In total , 612 chronic rhinitis patients ( perennial allergic rhinitis [ PAR ] , n = 424 ; nonallergic rhinitis , n = 188 ) aged 12 years or older were enrolled into this open-label , parallel-group study and randomized to MP29-02 ( 1 spray/nostril bid ) or FP nasal spray ( 2 sprays/nostril qd ) for 52 weeks .