A Study to Assess Intranasal Repeat Dose Effect of Levocabastine in the Subjects With Allergic Rhinitis

Inclusion Criteria: * Diagnosis of Allergic Rhinitis (AR), as determined by the presence of seasonal or perennial rhinitis symptoms for several months per year, for more than 1 year and are not attributed to infections or nasal abnormalities. * Subjects have a TNSS score of \>=6 at the baseline screening allergen challenge. Total nasal symptom score is the sum of nasal congestion, rhinorrhoea, nasal itch and sneeze, each of which are scored on a scale from 0 to 3. * Subjects have a positive skin prick test (wheal \>=4 millimeter \[mm\]) for seasonal pollen at or within the 12 months preceding the screening visit. * Subjects have a positive radioallergosorbent test (RAST) (\>=class 2) for seasonal pollen at or within the 12 months preceding the screening visit. * There are no conditions or factors that would make the subject unlikely to be able to stay in the chamber for 4 hours. * Male/females between 18 and 65 years of age inclusive, at the time of signing the informed consent. * Healthy as determined by a responsible and experienced physician, based on a medical evaluation including medical history, physical examination, laboratory tests and cardiac monitoring. A subject with a clinical abnormality or laboratory parameter(s) which is/are not specifically listed in the inclusion or exclusion criteria, outside the reference range for the population being studied may be included only if the Investigator agree and document that the finding is unlikely to introduce additional r…