Parkinson Disease Clinical Trial
Official title:
A Phase 2 Study to Assess the Effect of TD-9855 in Subjects With Neurogenic Orthostatic Hypotension
This multiple-center, 3-part, single-blind dose escalation (Part A), randomized, double-blind (Part B), and open-label multiple dose extension (Part C) study will be conducted in male and female subjects with neurogenic orthostatic hypotension to evaluate the effect of TD-9855 in improving symptoms of orthostatic intolerance.
Part A followed a daily, single-escalating-dose design, starting with placebo on Day 1, followed by a dose of 2.5 mg TD-9855 on Day 2, and proceeding to higher daily doses of TD-9855 up to a maximum dose of 20 mg based on safety, tolerability, and determination of a pressor effect. The starting dose in Part A was initially set to 1 mg (Day 2), escalating to a maximum dose of 10 mg (Day 5), but this was revised to start at 2.5 mg (Day 2) and escalate to 20 mg (Day 5) in protocol amendment 2 (Section 9.8.1). Part B followed a randomized, placebo-controlled, parallel design, evaluating an acute dose of TD-9855 that was determined to have a pressor effect and to be generally well tolerated for a given subject from Part A. Subjects who completed Part A, demonstrated a pressor effect in Part A, and remained otherwise eligible, had the option to receive open-label TD-9855 by tablet daily for up to 5 months (20 weeks) during Part C. ;
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