We will be dosing montelukast once a day, which is the manufacturer's suggested dosing schedule. Active drug will be compared to a placebo vehicle, which will mimic the active drug. With the proposed design study, a run-in period is not essential; however, to establish baseline symptoms and adherence to therapy, we have chosen a 1-week run-in while on placebo. After run-in, patients will be randomized to either active drug or placebo after baseline questionnaires and other data are collected. A daily diary to determine symptoms of allergic rhinitis and nighttime disturbance, as well as, daytime fatigue will be issued and expected to be completed daily. Two weeks after randomization, a follow-up will be scheduled in order to insure compliance, to collect diaries, administer questionnaires, and start the second treatment phase. After this visit study subjects will enter a 1-week wash-out and have a return visit before being randomized to the alternative arm. At six weeks, subjects will again be seen to insure compliance and administer questionnaires. The study will conclude following six-weeks. The data used for analyses will be the data collected during the last week of each randomized period. This will decrease cross over affect, typically seen in classical cross over studies, since there will be only a short washout between cross over.