Hereditary Angioedema Clinical Trial
Official title:
LEVP2005-1/Part A: A Double-blind, Placebo-Controlled, Clinical Study to Investigate the Efficacy and Safety of Purified C1 Esterase Inhibitor (Human) for the Treatment of HAE in Acute Attacks
The study objective was to determine the safety and efficacy of C1INH-nf for the treatment of acute HAE attacks.
Randomized subjects treated for a qualifying attack were eligible to receive rescue dosing with 1,000 U of C1INH-nf if they did not achieve beginning of substantial relief of the defining symptom within 4 hours after initial treatment with blinded study drug, or if at any time the attack progressed to include airway compromise. A second 1,000 U rescue dose was permitted 60 minutes after the initial rescue dose, if necessary. The study design also allowed for administration of open-label C1INH-nf for laryngeal angioedema attacks, which were non-randomizable events due to the presence of or potential for airway compromise (immediate 1,000 U dose of C1INH-nf, repeated after 60 minutes, if necessary). In addition, subjects were eligible to receive open-label C1INH-nf (1,000 U single dose) prior to emergency surgical (non-cosmetic) procedures. A total of 83 subjects were enrolled in the study. Seventy-one (71) subjects experienced qualifying attacks and were randomized to blinded study drug (36 C1INH-nf, 35 placebo); only the 71 randomized subjects were analyzed for efficacy. An additional 12 subjects were never randomized but received open-label C1INH-nf for treatment of laryngeal angioedema and/or prior to emergency surgical procedures. Of the 35 subjects randomized to placebo, 23 also received C1INH-nf (eg, rescue, open-label). In total, 83 subjects received at least 1 dose of study drug and were analyzed for safety; 71 subjects were exposed to C1INH-nf (59 randomized, 12 open-label only) and 12 subjects were exposed only to placebo. ;
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