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  • Title: Dose-response relationship of the H1-histamine antagonist, ebastine, against histamine and methacholine-induced bronchoconstriction in patients with asthma.
    Author: Wood-Baker R, Holgate ST.
    Journal: Agents Actions; 1990 Apr; 30(1-2):284-6. PubMed ID: 1973585.
    Abstract:
    In a double blind, randomised, placebo controlled trial in a group of extrinsic asthmatics, we have evaluated the potency and selectivity of ebastine, a new piperidine-type H1-receptor antagonist, against histamine and methacholine-induced bronchoconstriction. The median histamine PC20FEV1 value following placebo was 3.15 mg/ml (0.24-58.84). When compared with placebo, ebastine produced significant protection at 10 mg (median PC20 = 31.36 mg/ml, p = 0.008) and 30 mg (median PC20 = 42.14 mg/ml, p = 0.001) but there appeared to be no significant dose effect. Ebastine also produced a small shift in the methacholine concentration-response curves to the right. We conclude that ebastine is an effective antagonist of histamine-induced bronchoconstriction in the asthmatic airway with evidence of minor blockade of methacholine-induced bronchoconstriction.
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