Treatment of sialorrhea with glycopyrrolate: A double-blind, dose-ranging study

Sialorrhea: Working with people with disability for better outcomes

This commentary is on the original articles by Fayoux et al. and Orriëns et al. on pages 910–918 and 919–930

The Use of Ipratropium Bromide for the Treatment of Pediatric Sialorrhea: A Retrospective Clinical Case Series

OBJECTIVE

This retrospective review documents the experience of ipratropium bromide use among pediatric patients with sialorrhea at our multidisciplinary sialorrhea clinic at Children's Hospital at London Health Sciences Centre (LHSC).

METHODS

A retrospective chart review of patients diagnosed with sialorrhea at our multidisciplinary clinic between January 2015 and June 2021 was completed. Data on patient demographics, comorbidities, clinical presentation, previous interventions, quality of life, and medication adverse side effects was collected. Drooling Frequency and Severity Scale (DFSS) scores were reviewed to compare sialorrhea management pre- and post-treatment with topical 0.03% ipratropium bromide nasal solution. A descriptive analysis and Wilcoxon signed rank tests were conducted to compare pre- versus post-treatment DFSS scores.

RESULTS

A total of 12 patients presented for follow-up and were included in the final analysis. At the pre-treatment visit, the median DFSS score was 4 for frequency and 5 for severity. Post-treatment, median DFSS score was 3 for frequency and 4.5 for severity, (P = .020 and .129, respectively). Minimal adverse effects were encountered.

CONCLUSIONS

Ipratropium bromide provided a statistically significant benefit for drooling frequency in the patients studied and may present an additional topical medical option for pediatric sialorrhea with limited adverse effects.

The when, why, and how of using glycopyrronium to diminish drooling in children with neurodevelopmental disabilities: Implications for clinical practice

BACKGROUND

Despite the established efficacy of glycopyrronium bromide in reducing drooling among children with neurodevelopmental disabilities, evidence on its impact on the daily lives of children and parents and effectiveness in a real-world setting are scarce, especially among long-term users. This study explored timing and duration of glycopyrronium treatment, effect and impact on daily life, and occurrence of side effects to inform clinical practice.

METHODS

This was a retrospective cohort study at a national referral centre for drooling, including 61 children with nonprogressive neurodevelopmental disabilities, treated with glycopyrronium for anterior and/or posterior drooling between 2011 and 2021. Data were obtained from medical records and supplemented by structured telephone interviews with parents.

RESULTS

Anterior drooling severity decreased in 82% of the included children. Changes in the impact of drooling on burden of care, social interaction, and self-esteem were reported in 55%, 31%, and 36%, respectively. Side effects were noted for 71% of cases, yet only 36% of parents deemed these as outweighing the positive impact of treatment. A substantial majority (77%) of the included children were long-term users (≥6 months). Among these, 38% of parents reported decreasing effectiveness and 27% noticed more prominent side effects over time.

CONCLUSIONS

Glycopyrronium demonstrated potential in mitigating the impact of drooling on daily life, although variations were observed in the specific aspects and extent of improvement. The real-world context of our study provides important insights for refining clinical practices, emphasizing the need for balanced consideration of treatment benefits and potential side effects to facilitate shared decision-making.

Glycopyrrolate as an Adjunct in the Management of Anastomotic Leak Following Repair of Esophageal Atresia: A Clinicoradiological Perspective

Context

Anastomotic leak after primary repair of esophageal atresia (EA) with tracheoesophageal fistula (TEF) is a well-known complication and can represent a challenging clinical scenario.

Aims

The present study aimed to evaluate the role of glycopyrrolate as an adjunct in the treatment of anastomotic leak after primary repair of EA Vogt type 3b.

Settings and Design

A retrospective study was carried out in our tertiary care teaching institute from January 2015 to December 2022.

Materials and Methods

Neonates with EA with distal TEF with primary repair who had developed anastomotic leak, managed by the author(s), were studied. The study included patients with major, minor, and radiological leaks. Glycopyrrolate was administered in the dose of 4 μg/kg 8 hourly. The outcomes of the study were either resolution or progression of the leak.

Results

There were 21 patients who were managed with glycopyrrolate in addition to the classical treatment of the anastomotic leak following repair of EA with distal TEF. The male: female ratio was 1:1.1. All the cases had anastomotic leaks with either clinically detectable in the chest tube (15) or radiological leak (6). The leaks were detected early in patients with major leak (mean = 3.2 ± 0.84 days) compared to minor leak (mean =4.9 ± 1.29 days). Radiological leaks were detected in all the neonates on postoperative day 7. In five patients with major leak, there was a negligible reduction in the amount of chest tube output, and were subjected to diversion procedures. There were a total of three deaths out of five in this group. In 10 patients with minor leak, there was complete resolution of anastomotic leak in eight patients (80%); there was one patient each with mortality and diversion procedure. The patients with a radiological leak (6) did not show any deterioration, and they were fed 1-5 days after the esophagogram.

Conclusions

Glycopyrrolate may be an advantageous postoperative adjunct in the management of minor and radiological leak after tracheoesophageal repair.

Comparative Efficacy and Side Effect Profiles of Interventions for Pediatric Saliva Control: A Cohort Study

OBJECTIVE

To compare efficacy and side effect profile data on conservative, behavioral, pharmacological, and surgical treatments used for pediatric saliva control.

STUDY DESIGN

A cohort study of children (n = 483) referred to a specialty Saliva Control service between May 2014 and November 2019 was performed, using quantitative data from pretreatment and post-treatment questionnaires (the Drooling Impact Scale [DIS], Drooling Rating Scale [DRS]) and recording of side effects. Overall, 483 children were included; treatment choices were based on published international guidelines.

RESULTS

The greatest improvement was seen after intraglandular botulinum toxin A (BTX-A) injections (n = 207; 551 courses; mean DIS change, 34.7; 95% CI = 29.2-35.7) or duct transpositional surgery (n = 31; mean change in DIS, 29.0; 95% CI, 22.3-35.7). Oral anticholinergics were associated with good outcomes, with no significant statistical difference between glycopyrronium bromide (n = 150; mean DIS change, 21.5; 95% CI, 19.1-24.0) or trihexyphenidyl (n = 87; mean DIS change, 22.4; 95% CI, 18.9-25.8). Inhaled ipratropium bromide was not as efficacious (n = 80; mean DIS change, 11.1; 95% CI, 8.9-13.3). Oromotor programs were used in a selected group with reliable outcomes (n = 9; mean DIS change, 13.0). Side effects were consistent with previous studies. Overall, in cases of milder severity, enterally administered therapies provided a good first-line option. With more severe problems, BTX-A injections or saliva duct transpositional surgery were more effective and well tolerated.

