Overall, subjects on average received 1.4 injections per week throughout the study period. The efficacy of Cinryze directly correlated with the interval between injections where 1000 units every 2 to 4 days resulted in 1 attack for every 132 days of treatment compared to 1000 units every 6 to 7 days which resulted in 1 attack for every 46 days of treatment. No clinical characteristics predicted the response to prophylactic C1INH-nf, including historical attack frequency.At enrollment, 42 subjects (28.8 percent) were taking regular prophylactic androgens in an effort to prevent attacks of HAE. During the study, 23 subjects (54.8 percent) discontinued androgens, 6 subjects (14.3 percent) discontinued regular use and switched to as-needed use, 5 subjects (11.9 percent) reduced the androgen dose, and 8 subjects (19 percent) remained on the same dose. The median monthly attack rate in the 23 subjects who discontinued androgens went from 3 attacks per month while on androgens to 0 attacks per month when switched to prophylactic Cinryze.
ViroPharma's Cinryze® (C1 Esterase Inhibitor [human]) Open Label Prophylaxis Study Showed Up To 2.6 Years Of Effectiveness In Majority Of Subjects With Hereditary Angioedema
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