Efficacy of cetirizine in the treatment of seasonal allergic rhinoconjunctivitis.

The efficacy of cetirizine, 10 mg once daily, in the treatment of seasonal allergic rhinoconjunctivitis was evaluated in a double-blind placebo-controlled trial. Sixteen patients monosensitized to olive pollen were treated simultaneously for 6 weeks, including one pollen season. Severity of symptoms and rescue drug consumption were significantly lower in the cetirizine group.