CONCLUSIONS

We describe a large, single-center pediatric saliva control cohort, providing direct comparison of the efficacy and side effect profiles for all available interventions and inform clinical practice for specialists when considering different options. BTX-A injections or saliva duct transpositional surgery seem to be more effective for saliva control that is more severe.

Onabotulinum Toxin A (BoNT-A) for Drooling in Children: A Systematic Review and Meta-Analysis

INTRODUCTION

Sialorrhea, also known as drooling, hypersalivation, or ptyalism, has a significant impact on the medical and psychosocial well-being of children. Onabotulinum toxin A (BoNT-A) is the most commonly used botulinum toxin worldwide for the treatment of sialorrhea in children.

OBJECTIVES

To conduct a comprehensive systematic review and meta-analysis to assess the clinical efficacy and potential adverse effects of BoNT-A as a treatment for drooling in children.

METHODS

Cochrane, Embase, and Medline databases were systematically searched (up to May 2023). Out of 535 identified publications, 20 were found eligible for inclusion. A systematic review and meta-analysis were performed to determine the efficacy of BoNT-A treatment in children in reducing the frequency and severity of drooling.

RESULTS

Out of the 20 studies included, a meta-analysis was conducted on the complete dataset of eight studies involving 131 patients. BoNT-A was found to significantly decrease the severity of drooling in patients with sialorrhea (standardized mean difference [SMD], -2.07; 95% confidence interval [CI], -2.91 to -1.23; p < 0.0001) when compared with the conditions before injections using random-effects models. Six studies out of 20 reported dysphagia as an adverse effect after injection. Other side effects included thickness of saliva and pain at the site of injection.

CONCLUSION

BoNT-A is a clinically effective therapy that improves drooling severity in children with sialorrhea. Although there were some adverse side effects reported, they were transient and not severe. Future studies are needed to further evaluate the best techniques and to identify the ideal dosages required to achieve the optimal outcomes. Laryngoscope, 2024.

Botulinum neurotoxin type A in the interdisciplinary treatment of sialorrhea in adults and children-update and practice recommendations

Sialorrhea is defined as a chronic excessive flow of saliva from the mouth, often with adverse consequences for health and quality of life of patients. In addition to currently used non-drug treatment and systemic drugs, intraglandular Botulinum Neurotoxin A (BoNT/A) injections have been examined in case studies, controlled trials and clinical practice. Two pivotal Phase III trials recently led to market approval in the USA and EU for IncobotulinumtoxinA [Xeomin®, IncoBoNT/A, Clostridium botulinum neurotoxin type A (150 kD), free from complexing proteins, Merz Pharmaceuticals GmbH] for treatment of chronic sialorrhea in adults and pediatric patients. This review provides a multidisciplinary approach to discuss the current state of sialorrhea therapy as well as benefits and current limitations of BoNT/A injections. A consensus regarding treatment recommendations made available to physicians in Germany in 2022 has now been updated here for presentation to an international audience. This review provides a framework including a flow chart for patient selection, recommendations for dosing and the injection process, as well as a discussion of therapeutic goals, long-term benefits and safety aspects. This review is aimed at supporting physicians in developing multidisciplinary and individualized treatment approaches to achieve optimal benefits for patients.

Examining the Role of Sublingual Atropine for the Treatment of Sialorrhea in Patients with Neurodevelopmental Disabilities: A Retrospective Review

Sialorrhea is common in children with neurodevelopmental disabilities (NDD) and is reported in >40% of children with cerebral palsy (CP). It causes a range of complications, including significant respiratory morbidity. This single-center retrospective chart review aims to document sublingual atropine (SLA) utilization to guide further study in establishing its role in secretion management for children with NDD. A chart review was completed for patients with NDD ≤ 22 years of age treated with SLA at a free-standing children's hospital between 1 January 2016 and 1 June 2021. Descriptive statistics were generated to summarize findings. In total, 190 patients were identified, of which 178 met inclusion criteria. The average starting dose for SLA was 1.5 mg/day, or 0.09 mg/kg/day when adjusted for patient weight. Eighty-nine (50%) patients were prescribed SLA first line for secretion management while 85 (48%) patients tried glycopyrrolate prior to SLA. SLA was used after salivary Botox, ablation, and/or surgery in 16 (9%) patients. This study investigates SLA as a potential pharmacologic agent to treat sialorrhea in children with NDD. We identify a range of prescribing patterns regarding dosing, schedule, and place in therapy, highlighting the need for further evidence to support and guide its safe and efficacious use.

Botulinum Toxin for Drooling in Adults with Diseases of the Central Nervous System: A Meta-Analysis

(1) Background: The purpose of this study was to determine whether the drooling of adult patients with diverse central nervous system diseases can be treated with botulinum toxin type A. (2) Methods: The Cochrane Library, MEDLINE, and Embase were all searched for studies that fit the inclusion criteria. The patients in the studies had to be adults (>18 years old), and the studies had to be randomized placebo-controlled trials, controlled trials, or prospective studies. Each study had to have enough quantifiable data available for meta-analysis. The primary outcome measure was the Drooling Severity and Frequency Scale (DSFS). (3) Results: The meta-analysis comprised three studies. A statistically significant difference in DSFS score between the treatment and control groups was observed in the meta-analysis, with an overall standardized mean difference of -0.9377 (95% CI, -1.2919 to -0.5836; p < 0.0001). A total of seven studies were ineligible for inclusion in the meta-analysis and were only assessed as qualitative data. All qualitative studies showed a significant reduction in DSFS score a few weeks or months after the injection of botulinum toxin. (4) Conclusions: Botulinum toxin type A is safe and effective as a treatment for drooling in adult patients with central nervous system diseases.

Randomised, double-blind, placebo-controlled trial of glycopyrronium in children and adolescents with severe sialorrhoea and neurodisabilities: protocol of the SALIVA trial

INTRODUCTION

Severe sialorrhoea is a common, distressing problem in children/adolescents with neurodisabilities, which has adverse health and social consequences. The SALIVA trial is designed to evaluate the efficacy and safety of a paediatric-specific oral solution of glycopyrronium along with its impact on quality-of-life (QoL), which has been lacking from previous trials of sialorrhoea treatments.

