Snowworld NV

This study will be performed to determine the long-term efficacy of 19.000 BU Oralgen grass pollen administered daily in patients with grass pollen related allergic rhinoconjunctivitis.

This study is designed to give additional information on the efficacy, safety and local effects (tolerability) of a dose of sublingual immunotherapy administered once a day, during a second grass pollen season.

The study is assessing efficacy and safety of three different dosage regimens of grass pollen sublingual immunotherapy in adult patients suffering from grass pollen related rhinoconjunctivitis.