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Allergic rhinitis is a global cause of disability, characterized by airway inflammation. Sumatriptan is a 5-hydroxytryptamine 1B/1D (5HT1B/1D) agonist used as a treatment for migraine headaches. Activation of 5HT1B/1D receptors can inhibit the release of neuropeptides and inhibit the inflammation cascades. This study investigated the effect of sumatriptan on ovalbumin-induced allergic rhinitis model in mice and the role of nitric oxide.