METHODS AND ANALYSIS

A double-blind, placebo-controlled, randomised phase IV trial is ongoing in several centres across France. Eighty children aged 3-17 years with severe sialorrhoea (≥6 on the modified Teachers Drooling Scale) related to chronic neurological disorders in whom non-pharmacological standard of care has already been implemented or has failed, will be recruited. Patients will be randomised 1:1 to receive a 2 mg/5 mL solution of glycopyrronium bromide (Sialanar 320 µg/mL glycopyrronium) or placebo three times daily during a 3-month blinded period. After Day 84, participants will be invited into a 6-month, open-label study extension period, where they will all receive glycopyrronium. The primary endpoint of the double-blind period will be the change from baseline to Day 84 in the Drooling Impact Scale (DIS), a validated measure to assess sialorrhoea. A series of secondary efficacy endpoints involving change in total DIS, specific DIS items and response (DIS improvement ≥13.6 points) will be analysed in a prespecified hierarchy. QoL data will be collected from parents, caregivers and patients where possible using specific DIS questions and DISABKIDS questionnaires. Safety endpoints, including adverse events, will be assessed throughout the trial periods.

ETHICS AND DISSEMINATION

In total, 87 children have been recruited and recruitment is now complete. Final results are expected by the end of 2023. Findings will be presented at conferences and published in peer-reviewed journals.

TRIAL REGISTRATION NUMBER

EudraCT 2020-005534-15.

Salivary gland surgery and nonviral respiratory-related hospitalizations in children with neurodevelopmental impairment

OBJECTIVES

Neurodevelopmentally impaired (NI) children with chronic sialorrhea are at elevated risk for aspiration and respiratory tract infections. Direct resection or ligation ("DROOL") of the submandibular glands (SMG) with parotid duct ligation are surgical interventions intended to decrease salivary output. The objective of this study is to determine the impact of DROOL surgery on the incidence of nonviral respiratory-related (NVR) post-procedure hospital encounters including emergency department visits and admissions.

METHODS

Retrospective case series of NVR related outcomes after DROOL surgery in children performed at a single institution, tertiary referral center.

RESULTS

A total of 35 gastrostomy tube-dependent patients (60% male, average age 8.2 [SD 6.0] years) with NI underwent DROOL surgery (86% SMG excision). Pre- and post-surgical follow-up time was 3.6 and 3.2 years, respectively. Presurgical and postsurgical NVR hospital encounters occurred in 28 (80%) and 14 (40%) patients, respectively (p < 0.01). Mean (SD) postoperative NVR hospital encounters occurred less frequently when compared to presurgical period (0.4 [0.6] vs. 1.0 [1.2] per year, p < 0.01) with average change of -0.7 encounters per year (SD 1.4, 95% CI -1.0 to -0.2). Patients with encounters within a year preceding DROOL (OR 4.9, p = 0.04, 95% CI 1.1-22.8), or those with at least 3 preoperative encounters (OR 8.0, p = 0.01, 95% CI 1.6-40.3) were significantly associated with a postsurgical NVR event. Fewer patients used anti-sialorrhea medication postoperatively compared to preoperatively (60% vs. 17%, p < 0.01). No patient developed surgical site complications requiring operative interventions.

CONCLUSIONS

DROOL surgery for chronic sialorrhea in patients with NI was associated with decreased hospitalization and ED visits for NVR respiratory events post-procedurally. Sialorrhea may be an actionable source of recurrent respiratory illnesses requiring hospitalizations.

LEVEL OF EVIDENCE: 4

Safety Profile and Lack of Immunogenicity of IncobotulinumtoxinA in Pediatric Spasticity and Sialorrhea: A Pooled Analysis

IncobotulinumtoxinA, a pure botulinumtoxinA formulation, is free of accessory proteins. This analysis provides pooled safety data from phase 3 trials of children/adolescents (2–17 years), investigating incobotulinumtoxinA for the treatment of spasticity associated with cerebral palsy (at doses ≤20 U/kg (max. 500 U) per injection cycle (IC) for ≤6 ICs; three trials) or sialorrhea associated with neurologic disorders (at total doses of 20–75 U per IC for ≤4 ICs; one trial) for ≤96 weeks. Safety endpoints included the incidences of different types of treatment-emergent adverse events (TEAEs) and immunogenicity. IncobotulinumtoxinA dose groups were combined. Of 1159 patients (mean age 7.3 years, 60.4% males) treated with incobotulinumtoxinA, 3.9% experienced treatment-related TEAEs, with the most common being injection site reactions (1.3%) (both indications), muscular weakness (0.7%) (spasticity), and dysphagia (0.2%) (sialorrhea). Two patients (0.2%) experienced a treatment-related treatment-emergent serious adverse event, and 0.3% discontinued the study due to treatment-related TEAEs. No botulinumtoxinA-naïve patients developed neutralizing antibodies (NAbs) after incobotulinumtoxinA. All children/adolescents with known pre-treatment status and testing positive for Nabs at final visit (n = 7) were previously treated with a botulinumtoxinA other than incobotulinumtoxinA. IncobotulinumtoxinA was shown to be safe, with very few treatment-related TEAEs in a large, diverse cohort of children/adolescents with chronic conditions requiring long-term treatment and was without new NAb formation in treatment-naïve patients.

Comparative Efficacy of Botulinum Toxin in Salivary Glands vs. Oromotor Therapy in the Management of Sialorrhea in Cerebral Palsy Impact on Sleep Quality

Aims

The aim of this study was to compare the effects of intraglandular abobotuliniumtoxinA application and oromotor therapy in the management of sialorrhea in patients with cerebral palsy and its effect on sleep quality.

Methods

A comparative study (n = 134), mean age 7.1 years (± 3.9 years) was performed in pediatric patients, between the efficacy of abobotuliniumtoxinA in salivary glands and oromotor therapy (JT), with a control group receiving exclusive oromotor therapy (EOMT). Demographic variables, as well as Gross Motor Function Classification System (GMFCS), Drooling Severity and Frequency Scale (DSFS), Sleep Disturbance Scale for Children (SDSC) and Eating and Drinking Ability Classification System (EDACS) were analyzed in 134 patients considering two measurements 6 months apart. Statistical analysis was developed between both groups.

Results

The greatest improvement in safety and efficacy of swallowing were those in the JT group with initial levels of EDACS IV and V. Both therapies result in favorable changes of all subscales means of SDSC, with joint therapy showing the greater benefit (p = 0.003) over EOMT (p = 0.06), especially for Sleep Breathing Disorders and Disorders of initiating and maintaining sleep (p &lt; 0.01 vs. p = 0.07). No major adverse effects were found, only those expected from the application of the toxin, such as pain, mild, and transient local inflammation.

Interpretation

A correlation between frequency and intensity of sialorrhea, with the frequency of sleep disorders and dysphagia was found. Conventional EOMT proved to be useful, improving the safety and efficacy of swallowing, sialorrhea and sleep disorder, however it can be enhanced with the application of abobotuliniumtoxinA.

Anticholinergic treatment for sialorrhea in children: A systematic review

Background

Sialorrhea in children can be associated with adverse physical and social effects. Treatment using anticholinergic medications has been shown to offer symptomatic relief, but there is no consensus regarding which treatment is the most efficacious.

