NASCOBAL® (Cyanocobalamin, USP) Nasal Spray is a prescription medicine used as a supplement to treat vitamin B12 deficiency. It is designed to bypass the GI tract and be absorbed directly into the bloodstream. It is clinically proven to have increased and maintained healthy vitamin B12 levels. NASCOBAL® is a tasteless and odorless fine mist with a convenient, once-weekly dosing regimen: 1 spray, 1 nostril, 1x a week.*