Lack of dose-response effect of terfenadine on resting bronchomotor tone in patients with asthma.
Bronchodilatation data from three, four-period cross-over studies were combined to assess the effect of oral terfenadine 60, 120, 180 mg and placebo on the airways of 26 patients with atopic asthma. Meta-analysis of these data showed that mean changes in FEV1 from pre-dose to 4 hr were 11.4, 14.6 and 11.8% for the three doses of terfenadine, respectively, and -2.9% for placebo. There was a significant treatment effect (P = 0.0001) but no effect of dose. Terfenadine, a non-sedating histamine H1-receptor antagonist, caused bronchodilatation in a single dose. Whether this effect is sustained with long-term treatment requires further investigation.
Patel
K R
KR
Department of Respiratory Medicine, Western Infirmary, Glasgow, U.K.
Ghosh
S K
SK
Matcham
J
J
D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000188:drug therapy* / Q000503:physiopathology; D001559:Benzhydryl Compounds / Q000494:pharmacology*; D001980:Bronchi / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D005260:Female; D005541:Forced Expiratory Volume; D006634:Histamine H1 Antagonists / Q000494:pharmacology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009129:Muscle Tonus / Q000187:drug effects*; D012146:Rest; D016593:Terfenadine
D001559:Benzhydryl Compounds; D006634:Histamine H1 Antagonists; D016593:Terfenadine