Objective

To examine the effectiveness of anticholinergic medications for sialorrhea in children.

Methods

A systematic review was carried out in Medline, EMBASE, Cochrane, Scopus, and the Web of Science from inception until April 29, 2020. Studies reporting original data on the efficacy of anticholinergic medications in the management of sialorrhea in children aged 0 to 17 years of age were included. This review adhered to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) standards. Data on study design, setting, population, pharmacologic intervention(s), comparator(s), outcomes, and results were extracted and summarized.

Results

The search strategy identified 2,800 studies of which 27 articles were included in the synthesis, including five randomized controlled trials. Each anticholinergic undergoing experimental study (glycopyrrolate, scopolamine/hyoscine, trihexyphenidyl/benzhexol, benztropine, and atropine) showed evidence of efficacy. Adverse side effects were common. Significant heterogeneity exists in the studies' methodology and the variability of outcome measures used between studies precluded a meta-analysis.

Conclusions

Glycopyrrolate, scopolamine/hyoscine, trihexyphenidyl/benzhexol, benztropine, and atropine have all shown efficacy in the treatment of sialorrhea in children. The small number of reports and the variability in study design precluded a meta-analysis. More studies are needed with uniformity in outcome measures to help guide evidence-based decision making. A guidance table is presented.

[Therapy of Sialorrhea with Botulinum Toxin - An Update]

The most important salivary glands are the paired parotid and submandibular glands. Adults produce 1 to 1.5 liters of saliva which are then regularly swallowed. When the act of swallowing is disturbed, salivation occurs. More rarely, the cause can be found in increased saliva production, for example, when caused through medication. Sialorrhea impairs the quality of life substantially and is frequently often socially stigmatizing. Therapy includes conservative measures such as functional dysphagia therapy, oral or transdermal application of anticholinergics, as well as, in selected cases, radiation and surgical measures. Over the last 20 years, local injection of botulinum toxin has been successfully applied in the treatment of this condition. With approval of incobotulinumtoxinA toxin for children and adults, this procedure will become the therapy of choice for chronic sialorrhea. The results of the phase III registration trials have demonstrated high efficacy and good safety of the injection treatment in both children and adults.

Radiation of parotid or submandibular glands is effective for drooling in patients with parkinsonism; a randomised double-blind placebo-controlled trial

Background

Drooling is a common symptom in patients with parkinsonism, causing physical and emotional distress. It is unknown which major salivary glands are the best candidates for irradiation to reduce drooling with minimal adverse events. Therefore, this study assessed the efficacy and safety of submandibular and parotid salivary gland irradiation to reduce drooling.

Methods

A prospective, randomised, double-blind, placebo-controlled trial was conducted at the University Medical Center Groningen, the Netherlands. After informed consent, 31 patients with parkinsonism and severe drooling according to the Unified Parkinson Disease Rating Scale (UPDRS) were included in this study. Exclusion criteria consisted of the use of anticholinergic drugs, the existence of salivary gland diseases, and/or an history of (pre)malignancies of the salivary glands. Patients were randomized for parotid-, submandibular- or sham irradiation (2x6 Gy with one week interval). Patients were evaluated at 1, 3, 6 and 12 months after radiation. Primary outcome measure was drooling severity according to the UPDRS. Secondary outcomes measures consisted of stimulated glandular salivary secretion rates and adverse effects.

Findings

Overall 31 parkinsonian patients were included. Initially 11 patients were radiated on the parotid glands, 10 patients on the submandibular glands and 10 patients were sham-radiated. After 6 months, the sham-radiated patients were actively treated after a second randomisation. One patient in the parotid radiation group discontinued his participation after three months due to physical deterioration. Radiation of parotid or submandibular glands significantly improved the existing drooling, as compared to placebo radiation. Parotid- and submandibular radiation was equally effective, but more patients in the submandibular radiated group reported sticky saliva vs. patients treated by parotid radiation (33∙33% vs. 13∙33%).

Interpretation

Major salivary gland radiation significantly improves drooling in parkinsonian patients with few adverse effects. However, parotid gland radiation is accompanied by fewer side effects and therefore is the preferred mode of radiation in this patient population.

Glycopyrrolate for drooling in children with medical complexity under three years of age

Background

The aim of the study is to determine that Glycopirrolate is safe and effective in decreasing drooling in children with medical complexity under 3 years of age. Medical treatment is based on anticholinergic drugs as transdermal scopolamine, benzotropine and GLY. GLY (Glycopyrronium bromide) is a synthetic quaternary ammonium anticholinergic agent with poor blood–brain barrier penetration and consequently has limited central effects. Actually, the oral GLY formulation was approved by the United States Food and Drug Administration (FDA) to treat drooling in children aged 3–16 years. Five studies reported on GLY use for the treatment of drooling in children with cerebral palsy and other conditions with neurological impairment; four are prospective studies while one a retrospective review.

Methods

this is a case report of eighteen children (sex ratio 11/8, median age 17 months, range 2–36 months) under three years of age, followed by a multidisciplinary team at the Bambino Gesù Children Hospital. The median follow-up was of 31.5 months (range 1–69 months). Response to treatment was assessed according to the Drooling Impact Scale administered at time 0 and after 1 month. All patients have an important neurological impairment: nine patients have a cerebral palsy (Gross Motor Function Classification System class V) and nine a genetic/malformative syndrome. Twelve patients have a tracheostomy and two need mechanical ventilation. Gastrostomy is present in 16 out of 18 patients. All patients received Glycopirrolate. The median starting daily dose was 0.065 mg/kg/die (range 0.02–0.21 mg/kg/die) three times a day. The drooling impact scale was administered at time O and after 1 month.

Results

Four out 18 patients stopped treatment for adverse event, lack of efficacy or parental decision. The mean Drooling Impact Scale at time 0 was 89 (range 81–100) and after 1 month 61(range 43–78); the difference was statistically significant (P < 0.001). The overall response to treatment was 94%.

Conclusions

This is the first study to determine the safety and effectiveness of Glycopyrrolate in decreasing drooling in a specific subset of patients. No major side effects were observed. Further comparative studies are needed to confirm our results.

