Neuromyelitis Optica (NMO) & Cetirizine

Inclusion Criteria

• •18 years to 85
• •Meet criteria for the diagnosis of neuromyelitis optica as outlined by Wingerchuk et al in 2006. Alternatively patients may be included if they have had an episode of myelitis or optic neuritis in combination with a positive NMO IgG antibody, as positive antibody with a first episode is highly associated with future relapse.
• •Disease duration of at least 6 months
• •Stable, without any NMO relapses, for the 3 months prior to the baseline assessment visit
• •Ability to understand the purpose and risks of the study and provide signed and dated informed consent and authorization to use protected health information (PHI) in accordance with national and local subject privacy regulations.