A comparison of the effect of salmeterol and salbutamol in normal subjects.
1. The effects of salmeterol hydroxynaphthoate (50 micrograms, 8.3 x 10(-8) M) and salbutamol (200 micrograms, 3.5 x 10(-7) M) on sGaw were compared in a double-blind, placebo-controlled, randomised study in 10 normal subjects. 2. SGaw increased by 29% (14-43) (mean (CI)), 5 min after salmeterol and by 35% (19-51) at 15 min compared with an increase of 32% (14-51) and 37% (10-63) after salbutamol and 4% (-3-11) and 8% (0-16) after placebo. 3. The mean area under the sGaw-time curve (AUC480) after salmeterol inhalation was 22,500 kPa-1 (10,100-39,500) compared with 14100 kPa-1 (8020-24,500) after salbutamol and 5300 kPa-1 (1500-10,400) after placebo. 4. Salmeterol produced a significantly prolonged bronchodilator effect compared with salbutamol in normals.
Department of Medicine, Royal Postgraduate Medical School, Hammersmith Hospital, London.
J
J
Spring
J
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Clague
P W
PW
Ind
D000280:Administration, Inhalation; D000318:Adrenergic beta-Agonists / Q000494:pharmacology*; D000328:Adult; D000403:Airway Resistance / Q000187:drug effects*; D000420:Albuterol / Q000031:analogs & derivatives* / Q000494:pharmacology*; D000704:Analysis of Variance; D001993:Bronchodilator Agents / Q000494:pharmacology*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D000068299:Salmeterol Xinafoate; D013997:Time Factors
D000318:Adrenergic beta-Agonists; D001993:Bronchodilator Agents; D000068299:Salmeterol Xinafoate; D000420:Albuterol