May Clearing Nasal Viruses Improve Allergic Rhinitis? - Takeaways - MDSpire

May Clearing Nasal Viruses Improve Allergic Rhinitis?

A phase 2 randomized trial suggests reducing nasal commensal viruses with ribavirin spray may improve allergic rhinitis symptoms while supporting a proposed disease mechanism.

  • By

  • Andrea Surnit

  • July 7, 2026

  • 4 min

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  • 1

    A phase 2 trial found that ribavirin nasal spray may reduce symptoms in patients with allergic rhinitis compared to placebo.

  • 2

    Ribavirin treatment resulted in lower Total Nasal Symptom Scores and improvements in secondary endpoints after 4 weeks.

  • 3

    Exploratory analyses indicated ribavirin reduced nasal commensal virus abundance, while the placebo group showed no change.

  • 4

    Laboratory studies in mouse models demonstrated that reducing nasal commensal viruses decreased allergic inflammation.

  • 5

    The study's limitations include its small size and the need for larger trials to confirm the findings and assess safety.

Original Source(s)

May Clearing Nasal Viruses Improve Allergic Rhinitis?

  • by Andrea Surnit

  • July 7, 2026

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