Assessment of overall efficacy and tolerability
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59.3% (0.1% azelastine treatment), 50.0% (0.02% azelastine treatment) and 80.8% (placebo treatment) of patients assessed the overall tolerability of the treatment as ‘very good’, which mirrored the tolerability judgement of the investigators, which was assessed as ‘very good’ for 59.3% (0.1% azelastine treatment), 50.0% (0.02% azelastine treatment) and 80.8% (placebo treatment) of patients. The efficacy of the treatment was judged as ‘good’ or ‘very good’ by 75.0% (0.1% azelastine treatment), 74.1% (0.02% azelastine treatment) and 50.0% (placebo treatment) of patients. The investigators judged the efficacy as ‘good’ or ‘very good’ in 74.1% (0.1% azelastine treatment), 82.1% (0.02% azelastine treatment) and 73.1% (placebo treatment) of treated patients. Overall, no statistical differences between groups were determined.