Drooling outcome measures in paediatric disability: a systematic review

Drooling, or sialorrhea, is a common condition in patients with cerebral palsy, rare diseases, and neurodevelopmental disorders. The goal of this review was to identify the different properties of sialorrhea outcome measures in children. Four databases were analysed in search of sialorrhea measurement tools, and the review was performed according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) statement. The COnsensus-based Standards for the selection of health status Measurement INstruments (COSMIN) checklist was used for quality appraisal of the outcome measures. The initial search yielded 891 articles, 430 of which were duplicates. Thus, 461 full-text articles were evaluated. Among these, 21 met the inclusion criteria, reporting 19 different outcome measures that encompassed both quantitative measures and parent/proxy questionnaires.   Conclusions: Among the outcome measures found through this review, the 5-min Drooling Quotient can objectively discriminate sialorrhea frequency in patients with developmental disabilities. The Drooling Impact Scale can be used to evaluate changes after treatment. The modified drooling questionnaire can measure sialorrhea severity and its social acceptability. To date, the tests proposed in this review are the only tools displaying adequate measurement properties. The acquisition of new data about reliability, validity, and responsiveness of these tests will confirm our findings. What is Known: • Although sialorrhea is a recognized problem in children with disabilities, especially those with cerebral palsy (CP), there is a lack of confidence among physicians in measuring sialorrhea. What is New: • Few sialorrhea measures are available for clinicians that may guide decision-making and at the same time have strong evidence to provide confidence in the results. • A combination of both quantitative measures and parent/proxy questionnaires might provide an adequate measurement of sialorrhea in children.

Compounded glycopyrrolate is a compelling choice for drooling children: five years of facility experience

Background

Describe the efficacy of a galenic glycopyrrolate formulation and its impact on patients with sialorrhea Quality of Life (QoL), including costs analysis.

Methods

We performed a retrospective observational study on 21 patients who received a custom-formulated galenic glycopyrrolate syrup for sialorrhea for an average period of 14.3 months. We analyzed the telephone interviews with elaborated and validated questionnaires and the therapy costs comparing the brand marketed drug with the galenic formulation.

Results

Overall, 16 out of 21 patients (76.2%) reported a significant improvement in sialorrhea and QoL. In 14 subjects (66.7%), there was a remarkable decrease in the drooling severity; 10 individuals (47.6%) reported a reduction in drooling frequency. Nine patients experienced at least one adverse effect of glycopyrrolate therapy, and three of them stopped the treatment. No severe side effects were observed. The galenic drug significantly reduced costs for patients.

Conclusions

An oral glycopyrrolate solution easily administered to children with brain injuries is not commercially available in many European countries. This study demonstrates the efficacy of a compounded glycopyrrolate syrup on drooling severity, frequency and ensures a better QoL in patients and their caregivers.

Placebo-Controlled Clinical Trial of IncobotulinumtoxinA for Sialorrhea in Children: SIPEXI

BACKGROUND AND OBJECTIVES

To investigate the efficacy and safety of repeated injections of incobotulinumtoxinA (incoBoNT/A) for treatment of chronic sialorrhea (drooling) associated with neurologic disorders (e.g., cerebral palsy, traumatic brain injury) or intellectual disability in children and adolescents in a prospective phase III study (SIPEXI [Sialorrhea Pediatric Xeomin Investigation]).

METHODS

The study enrolled 2- to 17-year-old patients with sialorrhea due to neurologic disorders or intellectual disability. Patients received body weight-dependent doses of incoBoNT/A (20-75 U). A main period with 1 injection cycle (placebo-controlled, double-blind, 6- to 17-year-olds) was followed by an open-label extension with up to 3 further cycles. An additional cohort of 2- to 5-year-olds received active treatment throughout the study. Coprimary endpoints were the change in unstimulated salivary flow rate (uSFR) from baseline to week 4 and the carers' Global Impression of Change Scale (GICS) rating at week 4. Adverse events were recorded.

RESULTS

In the main period, 220 patients aged 6-17 years were randomized and treated (148 patients in incoBoNT/A group, 72 patients in placebo group). A total of 35 patients aged 2-5 years received incoBoNT/A (no placebo). A total of 214 patients aged 6-17 years and 33 patients aged 2-5 years continued treatment in the open-label extension period. For the 6- to 17-year-olds, a significant difference between incoBoNT/A and placebo was seen in mean uSFR decrease (difference -0.06 g/min; p = 0.0012) and the carers' GICS rating (difference 0.28 points; p = 0.032) at week 4, in favor of active treatment. The secondary endpoints consistently supported these results. A sustained benefit was observed during the extension. Incidences of adverse events were comparable between incoBoNT/A and placebo and did not increase notably with repeated injections. The most common adverse events were respiratory infections. Efficacy and safety were also favorable in the uncontrolled cohort of 2- to 5-year-olds.

DISCUSSION

Both co-primary efficacy endpoints were reached and superiority of incoBoNT/A over placebo was confirmed. IncoBoNT/A (up to 75 U, up to 4 cycles) is an effective and well-tolerated treatment for sialorrhea associated with neurologic disorders in children.

TRIAL REGISTRATION INFORMATION

Clinicaltrials.gov: NCT02270736 (clinicaltrials.gov/ct2/show/results/NCT02270736); EU Clinical Trials Register: 2013-004532-30 (clinicaltrialsregister.eu/ctr-search/search?query=2013-004532-30).

CLASSIFICATION OF EVIDENCE

This study provides Class I evidence that injection of incobotulinumtoxinA decreases drooling in children aged 6 to 17 years with neurologic disorders.

Drooling rating scales in Parkinson's disease: A systematic review

BACKGROUND

Drooling is a clinically relevant non-motor symptom of people with Parkinson's disease (PwP). Several drooling rating scales are available. Nevertheless, the compelling scientific evidence supporting their validity is limited. This study aims to evaluate clinical rating scales for drooling, assessing their characteristics, clinimetric properties, and clinical utility classification.

METHODS

A systematic review was undertaken. Two reviewers performed independent literature searches using the CENTRAL®, CINAHL®, Embase®, MEDLINE®, SciElo®, and SPEECH BITE® databases. We used consensus-based standards for the selection of health measurement instruments (COSMIN) and the International Parkinson's disease and the Movement Disorders (MDS) criteria to evaluate the included rating scales.

RESULTS

The following six rating scales were identified: Drooling Impact Scale (DIS), Sialorrhea Scoring Scale (SSS), Drooling Severity and Frequency Scale (DSFS), Drooling Rating Scale (DRS), Sialorrhea Clinical Scale for Parkinson Disease (SCS-PD), and the Radboud Oral Motor inventory for Parkinson's disease - Saliva (ROMP-saliva). The scales had heterogeneous characteristics: (i) not all were created/adapted for PwP; (ii) different dimensions associated with drooling are assessed; (iii) cross-cultural adaptations are limited to some languages. The clinimetric properties showed: (i) target population size limitations; (ii) incomplete reliability analysis; (iii) lack of robust validity; (iv) sensitivity to change not fully explored. Following the MDS criteria, only one tool was classified as "recommended", the ROMP-saliva.

CONCLUSIONS

This review provides information for an adequate selection of a drooling rating scale for clinical and/or research purposes. To date, ROMP-saliva is the only scale with substantial evidence of its clinimetric properties adequacy and data in PwP.

