At a glance
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Long Term Use of HPN-100 in Urea Cycle Disorders
In Brief
A Phase 4 clinical trial evaluating HPN-100 for Urea Cycle Disorders. Completed, enrolled 88 participants across 16 sites in 2 countries.
Detailed Summary
This was an open-label, long-term safety study of HPN-100 (RAVICTI; glycerol phenylbutyrate) in participants with a urea cycle disorder (UCD) who completed the safety extensions of HPN-100-005 (NCT00947544; HPN-100-005SE), HPN-100-006 (NCT00947297; HPN-100-007), or HPN-100-012 (NCT01347073; HPN-100-012SE). The initial studies were 1- to 2-week crossover studies, and their associated safety extensions were 12-month, open-label studies. All participants who completed the initial studies were eligible to enroll in the associated safety extension studies, and new participants were also permitted to enroll directly into the safety extension studies.
Study Details
Timeline
Interventions
Participants received individualized doses of HPN-100 orally, three times daily (TID) with meals. The initial dose was the same dose administered at the end of the HPN-100-005SE, HPN-100-007, or HPN-100-012SE studies. Dose adjustments (including frequency adjustments) were permitted as judged clinically appropriate by the investigator based on assessment of ammonia-scavenging needs (e.g., severity of the UCD defect, dietary protein intake, and urinary phenylacetylglutamine \[PAGN\] excretion). The maximum recommended dose of HPN-100 in participants weighing less than 20 kg was 0.53 mL/kg/day (equivalent to 600 mg/kg/day of NaPBA), and was 11.48 mL/m²/day in heavier subjects (equivalent to 13g/m²/day of NaPBA). The maximum HPN-100 dose recommended per protocol was 17.4 mL/day, which is equivalent to 20 g/day of NaPBA.