Generic Imitrex is used for the treatment of migraine headaches with or without aura (eg, flashing lights, wavy lines, dark spots). An aura is a strange feeling or visual disturbance that warns you of an attack. It is not used to prevent migraines.
Budesonide is a corticosteroid that prevents the release of substances in the body that cause inflammation. Budesonide inhalations is used to prevent asthma attacks in adults and children who are at least 6 years old.