Cumulative Efficacy of Longitudinal Repeat Salivary Gland OnabotulinumtoxinA Injection: A Retrospective Study

AIM

We hypothesized that repeat onabotulinumtoxinA (BTX-A) injections to salivary glands would have a cumulative effect on drooling, leading to prolonged efficacy duration.

METHODS

We retrospectively reviewed medical records and conducted a telephone survey of individuals treated with BTX-A to the salivary glands to investigate ongoing efficacy or adverse effects. Outcome measures were duration of decrease in drooling and adverse events. The main independent variable was the number of injections. We identified 52 consecutive individuals (26 females) with cerebral palsy with an average age of 9 yrs, 3 mos ± 5 yrs 2 mos, who had received BTX-A for sialorrhea.

RESULTS

Linear regression analysis showed that each additional injection resulted in the duration of efficacy being 0.68 mos longer (P < 0.001, R2 = 0.47). Age, sex, Gross Motor Function Classification System level, presence of tube feeding, presence of tracheostomy, gastroesophageal reflex, seizures, and concurrent intramuscular injections seizures were not significant contributors to the association between injection number and efficacy duration (F (6, 45) = 1.01, P = 0.431).

INTERPRETATION

There may be a cumulative effect of BTX-A injections to the salivary glands, resulting in longer periods of efficacy with consecutive injection.

Application of aerosol therapy in respiratory diseases in children: A Saudi expert consensus

The Saudi Pediatric Pulmonology Association (SPPA) is a subsidiary of the Saudi Thoracic Society (STS), which consists of a group of Saudi experts with well-respected academic and clinical backgrounds in the fields of asthma and other respiratory diseases. The SPPA Expert Panel realized the need to draw up a clear, simple to understand, and easy to use guidance regarding the application of different aerosol therapies in respiratory diseases in children, due to the high prevalence and high economic burden of these diseases in Saudi Arabia. This statement was developed based on the available literature, new evidence, and experts' practice to come up with such consensuses about the usage of different aerosol therapies for the management of respiratory diseases in children (asthma and nonasthma) in different patient settings, including outpatient, emergency room, intensive care unit, and inpatient settings. For this purpose, SPPA has initiated and formed a national committee which consists of experts from concerned specialties (pediatric pulmonology, pediatric emergency, clinical pharmacology, pediatric respiratory therapy, as well as pediatric and neonatal intensive care). These committee members are from different healthcare sectors in Saudi Arabia (Ministry of Health, Ministry of Defence, Ministry of Education, and private healthcare sector). In addition to that, this committee is representing different regions in Saudi Arabia (Eastern, Central, and Western region). The subject was divided into several topics which were then assigned to at least two experts. The authors searched the literature according to their own strategies without central literature review. To achieve consensus, draft reports and recommendations were reviewed and voted on by the whole panel.

Exploring treatments for drooling in children with neurological disorders

Introduction: Drooling represents a major problem in the every-day life of pediatric patients with neurological disorders. The significant burden, both physical and socio-psychological, of the disorder requires adequate clinical evaluation and proper management. However, treating drooling remains a challenge for clinicians. This is a review of the most up-to-date therapeutic options for the treatment of drooling in the pediatric population, hence both conservative, pharmacological, and surgical approaches are discussed. Areas covered: Randomized clinical trials (RCTs), structured reviews, and case reports are included. Special focus is paid on the methods used to evaluate the efficacy and safety outcomes in the selected RCTs, trying to promote the use of more validated scales to assess drooling in the future. Expert opinion: The lack of reliable metrics to assess efficacy and safety outcomes in drooling limits researchers from identifying the best patient-suitable treatment. The relatively small number of clinical trials carried out over the last two decades is also due to the difficulty in assessing drooling using subjective scales. A key enabler for new efficient therapies stands in the introduction of accurate and robust metrics to measure treatment effectiveness on drooling.

Glycopyrrolate and Post-Operative Urinary Retention: A Narrative Review

The use of non-depolarizing neuromuscular blockade (NDNMB) necessitates the use of reversal agents. Glycopyrrolate, an anticholinergic agent, is commonly used in combination with neostigmine, an anticholinesterase, for the reversal of neuromuscular blockade medications. Glycopyrrolate is known to effect on the genitourinary system adversely with an inhibitory effect on bladder contraction, bladder hypotonia, and increase in the frequency of urinary retention. Many studies analyzing the association between glycopyrrolate and urinary retention are outdated and published over a decade ago. The decade old studies were retrospective and did not consider post-operative urinary retention (POUR) as a primary outcome. The purpose of this manuscript is to review the association between glycopyrrolate administration and post-operative urinary retention in the perioperative setting.

Suspected Overlap Between Serotonin Syndrome and Neuroleptic Malignant Syndrome in a Child Treated With Metoclopramide?

A 19-month-old child presented with fever and acute neurological deterioration with hypertonia, tremors, and clonus 1 day after starting metoclopramide. The clinical course of the patient was suggestive of neuroleptic malignant syndrome (NMS) and serotonin syndrome (SS), which can both be triggered by metoclopramide. This first pediatric report of an overlap between NMS and SS associated to metoclopramide highlights the importance of considering this new entity and its consequences on treatment.

Neurotoxin injection in benign submandibular gland hypertrophy: A first choice treatment

BACKGROUND

Various benign clinical entities with a symptomatology of hypertrophic submandibular glands like sialadenitis, sialadenosis, sialolithiasis, or an ageing neck have been described. Botulinum toxin type A is an elegant tool in the management of these conditions.

METHODS

This article is an original article, describing the Munich Concept of treating persistent submandibular swelling with Botulinum Toxin Type A from aesthetic and functional aspect. To shrink the affected tissue, 15 Units of Botox or Xeomin are applied in a single injection technique and under ultrasound guidance into the glands. Therefore, the 100 Units vial is being diluted with 3.5 of NaCl.

RESULTS

Intraglandular injections, using a specific dilution and dosage of the neurotoxin preparations, are very effective in the management of these swellings, offering safe and long-lasting results, with a high satisfaction rate. Our working group treated in the last 18 months 23 patients with benign, bilateral submandibular gland hypertrophies, which did not have any major complications.

CONCLUSION

As there is not yet described an ideal therapeutic strategy for the management of this symptomatology, we suggest, based on our experience, a concept with very promising results from functional and cosmetic aspect.

Anticholinergic medications for reducing drooling in children with developmental disability

AIM

To determine: the effectiveness of three anticholinergic medications in reducing drooling in children with developmental disabilities (such as cerebral palsy, intellectual disability, and autism spectrum disorder), the frequency and nature of side effects, and their impact on treatment discontinuation.

