 - Subject must exhibit a moderate response upon 4.000 Dactylis glomerata pollen grainsm3 during 4 hours in the ECC on visit 2, which is defined as a Total Nasal Symptom Score of at least 6. TNSS is the sum of obstruction, rhinorrhea, itch, and sneeze, each of which has been scored on a scale from 0 to 3. 