Efficacy, Safety, and Tolerability of Ancrod in Patients With Sudden Hearing Loss

Inclusion Criteria: * Unilateral idiopathic sudden sensorineural hearing loss ≥30 dB * Symmetric hearing prior to onset of SSHL * Enrollment has to be accomplished within 7 days after SSHL onset Exclusion Criteria: * Bilateral SSHL * Incomplete recovery after previous SSHL * Previously existing, known retrocochlear hearing loss * Any history of any ear operation or local inflammatory disease in the past one year * History of blunt or penetrating ear trauma, head trauma, barotrauma, or acoustic trauma immediately preceding SSHL * History of Meniere's disease, autoimmune hearing loss, radiation-induced hearing loss, endolymphatic hydrops. * Treatment with steroids for any reason within the preceding 30 days. * Body weight \> 140 kg