METHOD

After prescription of benzhexol hydrochloride, glycopyrrolate, or scopolamine patches at a tertiary saliva control clinic, all carers of 110 consecutive, eligible patients were recruited over a 5-year period. They provided data for 52 weeks, or until drug discontinuation, on compliance, drooling, adverse effects, and reasons for cessation. We evaluated and compared best drooling response, side effects, and drug cessation rates using survival analysis, and the effect of baseline variables on the discontinuation rate using proportional hazards regression.

RESULTS

Among 110 participants (71 males, 39 females; mean age 8y 5mo [SD 4y 3mo], range 1y 11mo-18y 11mo), benzhexol, glycopyrrolate, and scopolamine were prescribed 81, 62, and 17 times respectively, with respective response rates of 85%, 75%, and 65%. Poor head control and poor oromotor function were predictive of poor response. Side effects frequently prompted drug cessation in males more than females (hazard ratio 1.8 [95% confidence interval 1.0-3.2], p=0.048). Glycopyrrolate had the fewest side effects.

INTERPRETATION

Benzhexol, glycopyrrolate, and scopolamine reduce drooling, but improvement is offset by adverse side effects. Overall, glycopyrrolate performs best.

WHAT THIS PAPER ADDS

In drooling, glycopyrrolate produced the greatest improvement with fewer side effects compared with benzhexol and scopolamine. Poor head control and poor oromotor function were associated with poor response. Medication side effects were common and often led to treatment discontinuation. Behavioural issues instigated cessation of benzhexol more often in males than females.

Therapy of Sialorrhea with Botulinum Neurotoxin

Botulinum neurotoxin (BoNT) is considered the treatment of choice for various symptoms and diseases such as focal dystonia and focal spasticity. The effects of BoNT on the salivary glands have also been known for years, but their use was limited because of a lack of approval studies. Now the indication of sialorrhea is approved in some countries for incobotulinumtoxinA, such as the USA and Europe, and therapy could also become the treatment of choice. According to the pivotal study, a dose of 100 units of incobotulinumtoxinA, which is divided into the parotid and submandibular glands, is recommended. RimabotulinumtoxinB is approved in the USA only. To define the value of this therapy, we must consider anatomy, physiology, and available therapies. Therapy includes conservative measures such as functional dysphagia therapy, oral or transdermal application of anticholinergics, and, in selected cases, radiotherapy and surgical procedures. A combination of different approaches is optional. On the basis of the evidence and clinical experience, BoNT injections will be the first line of pharmacotherapy for chronic sialorrhea.

The burden of sialorrhoea in chronic neurological conditions: current treatment options and the role of incobotulinumtoxinA (Xeomin®)

Sialorrhoea is a frequent symptom of neurological diseases (e.g. Parkinson’s disease, motor neuron disease, cerebral palsy, and stroke) and is defined as excessive saliva accumulation leading to unintentional loss of saliva from the mouth. Sialorrhoea increases the overall burden on the patient and their caregivers, the impact of which can be both physical and psychosocial. Treatments for sialorrhoea range from lifestyle and behavioural guidance, to medications, surgery or radiation. Nonpharmacological interventions include advice on posture, swallowing control, cough management, dietary changes, eating and drinking techniques, and behavioural modification; however, these conservative measures may be ineffective for people with progressive neurological conditions. The pharmacological treatment of sialorrhoea is challenging because medications licensed for this purpose are limited, but treatments can include anticholinergic drugs and botulinum toxins. Surgical treatment of sialorrhoea is typically reserved as a last resort for patients. IncobotulinumtoxinA (Xeomin®) is the first botulinum toxin type A to receive US and UK marketing authorization for the symptomatic treatment of chronic sialorrhoea due to neurological disorders in adults. In this review, we discuss and compare the frequency and method of administration, location of treatment delivery, approximate annual costs and main side effects of botulinum toxin and different anticholinergic drugs. Management of patients with chronic neurological conditions requires input from multiple specialist teams and thus a multidisciplinary team (MDT) approach is considered fundamental to ensure that care is consistent and tailored to patients’ needs. To ensure that adult patients with neurological conditions receive the best care and sialorrhoea is well managed, we suggest a potential clinical care pathway for sialorrhoea with a MDT approach, which healthcare professionals could aspire to.

Pharmacology, toxicology and clinical safety of glycopyrrolate

The clinical use of the anticholinergic glycopyrrolate dates back to the early 1960s when it was first approved in the U.S. Since then, oral and inhalation formulations have been developed as therapeutic agents inhibiting the muscarinic acetylcholine receptor in various indications including chronic obstructive pulmonary disease (COPD), excessive salivation, and peptic ulcers. More recently, topical formulations of glycopyrrolate (GPB, also known as glycopyrronium bromide) have gained interest as a treatment option for excessive sweating (hyperhidrosis). The U.S. Food and Drug Administration (FDA) approved the first topical glycopyrronium product for the treatment of hyperhidrosis in 2018. Glycopyrrolate, as a quaternary amine, shows minimal penetration of the blood brain barrier which limits CNS side effects. In addition, lack of phototoxicity, genotoxicity and carcinogenicity makes it suitable for chronic indications. The information on the nonclinical and clinical safety profile of glycopyrronium supporting various therapeutically approved uses has been obtained from published literature, our own data as well as summary documents issued by regulatory bodies. Collectively, these data support the conclusion that the benefits of glycopyrronium generally outweigh the risks in chronic use indications that require muscarinic receptor antagonism to provide therapeutic effects.

Sialorrhea & aspiration control - A minimally invasive strategy uncomplicated by anticholinergic drug tolerance or tachyphylaxis

OBJECTIVE

Sialorrhea complicated by aspiration is a primary source of morbidity and mortality in neurologically impaired children. Anticholinergics are an effective treatment option, but have traditionally been considered only adjuncts due to tachyphylaxis and drug tolerance. Similarly, Botox-A^® salivary gland injections are also considered adjunctive due to the need to repeat treatment every 3 months. This retrospective case series assessed these two adjunctive strategies used in combination as definitive minimally invasive primary treatment.

METHODS

112 subjects diagnosed with sialorrhea and treated at UPMC Children's Hospital of Pittsburgh between 2004 and 2011 were identified. Charts were carefully reviewed for pertinent information regarding the treatment of their sialorrhea and related outcomes.

RESULTS

Over half of the subject undergoing BTX-A injections were able to reduce their dosage of anticholinergics after receiving injection (58%, n = 28 for glycopyrrolate users and 61%, n = 20 for scopolamine users). Subjects experienced a significant reduction in days spent in the hospital in the year following Botox-A^® injection (P-Value = 0.03), and the number of pneumonia episodes in the year following injection (P-Value = 0.04).

