Overview C1-INH Compared to Placebo at the Time of Prodromal Symptoms for Hereditary Angioedema (HAE) Exacerbation Status: Withdrawn Trial end date: 2012-07-01 Target enrollment: Participant gender: Summary The study hypothesis is that treatment of Hereditary Angioedema at the time of prodromal symptoms will decrease morbidity associated with the disease Phase: Phase 4 Details Lead Sponsor: Penn State UniversityTreatments: Complement C1 Inactivator ProteinsComplement C1 Inhibitor ProteinComplement C1s