Wilson Disease Clinical Trial
Official title:
CHELATE STUDY: Trientine Tetrahydrochloride (TETA 4HCL) for the Treatment of Wilson's Disease
This is a multicenter, randomized, open-label study with an active standard-of-care comparator (penicillamine)
This is a multicenter, randomized, open label study with an active standard-of-care comparator. Stable patients who are already considered to be stable on their standard-of-care penicillamine chelation therapy for at least 1 year will enroll in the study and enter a 12-week Penicillamine Baseline Period comprising of 1 month (4 weeks) run-in period followed by a 2 month (8 weeks) evaluation period. During this time all patients will continue to take their current penicillamine under study conditions. At the end of the Penicillamine Baseline Period, patients who fulfill the protocol definition of being adequately controlled and tolerating penicillamine will be randomized in a 1:1 ratio to receive either TETA 4HCl or to continue to receive penicillamine. There is then a 24-week Post-randomization Phase comprising of a 1 month (4 weeks) run-in period for both treatment arms and a 5 month (20 weeks) evaluation period. Patients who successfully complete the 24-week Post-randomization Phase of the study will have the opportunity to enter an Extension Phase. In the first version of the clinical trial protocol, the intention was to have an 18 month (72 weeks) Extension Phase. During the first 24 weeks of the Extension Phase, subjects would continue receiving their allocated TETA 4HCl or penicillamine (i.e., up to Week 60 of the study). Thereafter all patients were receiving TETA 4HCl for a further 48 weeks (i.e., from Week 60 to Week 108). Study clinic visits occur were scheduled every 6 months in the Extension Phase. With the final version of the protocol, the Extension Phase stopped at Week 60. Patients who already passed the Week 60 visit were allowed to end the study at the next planned visit. As a consequece end of treatment varied Week 60 and Week 108 ;
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