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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Loratadine in the treatment of cough associated with allergic rhinoconjunctivitis.

BACKGROUND: Antihistaminic treatment of allergic asthma or cough-type asthma, including cough associated with allergic rhinocojunctivitis, has been recently reconsidered prospectively since new very potent compounds, nonsedating with anti-allergic properties, are available. OBJECTIVE: The possible effectiveness of loratadine in the treatment of allergic cough was assessed in 20 patients with allergic rhinoconjunctivitis and cough due to Parietaria judaica during the pollen season ( April to July 1993). METHODS: Allergic patients were enrolled in a double-blind, placebo-controlled, parallel-group, randomized study, and received loratadine 10 mg/d or placebo in oral tablets for 4 weeks. Occurrence and severity of conjunctival and nasal symptoms, severity and frequency of cough attacks were assessed daily by the patients together with peak expiratory flow evaluation performed twice a day, ie, in the morning and in the evening. Physicians evaluated conjunctival and nasal signs, and spirometry on admission (before treatment), 2 and 4 weeks after treatment. On admission methacholine challenge was also performed to assess PD20. Pollen counts were assessed during the study. RESULTS: According to patients' diary cards, ocular and nasal symptoms were progressively reduced by loratadine treatment (respectively P < .05 and P < .01), as well as cough frequency (P < .05) and cough intensity (P < .01). Peak expiratory flow rate, forced vital capacity, and forced expiratory volume in one second significantly decreased in the placebo-treated group (P < .01), while they were not modified in loratadine-treated patients, who remained normal. CONCLUSIONS: The study suggests that loratadine may be beneficial in the treatment of allergic cough, as well as in rhinoconjunctivitis. Further studies of this may be warranted.[1]


  1. Loratadine in the treatment of cough associated with allergic rhinoconjunctivitis. Ciprandi, G., Buscaglia, S., Catrullo, A., Marchesi, E., Bianchi, B., Canonica, G.W. Ann. Allergy Asthma Immunol. (1995) [Pubmed]
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