Methods of treating or preventing a vertigo, nausea, or vomiting condition comprising injecting a subject with a pharmaceutically acceptable formulation consisting essentially of an effective amount of meclizine or a pharmaceutically acceptable salt thereof, a chemically modified cyclodextrin, and an aqueous carrier medium having a pH between about 2 and about 7 are disclosed. An injectable pharmaceutical formulation for treating or preventing a vertigo, nausea, or vomiting condition consisting essentially of an effective amount of meclizine, a chemically modified cyclodextrin, and an aqueous carrier medium having a pH between about 2 and about 7 is also disclosed.