Onset of symptomatic effect of mometasone furoate nasal spray in the treatment of nasal polyposis

BackgroundThe efficacy of the intranasal corticosteroid mometasone furoate nasal spray (MFNS) for treatment of nasal polyposis was demonstrated in 2 large clinical trials.ObjectiveTo evaluate the onset of MFNS symptomatic effect, data from the 2 trials were pooled and analyzed to determine the first day subjects experienced significant symptom relief.MethodsSubjects with nasal polyposis randomized to MFNS 200 μg twice daily or placebo scored symptoms on a 3-point scale (0 = none; 3 = severe) and measured peak nasal inspiratory flow immediately before the morning dose. Onset of symptomatic effect was defined as the first day a statistically significant (P < .05) lasting response was observed for MFNS compared with placebo.ResultsA total of 447 subjects with bilateral nasal polyps and clinically significant nasal congestion/obstruction were analyzed. Compared with placebo, MFNS 200 μg twice daily demonstrated statistically significant (P < .05) relief of anterior rhinorrhea by day 2 (–10.9% vs +5.7%), nasal congestion by day 3 (–15.1% vs –7.6%), postnasal drip by day 5 (+1.1% vs +4.6%), and sense of smell by day 13 (–9.6% vs –5.6%). Significant improvement in peak nasal inspiratory flow was seen by day 2 (increase of 6.22 L/min vs 1.48 L/min for placebo; P = .03).ConclusionMometasone furoate nasal spray 200 μg twice daily rapidly improves the symptoms of nasal polyposis, leading to lasting relief of most major symptoms within 2 (24 hours after the first dose) to 5 days of initiating therapy.