with schizophrenia and its treatments: A narrative review

BACKGROUND

A higher incidence of lower urinary tract symptoms (LUTS) in people with schizophrenia compared to the general population is often suggested. However, it is not clear whether this is a genuine association, and whether it is a direct result of schizophrenia itself, or a side-effect of certain antipsychotics.

METHODS

We undertook a narrative review evaluating how the published literature reports the relationship between LUTS and schizophrenia and its treatments. We searched Embase, Ovid Emcare, and Ovid MEDLINE(R) ALL to August 2022, limited to the English language. We selected the following search terms: schizophrenia, schizophrenic, LUTS, overactive bladder, urinary urgency, urinary incontinence, overactive bladder, enuresis, nocturnal enuresis, and voiding dysregulation. We identified seven domains for assessment in advance of commencing the review. These were the categorization, description, and treatment status of schizophrenia; evaluation of LUTS; categorization of LUTS confounders; recapturing of the disease states of both schizophrenia and LUTS after therapies; assessment of the association between LUTS and schizophrenia and/or antipsychotics.

RESULTS

The association between LUTS and schizophrenia was poorly described. The evidence was low quality and focused predominantly on urinary incontinence as an antipsychotic side effect, neglecting other LUTS. The status of schizophrenia was often incompletely characterized, and no papers made use of a bladder diary or LUTS-specific questionnaires to assess symptoms. No papers collected information about LUTS in patients not on antipsychotics, nor did any thoroughly evaluate the influence of confounding variables. Despite the tendency of symptoms and severity of both conditions to fluctuate over time, no studies fully assessed the status of both schizophrenia and LUTS at baseline, therapy initiation, and follow-up.

CONCLUSIONS

It is not possible to state whether there is an association between LUTS and schizophrenia or its treatments. This review highlights the need to improve research and clinical management of the urinary tract in schizophrenia, with meticulously designed longitudinal studies.

An association between incontinence and antipsychotic drugs: A systematic review

To date, due to the increasing prevalence of psychiatric diseases, the use of antipsychotic drugs has expanded. One of the proven side effects of these drugs is incontinence. Treatment of this complication improves the quality of life in these patients, increases self-confidence, and betters cope with their psychiatric illness. The exact mechanism of this side effect is not fully understood, but various methods have been used experimentally to deal with it. Strategies such as behavior therapy, discontinuation or change of drugs, reducing the dose of drugs, and adding drugs with less incontinence have been used. Each of these methods and studies has different results that need to be summarized to make optimal use of them. Since most of these reports are case reports with a low statistical population, our study has systematically reviewed these studies to find a comprehensive model to deal with this complication.

Nocturnal Enuresis is an Under-recognised Side Effect of Clozapine: Results of a Systematic Review

Objectives

Clozapine is an effective antipsychotic medication licenced for the management of treatment resistant schizophrenia. Due to its non-selective pharmacology, it has a broad range of side effects. Nocturnal enuresis secondary to the use of clozapine has been documented in the literature but may be overlooked, the link between drug and symptom being clinically unnoticed. Patients may not mention urinary symptoms due to supervening psychosis, co-existing symptomatology, embarrassment or shame. By raising awareness of the phenomenon, early recognition and patient support may improve compliance with clozapine medication, and consecutively, overall mental health. Consequently, this systematic review investigates the prevalence of nocturnal enuresis secondary to clozapine use.

Methods

A literature search on clozapine and nocturnal enuresis was used to identify the relevant papers. Papers providing the prevalence data on Clozapine associated nocturnal enuresis were selected for data extraction.

Results

47 papers were initially identified. Eight papers focused on the prevalence of clozapine associated nocturnal enuresis (CANE). Point prevalence (nocturnal enuresis at the time of assessment), 1-month prevalence and episode prevalence (nocturnal enuresis since beginning of clozapine) were given. Papers included patients with schizophrenia, schizoaffective disorder, bipolar affective disorder and psychotic depression, taking clozapine medication. The prevalence of CANE ranged from 10–42%. Point prevalence was 21–27%, 1-month prevalence was 10–39% and episode prevalence was 15–42%. Clozapine was more likely to cause nocturnal enuresis compared to other psychotropic medication.

Conclusion

The prevalence of CANE may be greater than previously thought. However, in order to determine an accurate prevalence of clozapine associated nocturnal enuresis, larger studies with strict inclusion criteria, common definition of diagnosis and prevalence are required. By establishing an accurate prevalence, physician awareness can be improved, and patients can becounselled on the risk of developing the side effect, thus improving early identification and reducing discontinuation rates.

Making clozapine safer: current perspectives on improving its tolerability

ABSTRACT: 

Clozapine is the gold standard treatment for refractory schizophrenia and its benefits are supported by an evidence base. Yet, it remains largely underused in clinical practice. This is because of low acceptability from patients and reluctance in initiating, and delays in prescribing by clinicians. A major deterrent is often the common adverse reactions, which clinicians are apt to disregard, focusing instead on the severe but rare complications of clozapine, such as agranulocytosis. We will review recent evidence on increasing the prescription of clozapine, focusing particularly on improving the safety and tolerability of the drug, by effective management of its adverse effects. The adverse effects considered in our review include sedation, seizures, myoclonus, hypersalivation, nausea, constipation, hypotension, hypertension, tachycardia, myocarditis, cardiomyopathy, weight gain, diabetes, dyslipidemia, neutropenia, agranulocytosis, fever, nocturnal enuresis and obsessive–compulsive symptoms. We will also discuss strategies to enable successful clozapine rechallenge after severe cardiac and hematological adverse reactions, thus aiming to offer patients their best chance at recovery.

Second generation antipsychotics & nocturnal enuresis in children

Nocturnal enuresis, or involuntary wetting during sleep, is an adverse drug reaction that may occur with numerous second generation antipsychotics (SGAs) and currently is underreported. This article reviews SGA-induced enuresis and its management.

Are commonly used psychoactive medications associated with lower urinary tract symptoms?

PURPOSE

Lower urinary tract symptoms (LUTS) such as urinary frequency and urgency are bothersome and associated with reduced quality of life. Atypical antipsychotics (AAPs) have been implicated in increasing the risk of urinary incontinence. In a large community-based sample of men and women, we examined the associations of AAP and selective serotonin reuptake inhibitor (SSRIs) use with LUTS.

METHODS

Data were collected (2002-2005) from a generalizable sample of Boston, MA, USA, residents aged 30-79 (N = 5503). LUTS were assessed using the American Urologic Association Symptom Index (AUA-SI). The prevalence of clinically-significant LUTS was estimated using a cutoff AUA-SI score of 8+ to indicate moderate-to-severe symptoms. Confounder-adjusted odds ratios (ORs) and 95% confidence intervals (CI) were calculated from multivariate logistic regression to estimate the associations for psychoactive drugs used in the previous month (SSRIs, AAPs, both) and LUTS.

RESULTS

Among women, AAP users had a higher prevalence of LUTS (46.2%) compared with SSRI users (23.5%) and those with depressive symptoms not using SSRIs or AAPs (26.3%). Corresponding prevalence estimates among men were 32.7%, 29.8%, and 33.3%. In multivariate models, AAP use was significantly associated with LUTS among women when used either with (OR = 2.72, 95% CI:1.45-5.10) or without (OR = 3.05, 95% CI:1.30-7.16) SSRIs, but SSRI use without AAP use was not associated with LUTS compared with nonusers without depressive symptoms. No associations were observed among men.

CONCLUSIONS

In our study, AAPs but not SSRIs were associated with increased prevalence of LUTS among women only. Further prospective research is needed to determine time sequence and cause and effect.