Effect of verapamil inhalation on bronchial asthma

Sharma, Surender K. ; Pande, J. N. (1990) Effect of verapamil inhalation on bronchial asthma Journal of Asthma, 27 (1). pp. 31-36. ISSN 0277-0903

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Official URL: http://informahealthcare.com/doi/abs/10.3109/02770...

Related URL: http://dx.doi.org/10.3109/02770909009073291


The effect of inhaled verapamil 20 mg on pulmonary functions and arterial blood gases in 15 patients with extrinsic bronchial asthma was studied in single-blind fashion. A significant decrease (p < 0.05) in airway resistance and a significant increase (p < 0.01) in specific conductance was observed after verapamil inhalation. A small increase (p < 0.1) was observed in forced vital capacity and peak expiratory flow rate after verapamil inhalation; however, this was not statistically significant. None of the parameters of pulmonary function tests showed a significant change after normal saline inhalation. A significant fall in Pa02 (p < 0.05) and Paco2 (p < 0.05) was noted after normal saline inhalation. Paco2 showed a significant fall (p < 0.01) after verapamil inhalation. Alveolar arterial oxygen gradient P(A-a)C>2 widened significantly (p < 0.001) after normal saline inhalation. A larger dose (20 mg) of verapamil inhalation produces a significant bronchodilator effect on large airways, but does not produce a significant change in arterial oxygen tension from the baseline value in patients with bronchial asthma.

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