A Two-week Open-label Pharmacodynamic and Pharmacokinetic Study of Multiple Doses of a Darifenacin Liquid Oral Suspension in Children (2 - 15 Years) With Neurogenic Detrusor Overactivity

A 14-day, Open-label, Multicenter, Dose-escalating, Sequential Cohort Study to Evaluate Pharmacodynamics (Urodynamics) and Pharmacokinetics, Clinical Efficacy, Tolerability and Safety Following Multiple Doses (mg/kg/Day) of a Darifenacin Liquid Oral Suspension Given BID in Children, Ages 2 - 15 Years, With Neurogenic Detrusor Overactivity

This study will evaluate the pharmacodynamics and pharmacokinetics of darifenacin liquid oral suspension in children, ages 2-15 years, with neurogenic detrusor overactivity. The results will support a benefit-risk based dosage recommendation for phase IIIa clinical trials.

Inclusion Criteria:

• Male and female participants ages 2-15 years
• Documented detrusor overactivity associated with a known neurological condition such as meningomyelocele or spinal cord injury, and confirmed by urodynamics at baseline
• Using clean intermittent catheterization (CIC) on a regular basis
• Participating in a bowel program on a regular basis
• Able to swallow the study medication in accordance to the protocol
• Participants and/or parent/guardian able to complete the bladder diary and follow the study procedures

Exclusion Criteria:

• Treatment with drugs known to significantly affect the urinary bladder and urinary bladder outlet function
• Fecal impaction. Participants may be included, once this condition has resolved
• Clinically significant anatomical abnormalities or acquired disorders of the urinary tract
• Previous reconstructive surgery (augmentation etc.) of the bladder or bladder outlet
• Symptomatic urinary tract infection unresolved at time of urodynamic study and/or completion of bladder diary.
• Diabetes insipidus
• Electro stimulation therapy or bladder training within 2 weeks prior to Visit 1 and at any time during the study
• Concomitant diseases, in which the use of darifenacin is contraindicated
• History of hypersensitivity to darifenacin or to drugs with similar chemical structures
• Participants with any physical and cognitive impairment or any other condition which in the opinion of the investigator makes the participants unsuitable for inclusion
• Female adolescent of child-bearing potential, unless using an acceptable method of contraception
• Pregnant or nursing (lactating) female adolescents Other protocol-defined inclusion/exclusion criteria may apply.