4.5 Review

Ragweed sublingual immunotherapy (SLIT) tablets in allergic rhinoconjunctivitis: a systematic review and meta-analysis

Journal

EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY
Volume 279, Issue 6, Pages 2765-2775

Publisher

SPRINGER
DOI: 10.1007/s00405-022-07270-5

Keywords

Allergic rhinoconjunctivitis; Sublingual immunotherapy; Ragweed allergy

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This systematic review examines the effectiveness and safety of sublingual immunotherapy for allergic rhinoconjunctivitis caused by Ragweed. The results suggest that sublingual immunotherapy can improve symptoms, but more high-quality studies are needed to determine optimal dosing strategies.
Purpose Ragweed allergen causes Allergic rhinoconjunctivitis and sublingual immunotherapy is one of the treatment modalities to desensitize allergic individuals. This systematic review assesses the effectiveness and safety of sublingual immunotherapy for allergic rhinoconjunctivitis caused due to Ragweed. Methods The databases search was done through December 2020. English-language randomized controlled trials were included if they compared sublingual immunotherapy with placebo, pharmacotherapy, or other sublingual immunotherapy regimens, and reported clinical outcomes. The strength of the evidence for each comparison and outcome was graded based on the risk of bias, consistency, magnitude of effect, and the directness of the evidence. Results The searches performed according to the protocol identified 134 abstracts of which 67 were duplicates. A total of 37 full papers were therefore reviewed of which 5 were included for the final study. Participants' ages ranged from 4 to 58 years. The risk of bias was low in most studies. The review suggests that sublingual immunotherapy improves rhinoconjunctivitis symptoms, with 4 of 4 studies reporting efficacy showed improvement in the symptom score of SLIT groups compared to placebo. Local reactions were frequent, but anaphylaxis was not reported in any of the studies. Serious adverse events were very few in all the studies. Conclusions The overall evidence showed the effectiveness of sublingual immunotherapy for the treatment of allergic rhinoconjunctivitis with or without asthma, but high-quality studies are still needed to answer questions regarding optimal dosing strategies.

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