Time-limited protective effect of inhaled frusemide against aspirin-induced bronchoconstriction in aspirin-sensitive asthmatics

• Published in: The European respiratory journal Vol. 7; no. 10; pp. 1825 - 1829
• Main Authors: Sestini, P, Pieroni, MG, Refini, RM, Robuschi, M, Gambaro, G, Spagnotto, S, Vaghi, A, Bianco, S
• Format: Journal Article
• Language: English
• Published: Leeds Eur Respiratory Soc 01-10-1994; Maney
• Subjects: Administration, Inhalation; Adult; Aged; Aspirin - adverse effects; Asthma - chemically induced; Asthma - physiopathology; Asthma - prevention & control; Biological and medical sciences; Bronchoconstriction - drug effects; Chronic obstructive pulmonary disease, asthma; Double-Blind Method; Drug Hypersensitivity - physiopathology; Female; Furosemide - administration & dosage; Furosemide - therapeutic use; Humans; Male; Medical sciences; Middle Aged; Pneumology; Time Factors; Human; Prevention; Immunopathology; Allergy; Chemotherapy; Respiratory disease; Efficiency; Duration; Obstructive pulmonary disease; Antiasthma agent; Asthma
• ISSN: 0903-1936; 1399-3003
• DOI: 10.1183/09031936.94.07101825

Inhaled frusemide effectively prevents the bronchial obstructive response to allergens and to a number of nonallergic stimuli. In most of the experimental models in which it has been tested, the protective effect of frusemide has been evaluated for only a short time after administration. In aspirin-sensitive patients, acetylsalicylic acid causes an asthmatic reaction which typically lasts for 2 h or more after exposure. We investigated the presence and duration of the protective effect of inhaled frusemide against the bronchial response to aspirin in sensitive patients, using a specific inhalation challenge with lysine acetylsalicylate (LASA). In the first study, eight subjects with aspirin-asthma underwent two bronchial challenges with a single dose of lysine acetylsalicylate administered through a jet nebulizer, after treatment with 40 mg inhaled frusemide or placebo, according to a randomized, double-blind protocol. Forced expiratory volume in one second (FEV1) was monitored for 120 min after challenge. In the second study in eight patients, the protocol was modified by the use of a dosimeter for delivery of lysine acetylsalicylate, by reducing the dose of lysine acetylsalicylate to avoid intense reactions, and by extending the follow-up to 4 h. In the first study, after placebo, FEV1 gradually decreased, reaching a maximum decrement of 39 +/- 3% at 120min. Inhaled frusemide exerted a significant protection at all time-points, although this activity appeared to decrease with time. In the second study, after placebo, inhaled lysine acetylsalicylate caused a gradual decrease in FEV1, which reached a maximum decrement at 180 min.