CONCLUSION

Patients treated effectively with both BTX-A injections into their salivary glands and anticholinergics developed neither tachyphylaxis nor drug tolerance with up to 9.6 years of continuous treatment. During the year following combined therapy, patients' average length hospital stay was reduced by a full week and the number of pneumonia episodes was statistically decreased. The failure rate of combined therapy was below that reported for any other intervention or combination of interventions in the literature. Finally, patients did not require BTX-A re-injection at the reported frequency. We hypothesize that anticholinergic medications competitively block acetylcholine attachment to post-synaptic receptors while BTX-A inhibits acetylcholine release at the pre-synaptic terminal, tachyphylaxis/drug tolerance mechanisms resulting in up-regulation of post-synaptic receptors are disrupted. Although salivary production may increase in the year following BTX-A injection, there is enough remaining activity at a molecular level to inhibit release of acetylcholine allowing salvage with anticholinergic medications at tolerable dosages.

Adult Head and Neck Health Care Needs for Individuals with Complex Chronic Conditions of Childhood

Millions of adults in the United States are currently living with what is termed chronic childhood conditions-childhood-onset conditions, about which adult providers often receive minimal training-and another half million youths with special health care needs enter adulthood each year and will undergo transition from pediatric to adult care. Here, the authors review the important otolaryngologic manifestations of several of these chronic childhood conditions, including autism spectrum disorder, cerebral palsy, and Down syndrome, as well as the primary care providers' role in caring for transitioning tracheostomy-dependent patients.

Drooling Reduction Intervention randomised trial (DRI): comparing the efficacy and acceptability of hyoscine patches and glycopyrronium liquid on drooling in children with neurodisability

OBJECTIVE

Investigate whether hyoscine patch or glycopyrronium liquid is more effective and acceptable to treat drooling in children with neurodisability.

DESIGN

Multicentre, single-blind, randomised controlled trial.

SETTING

Recruitment through neurodisability teams; treatment by parents.

PARTICIPANTS

Ninety children with neurodisability who had never received medication for drooling (55 boys, 35 girls; median age 4 years).

EXCLUSION CRITERIA

medication contraindicated; in a trial that could affect drooling or management.

INTERVENTION

Children were randomised to receive a hyoscine skin patch or glycopyrronium liquid. Dose was increased over 4 weeks to achieve optimum symptom control with minimal side-effects; steady dose then continued to 12 weeks.

PRIMARY AND SECONDARY OUTCOMES

Primary outcome: Drooling Impact Scale (DIS) score at week-4.

SECONDARY OUTCOMES

change in DIS scores over 12 weeks, Drooling Severity and Frequency Scale and Treatment Satisfaction Questionnaire for Medication; adverse events; children's perception about treatment.

RESULTS

Both medications yielded clinically and statistically significant reductions in mean DIS at week-4 (25.0 (SD 22.2) for hyoscine and 26.6 (SD 16) for glycopyrronium). There was no significant difference in change in DIS scores between treatment groups. By week-12, 26/47 (55%) children starting treatment were receiving hyoscine compared with 31/38 (82%) on glycopyrronium. There was a 42% increased chance of being on treatment at week-12 for children randomised to glycopyrronium relative to hyoscine (1.42, 95% CI 1.04 to 1.95).

CONCLUSIONS

Hyoscine and glycopyrronium are clinically effective in treating drooling in children with neurodisability. Hyoscine produced more problematic side effects leading to a greater chance of treatment cessation.

TRIAL REGISTRATION NUMBERS

ISRCTN 75287237; EUDRACT: 2013-000863-94; Medicines and Healthcare Products Regulatory Agency: 17136/0264/001-0003.

Glycopyrronium for severe drooling in children

Drooling of saliva is common in children with physical, intellectual and learning disability, and with poor neuromuscular coordination and oral control.¹ It can cause skin breakdown, damage to clothes and equipment and psychosocial problems for the child and family. For many years, glycopyrronium has been prescribed off-label using the injection solution given orally or tablets crushed and suspended in water, or as unlicensed products that were imported or manufactured as pharmaceutical specials.^2,3 In January 2017, a glycopyrronium oral solution (Sialanar-Proveca Limited) became available in the UK as the first licensed product for the treatment of severe drooling (sialorrhoea) in children and adolescents aged 3 years and older with chronic neurological disorders.^4-6 Here, we consider the place of this new product in the management of severe drooling.

Treatment of drooling with sublingual atropine sulfate in children and adolescents with cerebral palsy

ABSTRACT Atropine sulfate blocks the muscarinic receptors in the salivary glands and leads to reduced saliva production. There are no published studies about its use in children with cerebral palsy. Objective To report the effect of sublingual atropine sulfate to treat drooling in children with cerebral palsy by comparing the results of the Drooling Impact Scale in a non-controlled open clinical trial. Results Twenty-five children were assessed. The difference in the mean scores of the pre- and post-treatment scales reached statistical significance. There was a low frequency of side effects compared to studies with other anticholinergics. Conclusion The use of sublingual atropine sulfate seems to be safe and there is a reduction in the Drooling Impact Scale score, which suggests efficacy in the treatment of drooling in children and adolescents with cerebral palsy. Our results should be replicated in randomized, placebo-controlled studies with larger numbers of participants.

The Effect of Glycopyrrolate on Nocturnal Sialorrhea in Patients Using Clozapine: A Randomized, Crossover, Double-Blind, Placebo-Controlled Trial

BACKGROUND

Nocturnal sialorrhea is one of the most frequent adverse events in clozapine treatment. Symptomatic management of sialorrhea usually consists of off-label treatment with anticholinergic agents. The aim of the current study is to evaluate the efficacy and safety of glycopyrrolate in patients using clozapine that experience sialorrhea.

METHODS

In a double-blind randomized crossover trial, patients with nocturnal sialorrhea (n = 32) were randomized to treatment with glycopyrrolate 1 mg or placebo. This double-blinded phase was followed by an optional open label extension phase with glycopyrrolate 2 mg. Exposure periods consisted of 6 consecutive days and were separated with 1 washout week. The primary outcome was clinical improvement of nocturnal sialorrhea assessed by the Patient Global Impression of Improvement (PGI-I).

RESULTS

The proportion of patients with a clinical improvement according to PGI-I did not significantly differ between 1 mg and placebo (18.8% vs 6.3%, P = 0.289); however, in patients using glycopyrrolate 2 mg once daily versus placebo, it did (43.5% vs 6.3%, P = 0.039). Glycopyrrolate was not associated with severe adverse events or worsening of cognitive adverse events.

CONCLUSIONS

Glycopyrrolate 1 mg was not superior to placebo, whereas 2 mg showed a significant clinical improvement of nocturnal sialorrhea compared with placebo. Glycopyrrolate seemed to be a tolerable anticholinergic agent in the treatment of clozapine-associated sialorrhea.