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• W1969012783 abstract "<i>Background:</i>Acidic inhalers can be associated with increased adverse reactions. <i>Objectives:</i> This study aimed to determine the acute local tolerability of acidic aqueous placebo formulations delivered via Respimat® Soft Mist™ Inhaler (SMI) and placebo chlorofluorocarbon metered dose inhaler (CFC-MDI).<i>Methods:</i> A single-dose (four inhalations), randomized, double-blind within Respimat SMI device, four-way crossover study in asthma patients with documented bronchial hyperresponsiveness was used. Patients received acidic placebo solutions [pH 2.7, 3.4 or 7.0 (neutral)], delivered via Respimat SMI or placebo CFC-MDI. The primary endpoint was the largest decrease in forced expiratory volume in 1 s (FEV₁) from baseline to 0–30 min after dosing. Secondary endpoints included spirometry, paradoxical bronchoconstriction (defined as a fall in FEV₁ ≧15% below baseline within 30 min of dosing), cough episodes and adverse events.<i>Results:</i> Thirty-two patients were included in the per-protocol population (mean age 27 years, 62.5% males). The mean percentage decrease in FEV₁ was comparable between treatment groups: –1.6% (Respimat SMI pH 2.7), –1.8% (Respimat SMI pH 7.0), –1.9% (CFC-MDI), and –2.3% (Respimat SMI pH 3.4); no patient experienced paradoxical bronchoconstriction. The mean number of cough episodes was significantly lower in the Respimat SMI pH 2.7 group versus CFC-MDI (p = 0.0165). No patient used rescue medication. Only 3 patients experienced at least one adverse event. <i>Conclusions:</i> The Respimat SMI pH 2.7 placebo solution does not induce adverse events in these patients. Compared with the CFC-MDI placebo suspension, Respimat SMI is a well-tolerated inhaled medication delivery system that can accommodate medication formulations with a wide range of pH solutions." @default.
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• W1969012783 date "2007-01-01" @default.
• W1969012783 modified "2023-10-17" @default.
• W1969012783 title "Acute Local Tolerability of Acidic Aqueous Vehicles Delivered via Respimat® Soft Mist™ Inhaler in Hyperreactive Asthma Patients" @default.
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• W1969012783 doi "https://doi.org/10.1159/000107739" @default.
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