A Study Investigating the Effect of Montelukast in Patients With Seasonal Allergic Rhinitis (MK-0476-192)(COMPLETED)

A Multicenter, Double-Blind, Randomized, Parallel-Group Study Investigating the Clinical Effect of Montelukast in Patients With Seasonal Allergic Rhinitis-Fall Study

A study of the ability of montelukast to improve signs and symptoms of seasonal allergic rhinitis compared with placebo. Loratadine is included in the study as an active control.

Inclusion Criteria:

• Patient has a documented clinical history of seasonal allergic rhinitis symptoms that become worse during the study season
• Patient is a non-smoker
• Patient is in good mental and physical health

Exclusion Criteria:

• Patient is hospitalized
• Patient is a woman who is <8 weeks postpartum or is breast feeding
• Patient intends to move or vacation away during the study
• Patient is a current or past abuser of alcohol or illicit drugs