Onset of Action and Efficacy of Astemizole, Cetirizine, Loratadine, and Terfenadine as Tested by Controlled Antigen Challenge in an Environmental Exposure Unit
Cetirizine, terfenadine, astemizole and loratadine are commonly used for the treatment of allergic rhinitis in Canada. All four medications have proven to be efficacious in standard clinical trials, but there has been no conclusive clinical evaluation of their relative times to onset of action.
KeywordsPlacebo Rhinitis Terfenadine Cetirizine Loratadine
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