A Study of Mirabegron in Young Children With Neurogenic Detrusor Overactivity

Neurogenic Detrusor Overactivity Clinical Trial

Official title: A Phase 3, Open Label, Multicenter, Baseline-Controlled Sequential Dose Titration Study Followed by a Fixed Dose Observation Period to Evaluate Pharmacokinetics, Efficacy and Safety of Mirabegron Prolonged-Release Microgranula-Based Suspension in Children From 6 Months to Less Than 3 Years of Age With Neurogenic Detrusor Overactivity

Status Recruiting

Clinical Trial Summary

People with neurogenic detrusor overactivity have poor bladder control because of how their nerves to the bladder are wired. This can cause high pressure in the bladder. It can also cause the bladder to leak by accident (incontinence).

In this study, the researchers are studying whether a medicine, mirabegron, can help young children with neurogenic detrusor overactivity. The children will be from 6 months to under 3 years old. Mirabegron has already been approved for adults with bladder problems. The main aim of this study is to learn if mirabegron increases the maximum bladder capacity (to prevent high pressure in the bladder) in young children after 24 weeks of treatment. Maximum bladder capacity is the maximum amount of urine that the bladder can hold before it releases urine or starts to leak.

There will be 2 groups in the study. Young children who are not taking certain medicines for their condition will be in group A. Young children who are already taking certain medicines for this condition will be in group B. Children in group B will stop taking these medicines before taking mirabegron. Their treatment will be delayed by 2 weeks to allow the other medicines to be cleared from the body before treatment. Both groups (A and B) will take the same treatment and have the same checks throughout the study.

Children will have their vital signs checked (blood pressure, heart rate and body temperature). They will also have an ECG to check their heart rhythm and give urine samples for laboratory tests. Other tests will include checking how the bladder fills and empties plus an ultrasound of the bladder area. The caregivers will be shown how to check their child's blood pressure. They will be given an electronic diary to record the blood pressure, as well as any other medicines taken. They will do this every day for 7 days before each visit.

Mirabegron will be stirred into water, making it easier for children to drink. Children will drink mirabegron once a day for up to 52 weeks. They will start on a low dose, adjusted for their weight. If children are taking other medicines for this condition, they will wait an extra 2 weeks before starting mirabegron. At weeks 2, 4 and 8, the dose may be increased once to a higher dose if the study doctor thinks the child will benefit from the higher dose. The children and their caregivers will visit the clinic at 2, 4, 8, 12, 24, 52, and 54 weeks. There will be fewer clinic visits if a child stays on the lower dose of mirabegron. In this case, the clinic will phone the caregiver instead to check the information in the diary. During each visit, the children will have their vital signs checked and have an ECG. The caregiver will be asked if their child has had any medical problems. At some visits, the children will give urine and blood samples for laboratory tests. Other tests will include checking how the bladder fills and empties.

36 weeks after treatment starts, the clinic will phone the caregiver to ask if their child has had any medical problems, and will check the information in the diary. The children and their caregivers will visit the clinic 52 weeks after treatment starts. The caregiver will be asked if their child has had any medical problems. The children will have a physical exam and have their vital signs checked. Also, they will have an ECG and have urine and blood samples taken for laboratory tests. Other tests will include an ultrasound of the bladder area.

There will be a final clinic visit at 54 weeks. The caregiver will be asked if their child has had any medical problems. The children will have a physical exam and will have their vital signs checked. They will also have an ECG.

The caregiver will be asked to complete a survey on their child's experience with taking mirabegron. They will do this at 4, 24 and 52 weeks after their child starts treatment.

Finally, the clinic will phone the caregiver 30 days after the last dose of mirabegron to check if there were any further medical problems.

No other visits are planned during this study.

Clinical Trial Description

n/a

Related Conditions & MeSH terms

• Neurogenic Detrusor Overactivity
• Urinary Bladder, Overactive

• NCT number: NCT05621616
• Study type: Interventional
• Source: Astellas Pharma Inc
• Contact: Astellas Pharma Global Development, Inc.
• Phone: 800-888-7704
• Email: Astellas.registration@astellas.com
• Status: Recruiting
• Phase: Phase 3
• Start date: February 28, 2024
• Completion date: June 30, 2026