• Br J Dis Chest · Oct 1987

    Randomized Controlled Trial Clinical Trial

    Effect of terbutaline administered from metered dose inhaler (2 mg) and subcutaneously (0.25 mg) on tracheobronchial clearance in mild asthma.

    • D Pavia, J E Agnew, P P Sutton, M T Lopez-Vidriero, M M Clay, M Killip, and S W Clarke.
    • Department of Thoracic Medicine, Royal Free Hospital, London.
    • Br J Dis Chest. 1987 Oct 1;81(4):361-70.

    AbstractTracheobronchial mucus clearance was measured in nine mild asthmatics, using an objective radioaerosol technique, on 3 separate days at intervals of 1 week. Immediately after radioaerosol inhalation, drug or placebo was administered via subcutaneous injection (SC) plus metered dose inhaler (MDI)--2 puffs. Three randomized treatments were used: saline placebo SC plus 2 mg terbutaline by MDI (1 mg per puff); 0.25 mg terbutaline SC plus placebo (propellants and surfactant only) by MDI; and double placebo. Changes in lung mucociliary clearance showed an inverse relationship to baseline clearance of both proximal and distal ciliated airways following inhaled terbutaline, whereas terbutaline SC related inversely only to baseline clearance of the distal ciliated airways. This may reflect the surface concentrations of drug, established by each route.

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