How effective are nasal steroids combined with nonsedating antihistamines for seasonal allergic rhinitis?
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For treating seasonal allergic rhinitis, inhaled nasal corticosteroids are superior to nonsedating antihistamines (Grade of recommendation: A, based on a large meta-analysis of randomized controlled trials [RCTs]). Combining nasal steroids and nonsedating antihistamines yields no additional benefits (Grade of recommendation: A, based on several RCTs). Unless patient preference limits their use, nasal steroids should be first-line therapy.
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