Do allergy shots help seasonal allergies more than antihistamines and nasal steroids?
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Multiple randomized controlled trials (RCTs) demonstrate the effectiveness of both allergen immunotherapy and antihistamines, with or without nasal steroids, in the treatment of seasonal allergic rhinitis (strength of recommendation [SOR]: A). No RCTs directly compare immunotherapy with conservative management. Treatment decisions are driven by the clinical presentation, patient and physician preferences, practice guidelines, and expert opinion (SOR: C, based on expert opinion). In standard practice, immunotherapy is not recommended for most patients with seasonal allergic rhinitis.
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