“…46 Combination therapy with intranasal corticosteroids may provide added benefit. 339 The only intranasal antihistamines currently available in the United States, azelastine, [332][333][334][335][336][337][338] and olopatadine, 340 have a rapid onset of action. 341 Bitter taste has been reported with both preparations, and sedation may occur 342 (Table VII).…”